This file contains information about GCC releases which has been generated
automatically from the online release notes.  It covers releases of GCC
(and the former EGCS project) since EGCS 1.0, on the line of development
that led to GCC 3. For information on GCC 2.8.1 and older releases of GCC 2,
see ONEWS.

======================================================================
http://gcc.gnu.org/gcc-4.1/index.html

                           GCC 4.1 Release Series

Release History

References and Acknowledgements

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list  of [1]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features, improvements, bug fixes, and other changes
   as well as test results to GCC. This [2]amazing group of volunteers is
   what makes GCC successful.

   For  additional  information  about  GCC  please  refer  to the [3]GCC
   project web site or contact the [4]GCC development mailing list.

   To obtain GCC please use [5]our mirror sites, one of the [6]GNU mirror
   sites, or [7]our CVS server.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [8]gnu@gnu.org. There
   are also [9]other ways to contact the FSF.

   These pages are maintained by [10]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [11]GCC   manuals.   If   that   fails,   the
    [12]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [13]gcc@gnu.org   or
    [14]gcc@gcc.gnu.org. All of our lists have [15]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-11-19 [16]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-4.1/buildstat.html
   2. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   3. http://gcc.gnu.org/index.html
   4. mailto:gcc@gcc.gnu.org
   5. http://gcc.gnu.org/mirrors.html
   6. http://www.gnu.org/order/ftp.html
   7. http://gcc.gnu.org/cvs.html
   8. mailto:gnu@gnu.org
   9. http://www.gnu.org/home.html#ContactInfo
  10. http://gcc.gnu.org/about.html
  11. http://gcc.gnu.org/onlinedocs/
  12. mailto:gcc-help@gcc.gnu.org
  13. mailto:gcc@gnu.org
  14. mailto:gcc@gcc.gnu.org
  15. http://gcc.gnu.org/lists.html
  16. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.1/changes.html

                           GCC 4.1 Release Series
                      Changes, New Features, and Fixes

Caveats

General Optimizer Improvements

     * GCC  now has infrastructure for inter-procedural optimizations and
       the following inter-procedural optimizations are implemented:
          + Profile  guided  inlining. When doing profile feedback guided
            optimization,  GCC  can  now  use  the profile to make better
            informed  decisions  on  whether  inlining  of  a function is
            profitable  or not. This means that GCC will no longer inline
            functions at call sites that are not executed very often, and
            that  functions  at  hot  call  sites  are  more likely to be
            inlined.
            A  new parameter min-inline-recursive-probability is also now
            available  to  throttle  recursive inlining of functions with
            small average recursive depths.
          + Discovery of pure and const functions, a form of side-effects
            analysis.  While  older GCC releases could also discover such
            special  functions,  the  new  IPA-based pass runs earlier so
            that  the  results are available to more optimizers. The pass
            is also simply more powerful than the old one.
          + Analysis  of  references  to static variables and type escape
            analysis, also forms of side-effects analysis. The results of
            these passes allow the compiler to be less conservative about
            call-clobbered variables and references. This results in more
            redundant   loads  being  eliminated  and  in  making  static
            variables candidates for register promotion.
          + Improvement  of RTL-based alias analysis. The results of type
            escape analysis are fed to the RTL type-based alias analyzer,
            allowing it to disambiguate more memory references.
          + Interprocedural constant propagation and function versioning.
            This pass looks for functions that are always called with the
            same   constant  value  for  one  or  more  of  the  function
            arguments,   and   propagates   those  constants  into  those
            functions.
          + GCC  will  now  eliminate  static  variables  whose usage was
            optimized out.
          + -fwhole-program  --combine  can  now  be  used  to  make  all
            functions   in   program   static   allowing   whole  program
            optimization.  As  an  exception,  the  main function and all
            functions  marked  with  the new externally_visible attribute
            are  kept  global  so  that  programs  can  link with runtime
            libraries.
     * GCC can now do a form of partial dead code elimination (PDCE) that
       allows code motion of expressions to the paths where the result of
       the  expression  is  actually needed. This is not always a win, so
       the  pass has been limited to only consider profitable cases. Here
       is an example:
    int foo (int *, int *);
    int
    bar (int d)
    {
      int a, b, c;
      b = d + 1;
      c = d + 2;
      a = b + c;
      if (d)
        {
          foo (&b, &c);
          a = b + c;
        }
      printf ("%d\n", a);
    }
               The  a  =  b  +  c  can  be  sunk  to  right  before  the  printf.
       Normal  code  sinking will not do this, it will sink the first one
       above  into  the  else-branch of the conditional jump, which still
       gives you two copies of the code.
     * GCC  now  has  a  value  range  propagation  pass. This allows the
       compiler  to  eliminate bounds checks and branches. The results of
       the   pass   can   also  be  used  to  accurately  compute  branch
       probabilities.
     * The  pass  to  convert  PHI nodes to straight-line code (a form of
       if-conversion for GIMPLE) has been improved significantly. The two
       most   significant  improvements  are  an  improved  algorithm  to
       determine  the order in which the PHI nodes are considered, and an
       improvement  that  allow  the  pass  to consider if-conversions of
       basic blocks with more than two predecessors.
     * Alias  analysis  improvements.  GCC  can now differentiate between
       different  fields  of  structures  in  Tree-SSA's virtual operands
       form. This lets stores/loads from non-overlapping structure fields
       not  conflict.  A  new  algorithm  to  compute  points-to sets was
       contributed  that  can  allows  GCC to see now that p->a and p->b,
       where  p  is a pointer to a structure, can never point to the same
       field.
     * Various enhancements to auto-vectorization:
          + Incrementally preserve SSA form when vectorizing.
          + Incrementally preserve loop-closed form when vectorizing.
          + Improvements  to  peeling for alignment: generate better code
            when  the misalignment of an access is known at compile time,
            or  when  different  accesses  are  known  to  have  the same
            misalignment,  even  if  the  misalignment  amount  itself is
            unknown.
          + Consider dependence distance in the vectorizer.
          + Externalize  generic parts of data reference analysis to make
            this analysis available to other passes.
          + Vectorization of conditional code.
          + Reduction support.
     * GCC  can now partition functions in sections of hot and cold code.
       This   can   significantly   improve  performance  due  to  better
       instruction  cache locality. This feature works best together with
       profile feedback driven optimization.
     * A  new  pass to avoid saving of unneeded arguments to the stack in
       vararg  functions  if the compiler can prove that they will not be
       needed.
     * Transition  of  basic block profiling to tree level implementation
       has  been completed. The new implementation should be considerably
       more  reliable  (hopefully  avoiding  profile mismatch errors when
       using  -fprofile-use or -fbranch-probabilities) and can be used to
       drive higher level optimizations, such as inlining.
       The  -ftree-based-profiling  command  line  option was removed and
       -fprofile-use  now  implies disabling old RTL level loop optimizer
       (-fno-loop-optimize).    Speculative    prefetching   optimization
       (originally enabled by -fspeculative-prefetching) was removed.

New Languages and Language specific improvements

  C and Objective-C

     * The  old Bison-based C and Objective-C parser has been replaced by
       a new, faster hand-written recursive-descent parser.

  Ada

     * The build infrastructure for the Ada runtime library and tools has
       been  changed  to  be better integrated with the rest of the build
       infrastructure  of GCC. This should make doing cross builds of Ada
       a bit easier.

  C++

     * ARM-style  name-injection  of friend declarations is no longer the
       default. For example:
          struct S {
            friend void f();
          };

          void g() { f(); }
       will  not  be accepted; instead a declaration of f will need to be
       present  outside  of  the  scope  of S. The new -ffriend-injection
       option will enable the old behavior.
     * The   (undocumented)  extension  which  permitted  templates  with
       default arguments to be bound to template template parameters with
       fewer  parameters  has been deprecated, and will be removed in the
       next major release of G++. For example:
       template <template <typename> class C>
       void f(C<double>) {}

       template <typename T, typename U = int>
       struct S {};

       template void f(S<double>);

       makes use of the deprecated extension. The reason this code is not
       valid  ISO  C++  is  that  S  is  a  template with two parameters;
       therefore, it cannot be bound to C which has only one parameter.

    Runtime Library (libstdc++)

     * Optimization work:
          + A  new  implementation  of  std::search_n is provided, better
            performing in case of random access iterators.
          + Added further efficient specializations of istream functions,
            i.e., character array and string extractors.
          + Other smaller improvements throughout.
     * A  versatile  string  class,  __gnu_cxx::__versa_string, providing
       facilities   conforming   to   the   standard   requirements   for
       basic_string, is delivered in <ext/vstring.h>. In particular:
          + Two  base  classes  are  provided:  the  default  one  avoids
            reference  counting  and  is optimized for short strings; the
            alternate  one,  still  uses  it while improving in a few low
            level  areas  (e.g.,  alignment).  See vstring_fwd.h for some
            useful typedefs.
          + Various  algorithms  have been rewritten (e.g., replace), the
            code streamlined and simple optimizations added.
          + Option  3  of DR 431 is implemented for both available bases,
            thus improving the support for stateful allocators.
     * As  usual,  many  bugs  have  been  fixed  (e.g., libstdc++/13583,
       libstdc++/23953) and LWG resolutions put into effect for the first
       time  (e.g.,  DR  280,  464,  TR1  Issue 6.19). The implementation
       status of TR1 is now tracked in the docs in tr1.html.

  Objective-C++

     * A  new  language  front end for Objective-C++ has been added. This
       language  allows  users  to  mix  the  object oriented features of
       Objective-C with those of C++.

  Java (GCJ)

     * Core  library  (libgcj) updates based on GNU Classpath 0.15 - 0.19
       features (plus some 0.20 bug-fixes)
          + Networking
               o The  java.net.HttpURLConnection implementation no longer
                 buffers  the  entire response body in memory. This means
                 that  response  bodies  larger than available memory can
                 now be handled.
          + (N)IO
               o NIO   FileChannel.map   implementation,  fast  bulk  put
                 implementation  for  DirectByteBuffer  (speeds  up  this
                 method 10x).
               o FileChannel.lock() and FileChannel.force() implemented.
          + XML
               o gnu.xml  fix  for  nodes  created  outside  a  namespace
                 context.
               o Add     support     for     output     indenting     and
                 cdata-section-elements     output     instruction     in
                 xml.transform.
               o xml.xpath      corrections      for      cases     where
                 elements/attributes   might   have   been   created   in
                 non-namespace-aware mode. Corrections to handling of XSL
                 variables and minor conformance updates.
          + AWT
               o GNU JAWT implementation, the AWT Native Interface, which
                 allows  direct  access  to  native screen resources from
                 within  a  Canvas's paint method. GNU Classpath Examples
                 comes with a Demo, see
                 libjava/classpath/examples/README.
               o awt.datatransfer   updated   to  1.5  with  support  for
                 FlavorEvents. The gtk+ awt peers now allow copy/paste of
                 text,  images,  URIs/files  and  serialized objects with
                 other  applications and tracking clipboard change events
                 with  gtk+  2.6  (for  gtk+ 2.4 only text and serialized
                 objects   are   supported).  A  GNU  Classpath  Examples
                 datatransfer   Demo   was   added   to   show   the  new
                 functionality.
               o Split  gtk+  awt peers event handling in two threads and
                 improve gdk lock handling (solves several awt lock ups).
               o Speed up awt Image loading.
               o Better  gtk+  scrollbar  peer  implementation when using
                 gtk+ >= 2.6.
               o Handle  image loading errors correctly for gdkpixbuf and
                 MediaTracker.
               o Better  handle  GDK lock. Properly prefix gtkpeer native
                 functions (cp_gtk).
               o GdkGraphics2D  has  been  updated  to use Cairo 0.5.x or
                 higher.
               o BufferedImage  and  GtkImage rewrites. All image drawing
                 operations  should now work correctly (flipping requires
                 gtk+ >= 2.6)
               o Future Graphics2D, image and text work is documented at:
                 [1]http://developer.classpath.org/mediation/ClasspathGra
                 phicsImagesText 
               o When  gtk+  2.6  or  higher is installed the default log
                 handler  will  produce  stack traces whenever a WARNING,
                 CRITICAL or ERROR message is produced.
          + Free Swing
               o The  RepaintManager has been reworked for more efficient
                 painting, especially for large GUIs.
               o The  layout  manager OverlayLayout has been implemented,
                 the  BoxLayout  has  been  rewritten  to make use of the
                 SizeRequirements  utility  class  and  caching  for more
                 efficient layout.
               o Improved accessibility support.
               o Significant progress has been made in the implementation
                 of  the  javax.swing.plaf.metal  package,  with  most UI
                 delegates  in a working state now. Please test this with
                 your  own  applications  and  provide feedback that will
                 help us to improve this package.
               o The  GUI  demo  (gnu.classpath.examples.swing.Demo)  has
                 been  extended to highlight various features in our Free
                 Swing  implementation.  And  it includes a look and feel
                 switcher for Metal (default), Ocean and GNU themes.
               o The javax.swing.plaf.multi package is now implemented.
               o Editing  and  several  key  actions for JTree and JTable
                 were implemented.
               o Lots  of  icons  and look and feel improvements for Free
                 Swing basic and metal themes were added. Try running the
                 GNU     Classpath     Swing     Demo     in     examples
                 (gnu.classpath.examples.swing.Demo)                with:
                 -Dswing.defaultlaf=javax.swing.plaf.basic.BasicLookAndFe
                 el or
                 -Dswing.defaultlaf=javax.swing.plaf.metal.MetalLookAndFe
                 el
               o Start of styled text capabilites for java.swing.text.
               o DefaultMutableTreeNode       pre-order,      post-order,
                 depth-first  and  breadth-first  traversal  enumerations
                 implemented.
               o JInternalFrame colors and titlebar draw properly.
               o JTree  is  working  up  to  par  (icons,  selection  and
                 keyboard traversal).
               o JMenus   were   made   more  compatible  in  visual  and
                 programmatic behavior.
               o JTable    changeSelection    and   multiple   selections
                 implemented.
               o JButton  and  JToggleButton  change states work properly
                 now.
               o JFileChooser fixes.
               o revalidate()  and  repaint() fixes which make Free Swing
                 much more responsive.
               o MetalIconFactory implemented.
               o Free  Swing  Top-Level  Compatibility.  JFrame, JDialog,
                 JApplet,   JInternalFrame,   and  JWindow  are  now  1.5
                 compatible  in  the  sense  that  you can call add() and
                 setLayout()  directly  on them, which will have the same
                 effect    as    calling    getContentPane().add()    and
                 getContentPane().setLayout().
               o The  JTree  interface  has  been  completed.  JTrees now
                 recognizes mouse clicks and selections work.
               o BoxLayout works properly now.
               o Fixed GrayFilter to actually work.
               o Metal SplitPane implemented.
               o Lots of Free Swing text and editor stuff work now.
          + Free RMI and Corba
               o Andrew  Watson, Vice President and Technical Director of
                 the  Object Management Group, has officially assigned us
                 20  bit  Vendor  Minor Code Id: 0x47430 ("GC") that will
                 mark   remote   classpath-specific   system  exceptions.
                 Obtaining  the  VMCID  means that GNU Classpath now is a
                 recogniseable  type  of  node  in a highly interoperable
                 CORBA world.
               o GNU  Classpath  now  includes the first working draft to
                 support   the   RMI  over  IIOP  protocol.  The  current
                 implementation   is   capable   of  remote  invocations,
                 transferring  various  Serializables and Externalizables
                 via  RMI-IIOP  protocol.  It  can flatten graphs and, at
                 least  for  the  simple cases, is interoperable with 1.5
                 JDKs.
               o org.omg.PortableInterceptor and related functionality in
                 other packages is now implemented:
                    # The  sever and client interceptors work as required
                      since 1.4.
                    # The IOR interceptor works as needed for 1.5.
               o The  org.omg.DynamicAny  package is completed and passes
                 the prepared tests.
               o The  Portable  Object  Adapter  should  now  support the
                 output  of  the  recent  IDL  to  java  compilers. These
                 compilers now generate servants and not CORBA objects as
                 before,  making  the  output  depend on the existing POA
                 implementation.  Completing POA means that such code can
                 already  be tried to run on Classpath. Our POA is tested
                 for the following usager scenarios:
                    # POA converts servant to the CORBA object.
                    # Servant provides to the CORBA object.
                    # POA  activates  new  CORBA  object  with  the given
                      Object Id (byte array) that is later accessible for
                      the servant.
                    # During   the   first   call,  the  ServantActivator
                      provides  servant for this and all subsequent calls
                      on the current object.
                    # During   each  call,  the  ServantLocator  provides
                      servant for this call only.
                    # ServantLocator or ServantActivator forwards call to
                      another server.
                    # POA  has  a  single  servant,  responsible  for all
                      objects.
                    # POA  has  a  default  servant, but some objects are
                      explicitly connected to they specific servants.
                 The   POA  is  verified  using  tests  from  the  former
                 cost.omg.org.
               o The CORBA implementation is now a working prototype that
                 should  support  features up to 1.3 inclusive. We invite
                 groups  writing  CORBA  dependent  applications  to  try
                 Classpath  implementation,  reporting any possible bugs.
                 The   CORBA   prototype   is  interoperable  with  Sun's
                 implementation  v  1.4,  transferring object references,
                 primitive   types,  narrow  and  wide  strings,  arrays,
                 structures,  trees,  abstract interfaces and value types
                 (feature  of  CORBA  2.3)  between  these two platforms.
                 Remote exceptions are transferred and handled correctly.
                 The  stringified  object  references (IORs) from various
                 sources  are  parsed  as  required.  The  transient (for
                 current   session)  and  permanent  (till  jre  restart)
                 redirections  work.  Both  Little and Big Endian encoded
                 messages  are  accepted.  The implementation is verified
                 using  tests  from  the former cost.omg.org. The current
                 release  includes  working  examples  (see  the examples
                 directory),      demonstrating     the     client-server
                 communication,  using  either CORBA Request or IDL-based
                 stub  (usually  generated  by  a  IDL to java compiler).
                 These  examples also show how to use the Classpath CORBA
                 naming  service.  The  IDL  to  java compiler is not yet
                 written,  but  as  our  library  must  be compatible, it
                 naturally    accepts    the   output   of   other   idlj
                 implementations.
          + Misc
               o Updated TimeZone data against Olson tzdata2005l.
               o Make zip and jar packages UTF-8 clean.
               o "native"  code  builds  and  compiles  (warning free) on
                 Darwin and Solaris.
               o java.util.logging.FileHandler now rotates files.
               o Start of a generic JDWP framework in gnu/classpath/jdwp.
                 This  is unfinished, but feedback (at classpath@gnu.org)
                 from  runtime  hackers  is greatly appreciated. Although
                 most  of the work is currently being done around gcj/gij
                 we  want this framework to be as VM neutral as possible.
                 Early design is described in:
                 [2]http://gcc.gnu.org/ml/java/2005-05/msg00260.html
               o QT4    AWT    peers,    enable   by   giving   configure
                 --enable-qt-peer. Included, but not ready for production
                 yet. They are explicitly disabled and not supported. But
                 if  you  want  to help with the development of these new
                 features we are interested in feedback. You will have to
                 explicitly  enable  them  to try them out (and they will
                 most likely contain bugs).
               o Documentation    fixes   all   over   the   place.   See
                 [3]http://developer.classpath.org/doc/

New Targets and Target Specific Improvements

  IA-32/x86-64

     * The  x86-64  medium model (that allows building applications whose
       data  segment  exceeds  4GB)  was  redesigned  to match latest ABI
       draft. New implementation split large datastructures into separate
       segment  improving performance of accesses to small datastructures
       and also allows linking of small model libraries into medium model
       programs  as  long  as  the  libraries are not accessing the large
       datastructures   directly.  Medium  model  is  also  supported  in
       position independent code now.
       The  ABI  change  results  in partial incompatibility among medium
       model   objects.  Linking  medium  model  libraries  (or  objects)
       compiled with new compiler into medium model program compiled with
       older will likely result in exceeding ranges of relocations.
       Binutils  2.16.91 or newer are required for compiling medium model
       now.

  RS6000 (POWER/PowerPC)

     * The  AltiVec  vector primitives in <altivec.h> are now implemented
       in  a  way that puts a smaller burden on the preprocessor, instead
       processing  the  "overloading"  in  the  front  ends.  This should
       benefit compilation speed on AltiVec vector code.
     * AltiVec initializers now are generated more efficiently.
     * The popcountb instruction available on POWER5 now is generated.
     * The  floating  point  round  to  integer instructions available on
       POWER5+ now is generated.
     * Floating point divides can be synthesized using the floating point
       reciprocal estimate instructions.
     * Double  precision  floating  point  constants  are  initialized as
       single precision values if they can be represented exactly.

  S/390, zSeries and System z9

     * Support  for  the IBM System z9 109 processor has been added. When
       using  the  -march=z9-109  option, the compiler will generate code
       making  use  of  instructions  provided  by the extended immediate
       facility.
     * Support for 128-bit IEEE floating point has been added. When using
       the  -mlong-double-128  option,  the  compiler  will  map the long
       double data type to 128-bit IEEE floating point. Using this option
       constitutes an ABI change, and requires glibc support.
     * Various changes to improve performance of generated code have been
       implemented, including:
          + In  functions  that  do  not require a literal pool, register
            %r13   (which  is  traditionally  reserved  as  literal  pool
            pointer),  can  now  be freely used for other purposes by the
            compiler.
          + More  precise tracking of register use allows the compiler to
            generate  more  efficient  function prolog and epilog code in
            certain cases.
          + The  SEARCH  STRING,  COMPARE LOGICAL STRING, and MOVE STRING
            instructions are now used to implement C string functions.
          + The  MOVE  CHARACTER  instruction with single byte overlap is
            now  used to implement the memset function with non-zero fill
            byte.
          + The LOAD ZERO instructions are now used where appropriate.
          + The  INSERT  CHARACTERS  UNDER  MASK,  STORE CHARACTERS UNDER
            MASK,  and  INSERT  IMMEDIATE  instructions are now used more
            frequently to optimize bitfield operations.
          + The  BRANCH ON COUNT instruction is now used more frequently.
            In  particular,  the  fact  that a loop contains a subroutine
            call   no  longer  prevents  the  compiler  from  using  this
            instruction.
          + The   compiler  is  now  aware  that  all  shift  and  rotate
            instructions implicitly truncate the shift count to six bits.
     * Back-end  support  for  the  following  generic  features has been
       implemented:
          + The full set of built-in functions for atomic memory access.
          + The -fstack-protector feature.
          + The optimization pass avoiding unnecessary stores of incoming
            argument registers in functions with variable argument list.

  SPARC

     * The  default  code  model  in  64-bit  mode  has been changed from
       Medium/Anywhere to Medium/Middle on Solaris.
     * TLS support is disabled by default on Solaris prior to release 10.
       It  can be enabled on TLS-capable Solaris 9 versions (4/04 release
       and later) by specifying --enable-tls at configure time.

  MorphoSys

     * Support has been added for this new architecture.

Obsolete Systems

Documentation improvements

Other significant improvements

     * GCC   can   now   emit   code  for  protecting  applications  from
       stack-smashing  attacks.  The  protection  is  realized  by buffer
       overflow  detection  and  reordering  of  stack variables to avoid
       pointer corruption.
     * Some  built-in  functions  have  been  fortified  to  protect them
       against    various    buffer    overflow   (and   format   string)
       vulnerabilities.  Compared to the mudflap bounds checking feature,
       the  safe  builtins  have  far  smaller  overhead. This means that
       programs  built  using  safe  builtins  should  not experience any
       measurable slowdown.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [4]gnu@gnu.org. There
   are also [5]other ways to contact the FSF.

   These pages are maintained by [6]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [7]GCC    manuals.   If   that   fails,   the
    [8]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing    list   at   [9]gcc@gnu.org   or
    [10]gcc@gcc.gnu.org. All of our lists have [11]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2006-02-27 [12]Valid XHTML 1.0 

References

   1. http://developer.classpath.org/mediation/ClasspathGraphicsImagesText
   2. http://gcc.gnu.org/ml/java/2005-05/msg00260.html
   3. http://developer.classpath.org/doc/
   4. mailto:gnu@gnu.org
   5. http://www.gnu.org/home.html#ContactInfo
   6. http://gcc.gnu.org/about.html
   7. http://gcc.gnu.org/onlinedocs/
   8. mailto:gcc-help@gcc.gnu.org
   9. mailto:gcc@gnu.org
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/lists.html
  12. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.0/index.html

                           GCC 4.0 Release Series

   September 28, 2005

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.0.2.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 4.0.1 relative to previous releases of GCC.

   July 7, 2005

   The  [2]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.0.1.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 4.0.0 relative to previous releases of GCC.

   April 20, 2005

   The  [3]GNU project and the GCC developers are pleased to announce the
   release of GCC 4.0.0.

Release History

   GCC 4.0.2
          September 28, 2005 ([4]changes)

   GCC 4.0.1
          July 7, 2005 ([5]changes)

   GCC 4.0.0
          April 20, 2005 ([6]changes)

References and Acknowledgements

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list  of [7]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features, improvements, bug fixes, and other changes
   as well as test results to GCC. This [8]amazing group of volunteers is
   what makes GCC successful.

   For  additional  information  about  GCC  please  refer  to the [9]GCC
   project web site or contact the [10]GCC development mailing list.

   To  obtain  GCC  please  use  [11]our mirror sites, one of the [12]GNU
   mirror sites, or [13]our CVS server.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There
   are also [15]other ways to contact the FSF.

   These pages are maintained by [16]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [17]GCC   manuals.   If   that   fails,   the
    [18]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [19]gcc@gnu.org   or
    [20]gcc@gcc.gnu.org. All of our lists have [21]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-09-29 [22]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://www.gnu.org/
   3. http://www.gnu.org/
   4. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
   5. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.1
   6. http://gcc.gnu.org/gcc-4.0/changes.html
   7. http://gcc.gnu.org/gcc-4.0/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/index.html
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/mirrors.html
  12. http://www.gnu.org/order/ftp.html
  13. http://gcc.gnu.org/cvs.html
  14. mailto:gnu@gnu.org
  15. http://www.gnu.org/home.html#ContactInfo
  16. http://gcc.gnu.org/about.html
  17. http://gcc.gnu.org/onlinedocs/
  18. mailto:gcc-help@gcc.gnu.org
  19. mailto:gcc@gnu.org
  20. mailto:gcc@gcc.gnu.org
  21. http://gcc.gnu.org/lists.html
  22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-4.0/changes.html

                           GCC 4.0 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 4.0 release series is [1]GCC 4.0.2.

Caveats

     * GCC  now  generates  location lists by default when compiling with
       debug info and optimization.
          + GDB  6.0  and  older crashes when it sees location lists. GDB
            6.1  or later is needed to debug binaries containing location
            lists.
          + When  you  are trying to view a value of a variable in a part
            of  a function where it has no location (for example when the
            variable is no longer used and thus its location was used for
            something else) GDB will say that it is not available.
       You can disable generating location lists by -fno-var-tracking.
     * GCC  no  longer  accepts  the -fwritable-strings option. Use named
       character arrays when you need a writable string.
     * The  options  -freduce-all-givs  and -fmove-all-movables have been
       discontinued.  They  were  used to circumvent a shortcoming in the
       heuristics  of  the  old  loop  optimization  code with respect to
       common  Fortran  constructs.  The  new (tree) loop optimizer works
       differently and doesn't need those work-arounds.
     * The  graph-coloring  register  allocator,  formerly enabled by the
       option -fnew-ra, has been discontinued.
     * -I-  has been deprecated. -iquote is meant to replace the need for
       this option.
     * The MIPS -membedded-pic and -mrnames options have been removed.
     * All  MIPS  targets  now  require the GNU assembler. In particular,
       IRIX  configurations  can  no  longer  use the MIPSpro assemblers,
       although they do still support the MIPSpro linkers.
     * The SPARC option -mflat has been removed.
     * English-language   diagnostic   messages   will  now  use  Unicode
       quotation  marks  in  UTF-8 locales. (Non-English messages already
       used   the   quotes  appropriate  for  the  language  in  previous
       releases.)  If  your  terminal  does not support UTF-8 but you are
       using  a  UTF-8  locale  (such  locales  are  the  default on many
       GNU/Linux   systems)   then  you  should  set  LC_CTYPE=C  in  the
       environment   to   disable   that   locale.  Programs  that  parse
       diagnostics  and  expect  plain  ASCII  English-language  messages
       should  set  LC_ALL=C. See [2]Markus Kuhn's explanation of Unicode
       quotation marks for more information.
     * The  specs  file  is  no  longer installed on most platforms. Most
       users  will  be totally unaffected. However, if you are accustomed
       to  editing  the specs file yourself, you will now have to use the
       -dumpspecs  option  to  generate the specs file, and then edit the
       resulting file.

General Optimizer Improvements

     * The  [3]tree ssa branch has been merged. This merge has brought in
       a  completely  new  optimization framework based on a higher level
       intermediate  representation than the existing RTL representation.
       Numerous  new  code transformations based on the new framework are
       available in GCC 4.0, including:
          + Scalar replacement of aggregates
          + Constant propagation
          + Value range propagation
          + Partial redundancy elimination
          + Load and store motion
          + Strength reduction
          + Dead store elimination
          + Dead and unreachable code elimination
          + [4]Autovectorization
          + Loop interchange
          + Tail recursion by accumulation
       Many  of  these passes outperform their counterparts from previous
       GCC releases.
     * [5]Swing   Modulo  Scheduling  (SMS).  An  RTL  level  instruction
       scheduling  optimization  intended  for  loops  that perform heavy
       computations.

New Languages and Language specific improvements

  C family

     * The  sentinel  attribute  has  been  added  to  GCC. This function
       attribute allows GCC to warn when variadic functions such as execl
       are  not  NULL  terminated.  See  the  GCC  manual  for a complete
       description of its behavior.
     * Given  __attribute__((alias("target")))  it  is  now  an  error if
       target is not a symbol, defined in the same translation unit. This
       also applies to aliases created by #pragma weak alias=target. This
       is  because  it's  meaningless  to define an alias to an undefined
       symbol.  On  Solaris,  the native assembler would have caught this
       error, but GNU as does not.

  C and Objective-C

     * The  -Wstrict-aliasing=2  option  has  been  added.  This  warning
       catches  all unsafe cases, but it may also give a warning for some
       cases that are safe.
     * The     cast-as-lvalue,    conditional-expression-as-lvalue    and
       compound-expression-as-lvalue extensions, which were deprecated in
       3.3.4 and 3.4, have been removed.
     * The  -fwritable-strings  option,  which was deprecated in 3.4, has
       been removed.
     * #pragma pack() semantics have been brought closer to those used by
       other compilers. This also applies to C++.
     * Taking  the address of a variable with register storage is invalid
       in C. GCC now issues an error instead of a warning.
     * Arrays of incomplete element type are invalid in C. GCC now issues
       an  error  for  such  arrays. Declarations such as extern struct s
       x[];  (where struct s has not been defined) can be moved after the
       definition  of struct s. Function parameters declared as arrays of
       incomplete type can instead be declared as pointers.

  C++

     * When  compiling  without  optimizations (-O0), the C++ frontend is
       much  faster  than  in  any  previous versions of GCC. Independent
       testers have measured speed-ups up to 25% in real-world production
       code,  compared  to  the 3.4 family (which was already the fastest
       version  to  date).  Upgrading from older versions might show even
       bigger improvements.
     * ELF  visibility  attributes can now be applied to a class type, so
       that  it affects every member function of a class at once, without
       having to specify each individually:
class __attribute__ ((visibility("hidden"))) Foo
{
   int foo1();
   void foo2();
};
       The syntax is deliberately similar to the __declspec() system used
       by  Microsoft  Windows  based  compilers,  allowing cross-platform
       projects  to easily reuse their existing macro system for denoting
       exports  and imports. By explicitly marking internal classes never
       used  outside  a  binary  as  hidden, one can completely avoid PLT
       indirection  overheads during their usage by the compiler. You can
       find    out    more    about    the    advantages   of   this   at
       [6]http://people.redhat.com/drepper/dsohowto.pdf
     * The  -fvisibility-inlines-hidden option has been added which marks
       all  inlineable  functions  as  having hidden ELF visibility, thus
       removing  their symbol and typeinfo from the exported symbol table
       of  the  output  ELF  binary.  Using  this  option  can reduce the
       exported  symbol count of template-heavy code by up to 40% with no
       code change at all, thus notably improving link and load times for
       the  binary  as  well  as  a reduction in size of up to 10%. Also,
       check the new [7]-fvisibility option.
     * The  compiler  now  uses  the  library  interface specified by the
       [8]C++ ABI for thread-safe initialization of function-scope static
       variables.  Most  users  should  leave  this  alone,  but embedded
       programmers    may    want   to   disable   this   by   specifying
       -fno-threadsafe-statics for a small savings in code size.
     * Taking  the  address of an explicit register variable is no longer
       supported.  Note  that  C++ allows taking the address of variables
       with  register  storage  so  this  will continue to compile with a
       warning. For example, assuming that r0 is a machine register:
register int foo asm ("r0");
register int bar;
&foo; // error, no longer accepted
&bar; // OK, with a warning
     * G++  has  an undocumented extension to virtual function covariancy
       rules  that  allowed  the  overrider  to  return  a  type that was
       implicitly  convertable  to the overridden function's return type.
       For  instance a function returning void * could be overridden by a
       function returning T *. This is now deprecated and will be removed
       in a future release.
     * The  G++  minimum  and  maximum  operators  (<?  and >?) and their
       compound  forms  (<?=)  and  >?=) have been deprecated and will be
       removed  in a future version. Code using these operators should be
       modified to use std::min and std::max instead.
     * Declaration  of  nested  classes of class templates as friends are
       supported:
template <typename T> struct A {
  class B {};
};
class C {
  template <typename T> friend class A<T>::B;
};
       This  complements  the feature member functions of class templates
       as friends introduced in GCC 3.4.0.
     * When  declaring  a friend class using an unqualified name, classes
       outside the innermost non-class scope are not searched:
class A;
namespace N {
  class B {
    friend class A;   // Refer to N::A which has not been declared yet
                      // because name outside namespace N are not searched
    friend class ::A; // Refer to ::A
  };
}
       Hiding the friend name until declaration is still not implemented.
     * Friends  of  classes defined outside their namespace are correctly
       handled:
namespace N {
  class A;
}
class N::A {
  friend class B; // Refer to N::B in GCC 4.0.0
                  // but ::B in earlier versions of GCC
};

    Runtime Library (libstdc++)

     * Optimization work:
          + Added efficient specializations of istream functions for char
            and wchar_t.
          + Further  performance  tuning  of  strings,  in particular wrt
            single-char append and getline.
          + iter_swap  -  and therefore most of the mutating algorithms -
            now  makes an unqualified call to swap when the value_type of
            the two iterators is the same.
     * A  large  subset  of  the  features in Technical Report 1 (TR1 for
       short)  is experimentally delivered (i.e., no guarantees about the
       implementation are provided. In particular it is not promised that
       the  library  will  remain  link-compatible when code using TR1 is
       used):
          + General utilities such as reference_wrapper and shared_ptr.
          + Function objects, i.e., result_of, mem_fn, bind, function.
          + Support for metaprogramming.
          + New   containers   such   as   tuple,  array,  unordered_set,
            unordered_map, unordered_multiset, unordered_multimap.
     * As   usual,   many  bugs  have  been  fixed  and  LWG  resolutions
       implemented for the first time (e.g., DR 409).

  Java

     * In order to prevent naming conflicts with other implementations of
       these tools, some GCJ binaries have been renamed:
          + rmic is now grmic,
          + rmiregistry is now grmiregistry, and
          + jar is now fastjar.
       In  particular,  these names were problematic for the jpackage.org
       packaging  conventions  which  install  symlinks  in /usr/bin that
       point to the preferred versions of these tools.
     * The  -findirect-dispatch  argument  to  the compiler now works and
       generates  code  following  a new "binary compatibility" ABI. Code
       compiled  this  way  follows the binary compatibility rules of the
       Java Language Specification.
     * libgcj  now  has  support  for  using  GCJ  as  a  JIT,  using the
       gnu.gcj.jit family of system properties.
     * libgcj can now find a shared library corresponding to the bytecode
       representation  of  a  class.  See  the  documentation for the new
       gcj-dbtool program, and the new gnu.gcj.precompiled.db.path system
       property.
     * There  have  been many improvements to the class library. Here are
       some highlights:
          + Much more of AWT and Swing exist.
          + Many   new   packages   and  classes  were  added,  including
            java.util.regex,          java.net.URI,         javax.crypto,
            javax.crypto.interfaces,     javax.crypto.spec,    javax.net,
            javax.net.ssl, javax.security.auth,
            javax.security.auth.callback,      javax.security.auth.login,
            javax.security.auth.x500, javax.security.sasl, org.ietf.jgss,
            javax.imageio,     javax.imageio.event,    javax.imageio.spi,
            javax.print, javax.print.attribute,
            javax.print.attribute.standard,     javax.print.event,    and
            javax.xml
          + Updated SAX and DOM, and imported GNU JAXP

  Fortran

     * A  new  [9]Fortran front end has replaced the aging GNU Fortran 77
       front  end.  The new front end supports Fortran 90 and Fortran 95.
       It may not yet be as stable as the old Fortran front end.

  Ada

     * Ada  (with  tasking  and Zero Cost Exceptions) is now available on
       many  more  targets,  including  but  not limited to: alpha-linux,
       hppa-hpux,  hppa-linux, powerpc-darwin, powerpc-linux, s390-linux,
       s390x-linux, sparc-linux.
     * Some  of  the  new  Ada  2005  features  are  now implemented like
       Wide_Wide_Character and Ada.Containers.
     * Many bugs have been fixed, tools and documentation improved.
     * To  compile  Ada  from  the  sources, install an older working Ada
       compiler  and  then  use  --enable-languages=ada  at configuration
       time,  since  the  Ada  frontend  is  not  currently  activated by
       default. See the [10]Installing GCC for details.

New Targets and Target Specific Improvements

  H8/300

     * The frame layout has changed. In the new layout, the prologue of a
       function first saves registers and then allocate space for locals,
       resulting in an 1% improvement on code size.

  IA-32/x86-64 (AMD64)

     * The  acos,  asin,  drem,  exp10,  exp2, expm1, fmod, ilogb, log10,
       log1p,  log2,  logb and tan mathematical builtins (and their float
       and  long  double  variants)  are  now  implemented  as inline x87
       intrinsics when using -ffast-math.
     * The  ceil,  floor, nearbyint, rint and trunc mathematical builtins
       (and  their float and long double variants) are now implemented as
       inline x87 intrinsics when using -ffast-math.
     * The  x87's  fsincos  instruction  is  now  used automatically with
       -ffast-math  when  calculating  both  the  sin and cos of the same
       argument.
     * Instruction selection for multiplication and division by constants
       has been improved.

  IA-64

     * Floating  point  division,  integer  division  and  sqrt  are  now
       inlined, resulting in significant performance improvements on some
       codes.

  MIPS

     * Division  by  zero  checks now use conditional traps if the target
       processor  supports them. This decreases code size by one word per
       division  operation.  The  old  behavior (branch and break) can be
       obtained  either at configure time by passing --with-divide=breaks
       to configure or at runtime by passing -mdivide-breaks to GCC.
     * Support  for  MIPS64 paired-single instructions has been added. It
       is  enabled  by -mpaired-single and can be accessed using both the
       target-independent   vector   extensions   and  new  MIPS-specific
       built-in functions.
     * Support  for  the  MIPS-3D  ASE  has  been added. It is enabled by
       -mips3d and provides new MIPS-3D-specific built-in functions.
     * The  -mexplicit-relocs  option now supports static n64 code (as is
       used,  for  example,  in  64-bit linux kernels). -mexplicit-relocs
       should  now be feature-complete and is enabled by default when GCC
       is configured to use a compatible assembler.
     * Support  for  the  NEC  VR4130 series has been added. This support
       includes  the  use  of  VR-specific  instructions and a new VR4130
       scheduler.  Full VR4130 support can be selected with -march=vr4130
       while  code  for  any  ISA  can  be  tuned  for  the  VR4130 using
       -mtune=vr4130.  There  is  also  a  new -mvr4130-align option that
       produces better schedules at the cost of increased code size.
     * Support  for  the Broadcom SB-1 has been extended. There is now an
       SB-1   scheduler   as   well  as  support  for  the  SB-1-specific
       paired-single instructions. Full SB-1 support can be selected with
       -march=sb1  while  code  for any ISA can be optimized for the SB-1
       using -mtune=sb1.
     * The  compiler  can  now work around errata in R4000, R4400, VR4120
       and   VR4130   processors.   These   workarounds  are  enabled  by
       -mfix-r4000,    -mfix-r4400,    -mfix-vr4120    and   -mfix-vr4130
       respectively. The VR4120 and VR4130 workarounds need binutils 2.16
       or above.
     * IRIX  shared libraries are now installed into the standard library
       directories:  o32  libraries  go  into lib/, n32 libraries go into
       lib32/ and n64 libraries go into lib64/.
     * The  compiler  supports  a  new  -msym32 option. It can be used to
       optimize  n64  code  in which all symbols are known to have 32-bit
       values.

  S/390 and zSeries

     * New  command line options help to generate code intended to run in
       an  environment where stack space is restricted, e.g. Linux kernel
       code:
          + -mwarn-framesize and -mwarn-dynamicstack trigger compile-time
            warnings  for  single functions that require large or dynamic
            stack frames.
          + -mstack-size  and -mstack-guard generate code that checks for
            stack overflow at run time.
          + -mpacked-stack  generates  code  that reduces the stack frame
            size of many functions by reusing unneeded parts of the stack
            bias area.
     * The  -msoft-float  option  now  ensures  that generated code never
       accesses floating point registers.
     * The   s390x-ibm-tpf  target  now  fully  supports  C++,  including
       exceptions and threads.
     * Various  changes to improve performance of the generated code have
       been implemented, including:
          + GCC now uses sibling calls where possible.
          + Condition  code  handling has been optimized, allowing GCC to
            omit redundant comparisons in certain cases.
          + The cost function guiding many optimizations has been refined
            to more accurately represent the z900 and z990 processors.
          + The  ADD  LOGICAL WITH CARRY and SUBTRACT LOGICAL WITH BORROW
            instructions  are  now  used to avoid conditional branches in
            certain cases.
          + The  back  end now uses the LEGITIMIZE_RELOAD_ADDRESS feature
            to optimize address arithmetic required to access large stack
            frames.
          + GCC  now  makes  more  efficient use of memory-to-memory type
            instructions (MVC, CLC, ...).
          + More  precise  tracking of special register use allows better
            instruction   scheduling,   in  particular  of  the  function
            prologue and epilogue sequences.
          + The  Java  front  end  now generates inline code to implement
            integer division, instead of calling library routines.

  SPARC

     * The options -mv8, -msparclite, -mcypress, -msupersparc, -mf930 and
       -mf934 have been removed. They have been replaced with -mcpu=xxx.
     * The  internal  model  used  to  estimate the relative cost of each
       instruction  has  been  updated.  It  is  expected  to give better
       results on recent UltraSPARC processors.
     * Code  generation  for  function  prologues  and epilogues has been
       improved,  resulting  in  better  scheduling and allowing multiple
       exit points in functions.
     * Support  for Sun's Visual Instruction Set (VIS) has been enhanced.
       It is enabled by -mvis and provides new built-in functions for VIS
       instructions on UltraSPARC processors.
     * The  option  -mapp-regs  has  been turned on by default on Solaris
       too.

  NetWare

     * Novell  NetWare  (on  ix86,  no  other  hardware platform was ever
       really  supported  by  this  OS)  has  been re-enabled and the ABI
       supported  by  GCC  has  been  brought  into  sync  with  that  of
       MetroWerks  CodeWarrior  (the ABI previously supported was that of
       some Unix systems, which NetWare never tried to support).

Obsolete Systems

   Support  for  a  number of older systems has been declared obsolete in
   GCC  4.0. Unless there is activity to revive them, the next release of
   GCC will have their sources permanently removed.

   All  GCC  ports  for  the  following processor architectures have been
   declared obsolete:
     * Intel i860
     * Ubicom IP2022
     * National Semiconductor NS32K
     * Texas Instruments TMS320C[34]x

   Also, those for some individual systems have been obsoleted:
     * SPARC family
          + SPARClite-based  systems  (sparclite-*-coff, sparclite-*-elf,
            sparc86x-*-elf)
          + OpenBSD 32-bit (sparc-*-openbsd*)

Documentation improvements

Other significant improvements

     * Location  lists  are  now generated by default when compiling with
       debug  info and optimization. Location lists provide more accurate
       debug  info  about locations of variables and they allow debugging
       code compiled with -fomit-frame-pointer.
     * The  -fvisibility  option  has been added which allows the default
       ELF  visibility  of  all symbols to be set per compilation and the
       new #pragma GCC visibility preprocessor command allows the setting
       of   default   ELF   visibility   for  a  region  of  code.  Using
       -fvisibility=hidden   especially   in  combination  with  the  new
       -fvisibility-inlines-hidden  can yield substantial improvements in
       output   binary   quality   including   avoiding  PLT  indirection
       overheads,  reduction  of  the  exported symbol count by up to 60%
       (with resultant improvements to link and load times), better scope
       for  the  optimizer  to  improve code and up to a 20% reduction in
       binary  size. Using these options correctly yields a binary with a
       similar symbol count to a Windows DLL.
       Perhaps  more  importantly,  this new feature finally allows (with
       careful  planning)  complete  avoidance  of  symbol  clashes  when
       manually  loading  shared  objects  with RTLD_GLOBAL, thus finally
       solving  problems  many projects such as python were forced to use
       RTLD_LOCAL  for  (with  its resulting issues for C++ correctness).
       You  can  find  more  information  about  using  these  options at
       [11]http://gcc.gnu.org/wiki/Visibility.
     _________________________________________________________________

GCC 4.0.1

   This  is the [12]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 4.0.1 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

GCC 4.0.2

   This  is the [13]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 4.0.2 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

   Unfortunately,  due to a release engineering failure, this release has
   a regression on Solaris that will affect some C++ programs. We suggest
   that  Solaris users apply a [14]patch that corrects the problem. Users
   who do not wish to apply the patch should explicitly link C++ programs
   with  the  -pthreads  option,  even  if  they do not use threads. This
   problem  has been corrected in the current 4.0 branch sources and will
   not be present in GCC 4.0.3.

GCC 4.0.3

   Starting  with  this release, the function getcontext is recognized by
   the  compiler  as having the same semantics as the setjmp function. In
   particular,  the  compiler  will  ensure  that  all registers are dead
   before  calling  such  a  function  and  will emit a warning about the
   variables  that  may  be  clobbered  after  the second return from the
   function.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [15]gnu@gnu.org. There
   are also [16]other ways to contact the FSF.

   These pages are maintained by [17]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [18]GCC   manuals.   If   that   fails,   the
    [19]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [20]gcc@gnu.org   or
    [21]gcc@gcc.gnu.org. All of our lists have [22]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-11-11 [23]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
   2. http://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
   3. http://gcc.gnu.org/projects/tree-ssa/
   4. http://gcc.gnu.org/projects/tree-ssa/vectorization.html
   5. http://gcc.gnu.org/news/sms.html
   6. http://people.redhat.com/drepper/dsohowto.pdf
   7. http://gcc.gnu.org/gcc-4.0/changes.html#visibility
   8. http://www.codesourcery.com/cxx-abi/
   9. http://gcc.gnu.org/fortran/
  10. http://gcc.gnu.org/install/
  11. http://gcc.gnu.org/wiki/Visibility
  12. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.0.1
  13. http://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.0.2
  14. http://gcc.gnu.org/ml/gcc-cvs/2005-09/msg00984.html
  15. mailto:gnu@gnu.org
  16. http://www.gnu.org/home.html#ContactInfo
  17. http://gcc.gnu.org/about.html
  18. http://gcc.gnu.org/onlinedocs/
  19. mailto:gcc-help@gcc.gnu.org
  20. mailto:gcc@gnu.org
  21. mailto:gcc@gcc.gnu.org
  22. http://gcc.gnu.org/lists.html
  23. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/index.html

                           GCC 3.4 Release Series

   November 30, 2005

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.5.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.4.4 relative to previous releases of GCC.

   May 18, 2005

   The  [2]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.4.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.4.3 relative to previous releases of GCC.

   November 4, 2004

   The  [3]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.3.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.4.2 relative to previous releases of GCC.

   September 6, 2004

   The  [4]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.2.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.4.1 relative to previous releases of GCC.

   July 1, 2004

   The  [5]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.1.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.4.0 relative to previous releases of GCC.

   April 18, 2004

   The  [6]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.4.0.

   The   GCC  3.4  release  series  includes  numerous  [7]new  features,
   improvements,  bug  fixes,  and other changes, thanks to an [8]amazing
   group of volunteers.

Release History

   GCC 3.4.5
          November 30, 2005 ([9]changes)

   GCC 3.4.4
          May 18, 2005 ([10]changes)

   GCC 3.4.3
          November 4, 2004 ([11]changes)

   GCC 3.4.2
          September 6, 2004 ([12]changes)

   GCC 3.4.1
          July 1, 2004 ([13]changes)

   GCC 3.4.0
          April 18, 2004 ([14]changes)

References and Acknowledgements

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list of [15]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features, improvements, bug fixes, and other changes
   as  well  as test results to GCC. This [16]amazing group of volunteers
   is what makes GCC successful.

   For  additional  information  about  GCC  please  refer to the [17]GCC
   project web site or contact the [18]GCC development mailing list.

   To  obtain  GCC  please  use  [19]our mirror sites, one of the [20]GNU
   mirror sites, or [21]our CVS server.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [22]gnu@gnu.org. There
   are also [23]other ways to contact the FSF.

   These pages are maintained by [24]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [25]GCC   manuals.   If   that   fails,   the
    [26]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [27]gcc@gnu.org   or
    [28]gcc@gcc.gnu.org. All of our lists have [29]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2006-01-18 [30]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://www.gnu.org/
   3. http://www.gnu.org/
   4. http://www.gnu.org/
   5. http://www.gnu.org/
   6. http://www.gnu.org/
   7. http://gcc.gnu.org/gcc-3.4/changes.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.5
  10. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.4
  11. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.3
  12. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.2
  13. http://gcc.gnu.org/gcc-3.4/changes.html#3.4.1
  14. http://gcc.gnu.org/gcc-3.4/changes.html
  15. http://gcc.gnu.org/gcc-3.4/buildstat.html
  16. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
  17. http://gcc.gnu.org/index.html
  18. mailto:gcc@gcc.gnu.org
  19. http://gcc.gnu.org/mirrors.html
  20. http://www.gnu.org/order/ftp.html
  21. http://gcc.gnu.org/cvs.html
  22. mailto:gnu@gnu.org
  23. http://www.gnu.org/home.html#ContactInfo
  24. http://gcc.gnu.org/about.html
  25. http://gcc.gnu.org/onlinedocs/
  26. mailto:gcc-help@gcc.gnu.org
  27. mailto:gcc@gnu.org
  28. mailto:gcc@gcc.gnu.org
  29. http://gcc.gnu.org/lists.html
  30. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.4/changes.html

                           GCC 3.4 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 3.4 release series is [1]GCC 3.4.5.

   GCC 3.4 has [2]many improvements in the C++ frontend. Before reporting
   a  bug,  please  make sure it's really GCC, and not your code, that is
   broken.

Caveats

     * GNU Make is now required to build GCC.
     * With  -nostdinc  the  preprocessor  used  to  ignore both standard
       include   paths   and   include  paths  contained  in  environment
       variables. It was neither documented nor intended that environment
       variable paths be ignored, so this has been corrected.
     * GCC  no  longer  accepts the options -fvolatile, -fvolatile-global
       and  -fvolatile-static.  It is unlikely that they worked correctly
       in any 3.x release.
     * GCC no longer ships <varargs.h>. Use <stdarg.h> instead.
     * Support  for  all  the  systems  [3]obsoleted  in GCC 3.3 has been
       removed from GCC 3.4. See below for a [4]list of systems which are
       obsoleted in this release.
     * GCC  now requires an ISO C90 (ANSI C89) C compiler to build. K&R C
       compilers will not work.
     * The  implementation  of the [5]MIPS ABIs has changed. As a result,
       the  code  generated  for  certain MIPS targets will not be binary
       compatible with earlier releases.
     * In  previous  releases,  the  MIPS port had a fake "hilo" register
       with the user-visible name accum. This register has been removed.
     * The  implementation of the [6]SPARC ABIs has changed. As a result,
       the  code  generated  will  not  be binary compatible with earlier
       releases in certain cases.
     * The  configure  option --enable-threads=pthreads has been removed;
       use  --enable-threads=posix  instead,  which  should have the same
       effect.
     * Code   size   estimates   used   by  inlining  heuristics  for  C,
       Objective-C, C++ and Java have been redesigned significantly. As a
       result     the     parameters     of    -finline-insns,    --param
       max-inline-insns-single  and --param max-inline-insns-auto need to
       be reconsidered.
     * --param  max-inline-slope  and  --param min-inline-insns have been
       removed;  they  are  not  needed  for  the  new bottom-up inlining
       heuristics.
     * The    new   unit-at-a-time   compilation   scheme   has   several
       compatibility issues:
          + The  order  in  which functions, variables, and top-level asm
            statements are emitted may have changed. Code relying on some
            particular ordering needs to be updated. The majority of such
            top-level   asm   statements   can  be  replaced  by  section
            attributes.
          + Unreferenced static variables and functions are removed. This
            may  result  in  undefined  references  when an asm statement
            refers to the variable/function directly. In that case either
            the  variable/function  shall  be  listed  in  asm  statement
            operand  or  in  the  case  of  top-level  asm statements the
            attribute used shall be used to force function/variable to be
            always  output  and  considered as a possibly used by unknown
            code.
            For  variables  the attribute is accepted only by GCC 3.4 and
            newer,  while  for  earlier  versions it is sufficient to use
            unused  to  silence  warnings  about  the variables not being
            referenced.  To  keep  code  portable  across  different  GCC
            versions, you can use appropriate preprocessor conditionals.
          + Static functions now can use non-standard passing conventions
            that  may  break  asm  statements calling functions directly.
            Again  the  attribute  used  shall  be  used  to prevent this
            behavior.
       As  a  temporary  workaround, -fno-unit-at-a-time can be used, but
       this scheme may not be supported by future releases of GCC.
     * GCC  3.4  automatically  places  zero-initialized variables in the
       .bss  section  on some operating systems. Versions of GNU Emacs up
       to  (and  including)  21.3 will not work correctly when using this
       optimization;  you can use -fno-zero-initialized-in-bss to disable
       it.
     * If  GCC 3.4 is configured with --enable-threads=posix (the default
       on  most  targets  that  support pthreads) then _REENTRANT will be
       defined  unconditionally by some libstdc++ headers. C++ code which
       relies  on  that  macro  to  detect whether multi-threaded code is
       being  compiled  might  change  in  meaning, possibly resulting in
       linker  errors  for  single-threaded  programs.  Affected users of
       [7]Boost     should     compile    single-threaded    code    with
       -DBOOST_DISABLE_THREADS. See Bugzilla for [8]more information.

General Optimizer Improvements

     * Usability  of  the  profile feedback and coverage testing has been
       improved.
          + Performance  of profiled programs has been improved by faster
            profile merging code.
          + Better  use  of  the  profile feedback for optimization (loop
            unrolling and loop peeling).
          + File  locking support allowing fork() calls and parallel runs
            of profiled programs.
          + Coverage file format has been redesigned.
          + gcov coverage tool has been improved.
          + make profiledbootstrap available to build a faster compiler.
            Experiments  made  on  i386 hardware showed an 11% speedup on
            -O0  and  a 7.5% speedup on -O2 compilation of a [9]large C++
            testcase.
          + New value profiling pass enabled via -fprofile-values
          + New value profile transformations pass enabled via -fvpt aims
            to optimize some code sequences by exploiting knowledge about
            value  ranges  or  other  properties  of the operands. At the
            moment  a  conversion  of  expensive  divisions  into cheaper
            operations has been implemented.
          + New -fprofile-generate and -fprofile-use command line options
            to simplify the use of profile feedback.
     * A  new  unit-at-a-time  compilation scheme for C, Objective-C, C++
       and  Java  which  is  enabled via -funit-at-a-time (and implied by
       -O2).  In  this  scheme a whole file is parsed first and optimized
       later.  The  following  basic  inter-procedural  optimizations are
       implemented:
          + Removal of unreachable functions and variables
          + Discovery  of  local functions (functions with static linkage
            whose address is never taken)
          + On i386, these local functions use register parameter passing
            conventions.
          + Reordering  of  functions  in  topological  order of the call
            graph  to enable better propagation of optimizing hints (such
            as the stack alignments needed by functions) in the back end.
          + Call  graph  based  out-of-order  inlining  heuristics  which
            allows  to  limit  overall  compilation  unit growth (--param
            inline-unit-growth).
       Overall, the unit-at-a-time scheme produces a 1.3% improvement for
       the  SPECint2000  benchmark  on  the i386 architecture (AMD Athlon
       CPU).
     * More  realistic  code  size  estimates  used  by  inlining  for C,
       Objective-C,  C++  and Java. The growth of large functions can now
       be   limited   via   --param   large-function-insns   and  --param
       large-function-growth.
     * A  new  cfg-level  loop  optimizer  pass  replaces  the  old  loop
       unrolling  pass  and  adds  two other loop transformations -- loop
       peeling and loop unswitching -- and also uses the profile feedback
       to  limit  code  growth.  (The  three optimizations are enabled by
       -funroll-loops,    -fpeel-loops    and   -funswitch-loops   flags,
       respectively).
       The  old  loop unroller still can be enabled by -fold-unroll-loops
       and  may  produce  better  code in some cases, especially when the
       webizer optimization pass is not run.
     * A new web construction pass enabled via -fweb (and implied by -O3)
       improves the quality of register allocation, CSE, first scheduling
       pass  and  some  other  optimization  passes by avoiding re-use of
       pseudo registers with non-overlapping live ranges. The pass almost
       always improves code quality but does make debugging difficult and
       thus is not enabled by default by -O2
       The pass is especially effective as cleanup after code duplication
       passes, such as the loop unroller or the tracer.
     * Experimental  implementations of superblock or trace scheduling in
       the    second    scheduling    pass    can    be    enabled    via
       -fsched2-use-superblocks and -fsched2-use-traces, respectively.

New Languages and Language specific improvements

  Ada

     * The  Ada  front end has been updated to include numerous bug fixes
       and enhancements. These include:
          + Improved project file support
          + Additional set of warnings about potential wrong code
          + Improved error messages
          + Improved code generation
          + Improved cross reference information
          + Improved inlining
          + Better run-time check elimination
          + Better error recovery
          + More efficient implementation of unbounded strings
          + Added      features     in     GNAT.Sockets,     GNAT.OS_Lib,
            GNAT.Debug_Pools, ...
          + New      GNAT.xxxx      packages      (e.g.     GNAT.Strings,
            GNAT.Exception_Action)
          + New pragmas
          + New -gnatS switch replacing gnatpsta
          + Implementation  of  new  Ada  features (in particular limited
            with, limited aggregates)

  C/Objective-C/C++

     * Precompiled  headers  are  now  supported. Precompiled headers can
       dramatically speed up compilation of some projects. There are some
       known  defects  in  the  current precompiled header implementation
       that   will   result   in  compiler  crashes  in  relatively  rare
       situations.  Therefore, precompiled headers should be considered a
       "technology  preview" in this release. Read the manual for details
       about how to use precompiled headers.
     * File  handling  in  the  preprocessor  has  been rewritten. GCC no
       longer  gets  confused  by  symlinks  and hardlinks, and now has a
       correct  implementation  of  #import  and  #pragma once. These two
       directives have therefore been un-deprecated.
     * The undocumented extension that allowed C programs to have a label
       at  the  end  of  a  compound statement, which has been deprecated
       since GCC 3.0, has been removed.
     * The   cast-as-lvalue  extension  has  been  removed  for  C++  and
       deprecated for C and Objective-C. In particular, code like this:
        int i;
        (char) i = 5;

       or this:
        char *p;
        ((int *) p)++;

       is  no  longer accepted for C++ and will not be accepted for C and
       Objective-C in a future version.
     * The conditional-expression-as-lvalue extension has been deprecated
       for C and Objective-C. In particular, code like this:
        int a, b, c;
        (a ? b : c) = 2;

       will not be accepted for C and Objective-C in a future version.
     * The  compound-expression-as-lvalue  extension  has been deprecated
       for C and Objective-C. In particular, code like this:
        int a, b;
        (a, b) = 2;

       will  not be accepted for C and Objective-C in a future version. A
       possible non-intrusive workaround is the following:
        (*(a, &b)) = 2;

     * Several  [10]built-in  functions  such  as  __builtin_popcount for
       counting  bits,  finding the highest and lowest bit in a word, and
       parity have been added.
     * The  -fwritable-strings  option  has  been  deprecated and will be
       removed.
     * Many  C math library functions are now recognized as built-ins and
       optimized.
     * The  C, C++, and Objective-C compilers can now handle source files
       written in any character encoding supported by the host C library.
       The  default input character set is taken from the current locale,
       and  may  be  overridden  with  the  -finput-charset  command line
       option.  In  the  future  we  will add support for inline encoding
       markers.

  C++

     * G++  is  now  much  closer to full conformance to the ISO/ANSI C++
       standard.  This  means,  among other things, that a lot of invalid
       constructs which used to be accepted in previous versions will now
       be rejected. It is very likely that existing C++ code will need to
       be fixed. This document lists some of the most common issues.
     * A  hand-written  recursive-descent  C++  parser  has  replaced the
       YACC-derived C++ parser from previous GCC releases. The new parser
       contains much improved infrastructure needed for better parsing of
       C++  source  codes,  handling  of extensions, and clean separation
       (where  possible)  between  proper semantics analysis and parsing.
       The new parser fixes many bugs that were found in the old parser.
     * You   must   now   use  the  typename  and  template  keywords  to
       disambiguate dependent names, as required by the C++ standard.
        struct K {
          typedef int mytype_t;
        };

        template <class T1> struct A {
          template <class T2> struct B {
              void callme(void);
            };

          template <int N> void bar(void)
          {
            // Use 'typename' to tell the parser that T1::mytype_t names
            //  a type. This is needed because the name is dependent (in
            //  this case, on template parameter T1).
            typename T1::mytype_t x;
            x = 0;
          }
        };

        template <class T> void template_func(void)
        {
          // Use 'template' to prefix member templates within
          //  dependent types (a has type A<T>, which depends on
          //  the template parameter T).
          A<T> a;
          a.template bar<0>();

          // Use 'template' to tell the parser that B is a nested
          //  template class (dependent on template parameter T), and
          //  'typename' because the whole A<T>::B<int> is
          //  the name of a type (again, dependent).
          typename A<T>::template B<int> b;
          b.callme();
        }

        void non_template_func(void)
        {
          // Outside of any template class or function, no names can be
          //  dependent, so the use of the keyword 'typename' and 'template'
          //  is not needed (and actually forbidden).
          A<K> a;
          a.bar<0>();
          A<K>::B<float> b;
          b.callme();
        }
     * In  a  template  definition, unqualified names will no longer find
       members  of  a dependent base (as specified by [temp.dep]/3 in the
       C++ standard). For example,
        template <typename T> struct B {
          int m;
          int n;
          int f ();
          int g ();
        };
        int n;
        int g ();
        template <typename T> struct C : B<T> {
          void h ()
          {
            m = 0; // error
            f ();  // error
            n = 0; // ::n is modified
            g ();  // ::g is called
          }
        };
       You  must  make  the  names dependent, e.g. by prefixing them with
       this->. Here is the corrected definition of C<T>::h,
        template <typename T> void C<T>::h ()
        {
          this->m = 0;
          this->f ();
          this->n = 0
          this->g ();
        }
       As an alternative solution (unfortunately not backwards compatible
       with GCC 3.3), you may use using declarations instead of this->:
        template <typename T> struct C : B<T> {
          using B<T>::m;
          using B<T>::f;
          using B<T>::n;
          using B<T>::g;
          void h ()
          {
            m = 0;
            f ();
            n = 0;
            g ();
          }
        };
     * In  templates, all non-dependent names are now looked up and bound
       at definition time (while parsing the code), instead of later when
       the template is instantiated. For instance:
        void foo(int);

        template <int> struct A {
          static void bar(void){
            foo('a');
          }
        };

        void foo(char);

        int main()
        {
          A<0>::bar();    // Calls foo(int), used to call foo(char).
        }
             * In  an  explicit  instantiation  of  a  class  template,  you must
       use class or struct before the template-id:
        template <int N>
        class A {};

        template A<0>;         // error, not accepted anymore
        template class A<0>;   // OK
     * The  "named  return value" and "implicit typename" extensions have
       been removed.
     * Default  arguments in function types have been deprecated and will
       be removed.
     * ARM-style   name-injection   of   friend   declarations  has  been
       deprecated  and  will  be  removed. For example: struct S { friend
       void  f();  };  void  g()  { f(); } will not be accepted by future
       versions  of  G++;  instead  a  declaration of "f" will need to be
       present outside of the scope of "S".
     * Covariant  returns  are  implemented for all but varadic functions
       that require an adjustment.
     * When  -pedantic  is  used,  G++  now  issues errors about spurious
       semicolons. For example,
        namespace N {}; // Invalid semicolon.
        void f() {}; // Invalid semicolon.
     * G++  no  longer  accepts  attributes  for  a  declarator after the
       initializer associated with that declarator. For example,
        X x(1) __attribute__((...));
       is no longer accepted. Instead, use:
        X x __attribute__((...)) (1);
     * Inside the scope of a template class, the name of the class itself
       can  be  treated  as  either a class or a template. So GCC used to
       accept  the  class name as argument of type template, and template
       template  parameter.  However  this is not C++ standard compliant.
       Now  the name is not treated as a valid template template argument
       unless  you  qualify  the name by its scope. For example, the code
       below no longer compiles.
        template <template <class> class TT> class X {};
        template <class T> class Y {
          X<Y> x; // Invalid, Y is always a type template parameter.
        };
       The valid code for the above example is
          X< ::Y> x; // Valid.
       (Notice the space between < and : to prevent GCC to interpret this
       as a digraph for [.)
     * Friend  declarations  that  refer  to template specializations are
       rejected  if  the  template  has  not  already  been declared. For
       example,
        template <typename T>
        class C {
          friend void f<> (C&);
        };
       is rejected. You must first declare f as a template,
        template <typename T>
        void f(T);
     * In  case  of  friend  declarations,  every name used in the friend
       declaration  must  be accessible at the point of that declaration.
       Previous  versions  of  G++  used to be less strict about this and
       allowed   friend  declarations  for  private  class  members,  for
       example.  See  the  ISO C++ Standard Committee's [11]defect report
       #209 for details.
     * Declaration  of member functions of class templates as friends are
       supported. For example,
        template <typename T> struct A {
          void f();
        };
        class C {
          template <typename T> friend void A<T>::f();
        };
     * You must use template <> to introduce template specializations, as
       required by the standard. For example,
        template <typename T>
        struct S;

        struct S<int> { };
       is rejected. You must write,
        template <> struct S<int> {};
     * G++ used to accept code like this,
        struct S {
          int h();
          void f(int i = g());
          int g(int i = h());
        };
       This  behavior  is not mandated by the standard. Now G++ issues an
       error  about  this  code.  To  avoid  the error, you must move the
       declaration  of  g  before  the  declaration  of  f.  The  default
       arguments for g must be visible at the point where it is called.
     * The   C++   ABI   Section   3.3.3  specifications  for  the  array
       construction   routines  __cxa_vec_new2  and  __cxa_vec_new3  were
       changed  to  return NULL when the allocator argument returns NULL.
       These changes are incorporated into the libstdc++ runtime library.
     * Using a name introduced by a typedef in a friend declaration or in
       an explicit instantiation is now rejected, as specified by the ISO
       C++ standard.
        class A;
        typedef A B;
        class C {
          friend class B;      // error, no typedef name here
          friend B;            // error, friend always needs class/struct/enum
          friend class A;      // OK
        };

        template <int> class Q {};
        typedef Q<0> R;
        template class R;      // error, no typedef name here
        template class Q<0>;   // OK
     * When  allocating an array with a new expression, GCC used to allow
       parentheses  around the type name. This is actually ill-formed and
       it is now rejected:
        int* a = new (int)[10];    // error, not accepted anymore
        int* a = new int[10];      // OK
     * When  binding  an  rvalue  of  class type to a reference, the copy
       constructor  of  the  class  must  be  accessible.  For  instance,
       consider the following code:
        class A
        {
        public:
          A();

        private:
          A(const A&);   // private copy ctor
        };

        A makeA(void);
        void foo(const A&);

        void bar(void)
        {
          foo(A());       // error, copy ctor is not accessible
          foo(makeA());   // error, copy ctor is not accessible

          A a1;
          foo(a1);        // OK, a1 is a lvalue
        }
       This  might  be  surprising  at first sight, especially since most
       popular   compilers   do   not   correctly   implement  this  rule
       ([12]further details).
     * When  forming a pointer to member or a pointer to member function,
       access  checks  for  class visibility (public, protected, private)
       are  now  performed using the qualifying scope of the name itself.
       This is better explained with an example:
        class A
        {
        public:
          void pub_func();
        protected:
          void prot_func();
        private:
          void priv_func();
        };

        class B : public A
        {
        public:
          void foo()
          {
            &A::pub_func;   // OK, pub_func is accessible through A
            &A::prot_func;  // error, cannot access prot_func through A
            &A::priv_func;  // error, cannot access priv_func through A

            &B::pub_func;   // OK, pub_func is accessible through B
            &B::prot_func;  // OK, can access prot_func through B (within B)
            &B::priv_func;  // error, cannot access priv_func through B
          }
        };

    Runtime Library (libstdc++)

     * Optimization work:
          + Streamlined  streambuf,  filebuf,  separate  synched  with  C
            Standard I/O streambuf.
          + All formatted I/O now uses cached locale information.
          + STL  optimizations (memory/speed for list, red-black trees as
            used by sets and maps).
          + More use of GCC builtins.
          + String      optimizations      (avoid      contention      on
            increment/decrement-and-test  of  the  reference count in the
            empty-string   object,   constructor   from   input_iterators
            speedup).
     * Static linkage size reductions.
     * Large File Support (files larger than 2 GB on 32-bit systems).
     * Wide   character   and  variable  encoding  filebuf  work  (UTF-8,
       Unicode).
     * Generic character traits.
     * Also  support  wchar_t  specializations  on Mac OS 10.3.x, FreeBSD
       5.x, Solaris 2.7 and above, AIX 5.x, Irix 6.5.
     * The allocator class is now standard-conformant, and two additional
       extension    allocators    have    been    added,   mt_alloc   and
       bitmap_allocator.
     * PCH support: -include bits/stdc++.h (2x compile speedup).
     * Rewrote __cxa_demangle with support for C++ style allocators.
     * New debug modes for STL containers and iterators.
     * Testsuite  rewrite:  five  times  as many tests, plus increasingly
       sophisticated  tests,  including  I/O,  MT, multi-locale, wide and
       narrow characters.
     * Use current versions of GNU "autotools" for build/configuration.

  Objective-C

     * The Objective-C front end has been updated to include the numerous
       bug  fixes  and  enhancements previously available only in Apple's
       version of GCC. These include:
          + Structured exception (@try... @catch... @finally, @throw) and
            synchronization (@synchronized) support. These are accessible
            via  the  -fobjc-exceptions  switch; as of this writing, they
            may only be used in conjunction with -fnext-runtime on Mac OS
            X  10.3  and  later.  See [13]Options Controlling Objective-C
            Dialect for more information.
          + An overhaul of @encode logic. The C99 _Bool and C++ bool type
            may  now be encoded as 'B'. In addition, the back-end/codegen
            dependencies have been removed.
          + An  overhaul  of message dispatch construction, ensuring that
            the  various  receiver  types (and casts thereof) are handled
            properly, and that correct diagnostics are issued.
          + Support  for "Zero-Link" (-fzero-link) and "Fix-and-Continue"
            (-freplace-objc-classes) debugging modes, currently available
            on  Mac  OS  X  10.3  and  later. See [14]Options Controlling
            Objective-C Dialect for more information.
          + Access  to optimized runtime entry points (-fno-nil-receivers
            )  on  the  assumption  that message receivers are never nil.
            This  is  currently available on Mac OS X 10.3 and later. See
            [15]Options   Controlling   Objective-C   Dialect   for  more
            information.

  Java

     * Compiling  a  .jar  file  will  now cause non-.class entries to be
       automatically compiled as resources.
     * libgcj has been ported to Darwin.
     * Jeff  Sturm has adapted Jan Hubicka's call graph optimization code
       to gcj.
     * libgcj  has  a  new gcjlib URL type; this lets URLClassLoader load
       code from shared libraries.
     * libgcj   has   been  much  more  completely  merged  with  [16]GNU
       Classpath.
     * Class loading is now much more correct; in particular the caller's
       class loader is now used when that is required.
     * [17]Eclipse 2.x will run out of the box using gij.
     * Parts  of  java.nio  have  been  implemented.  Direct and indirect
       buffers work, as do fundamental file and socket operations.
     * java.awt  has  been  improved,  though  it  is still not ready for
       general use.
     * The  HTTP  protocol  handler  now uses HTTP/1.1 and can handle the
       POST method.
     * The  MinGW  port  has matured. Enhancements include socket timeout
       support, thread interruption, improved Runtime.exec() handling and
       support for accented characters in filenames.

  Fortran

     * Fortran improvements are listed in the [18]Fortran documentation.

New Targets and Target Specific Improvements

  Alpha

     * Several   [19]built-in   functions   have   been   added  such  as
       __builtin_alpha_zap   to   allow   utilizing   the   more  obscure
       instructions of the CPU.
     * Parameter  passing  of  complex arguments has changed to match the
       [20]ABI.  This  change is incompatible with previous GCC versions,
       but  does  fix  compatibility  with the Tru64 compiler and several
       corner cases where GCC was incompatible with itself.

  ARM

     * Nicolas   Pitre  has  contributed  his  hand-coded  floating-point
       support  code for ARM. It is both significantly smaller and faster
       than  the  existing  C-based  implementation,  even  when building
       applications   for  Thumb.  The  arm-elf  configuration  has  been
       converted to use the new code.
     * Support  for  the Intel's iWMMXt architecture, a second generation
       XScale  processor,  has  been  added. Enabled at run time with the
       -mcpu=iwmmxt command line switch.
     * A  new ARM target has been added: arm-wince-pe. This is similar to
       the arm-pe target, but it defaults to using the APCS32 ABI.
     * The  existing  ARM  pipeline description has been converted to the
       use the [21]DFA processor pipeline model. There is not much change
       in  code  performance,  but  the  description is now [22]easier to
       understand.
     * Support for the Cirrus EP9312 Maverick floating point co-processor
       added.  Enabled  at  run  time  with the -mcpu=ep9312 command line
       switch.  Note  however that the multilibs to support this chip are
       currently  disabled in gcc/config/arm/t-arm-elf, so if you want to
       enable  their production you will have to uncomment the entries in
       that file.

  H8/300

     * Support for long long has been added.
     * Support for saveall attribute has been added.
     * Pavel Pisa contributed hand-written 32-bit-by-32-bit division code
       for  H8/300H  and  H8S,  which  is  much  faster than the previous
       implementation.
     * A lot of small performance improvements.

  IA-32/AMD64 (x86-64)

     * Tuning  for  K8  (AMD  Opteron/Athlon64)  core  is  available  via
       -march=k8 and -mcpu=k8.
     * Scalar   SSE   code   generation   carefully  avoids  reformatting
       penalties,  hidden  dependencies  and minimizes the number of uops
       generated on both Intel and AMD CPUs.
     * Vector MMX and SSE operands are now passed in registers to improve
       performance  and match the argument passing convention used by the
       Intel  C++  Compiler.  As  a  result  it  is  not possible to call
       functions   accepting  vector  arguments  compiled  by  older  GCC
       version.
     * Conditional  jump  elimination  is  now  more aggressive on modern
       CPUs.
     * The  Athlon  ports  has  been  converted  to use the DFA processor
       pipeline description.
     * Optimization  of  indirect tail calls is now possible in a similar
       fashion as direct sibcall optimization.
     * Further small performance improvements.
     * -m128bit-long-double is now less buggy.
     * __float128 support in 64-bit compilation.
     * Support for data structures exceeding 2GB in 64-bit mode.
     * -mcpu has been renamed to -mtune.

  IA-64

     * Tuning  code  for  the  Itanium  2  processor  has been added. The
       generation of code tuned for Itanium 2 (option -mtune=itanium2) is
       enabled  by  default now. To generate code tuned for Itanium 1 the
       option -mtune=itanium1 should be used.
     * [23]DFA  processor  pipeline descriptions for the IA-64 processors
       have  been  added.  This  resulted  in about 3% improvement on the
       SPECInt2000 benchmark for Itanium 2.
     * Instruction  bundling  for the IA-64 processors has been rewritten
       using the DFA pipeline hazard recognizer. It resulted in about 60%
       compiler speedup on the SPECInt2000 C programs.

  M32R

     * Support for the M32R/2 processor has been added by Renesas.
     * Support  for an M32R Linux target and PIC code generation has been
       added by Renesas.

  M68000

     * Bernardo    Innocenti   (Develer S.r.l.)   has   contributed   the
       m68k-uclinux  target,  based  on  former  work  done  by Paul Dale
       (SnapGear Inc.).  Code  generation  for  the  ColdFire  processors
       family  has been enhanced and extended to support the MCF 53xx and
       MCF 54xx  cores,  integrating  former  work  done  by Peter Barada
       (Motorola).

  MIPS

    Processor-specific changes

     * Support  for  the  RM7000 and RM9000 processors has been added. It
       can  be  selected using the -march compiler option and should work
       with any MIPS I (mips-*) or MIPS III (mips64-*) configuration.
     * Support for revision 2 of the MIPS32 ISA has been added. It can be
       selected with the command-line option -march=mips32r2.
     * There  is  a  new  option,  -mfix-sb1, to work around certain SB-1
       errata.

    Configuration

     * It is possible to customize GCC using the following configure-time
       options:
          + --with-arch,  which specifies the default value of the -march
            option.
          + --with-tune,  which specifies the default value of the -mtune
            option.
          + --with-abi, which specifies the default ABI.
          + --with-float=soft,  which  tells GCC to use software floating
            point by default.
          + --with-float=hard,  which  tells GCC to use hardware floating
            point by default.
     * A   64-bit   GNU/Linux   port   has  been  added.  The  associated
       configurations are mips64-linux-gnu and mips64el-linux-gnu.
     * The 32-bit GNU/Linux port now supports Java.
     * The  IRIX  6 configuration now supports the o32 ABI and will build
       o32  multilibs  by  default.  This support is compatible with both
       binutils  and  the  SGI  tools,  but  note  that several features,
       including debugging information and DWARF2 exception handling, are
       only  available  when  using  the  GNU  assembler.  Use of the GNU
       assembler   and   linker  (version  2.15  or  above)  is  strongly
       recommended.
     * The IRIX 6 configuration now supports 128-bit long doubles.
     * There  are  two  new RTEMS-specific configurations, mips-rtems and
       mipsel-rtems.
     * There  are  two  new  *-elf  configurations,  mipsisa32r2-elf  and
       mipsisa32r2el-elf.

    General

     * Several [24]ABI bugs have been fixed. Unfortunately, these changes
       will break binary compatibility with earlier releases.
     * GCC  can  now  use  explicit  relocation operators when generating
       -mabicalls  code. This behavior is controlled by -mexplicit-relocs
       and can have several performance benefits. For example:
          + It  allows  for  more optimization of GOT accesses, including
            better scheduling and redundancy elimination.
          + It allows sibling calls to be implemented as jumps.
          + n32  and  n64  leaf functions can use a call-clobbered global
            pointer instead of $28.
          + The  code  to  set  up $gp can be removed from functions that
            don't need it.
     * A  new  option, -mxgot, allows the GOT to be bigger than 64k. This
       option is equivalent to the assembler's -xgot option and should be
       used instead of -Wa,-xgot.
     * Frame  pointer elimination is now supported when generating 64-bit
       MIPS16 code.
     * Inline  block  moves  have  been optimized to take more account of
       alignment information.
     * Many  internal  changes  have  been  made to the MIPS port, mostly
       aimed at reducing the reliance on assembler macros.

  PowerPC

     * GCC  3.4 releases have a number of fixes for PowerPC and PowerPC64
       [25]ABI  incompatibilities regarding the way parameters are passed
       during    functions   calls.   These   changes   may   result   in
       incompatibility between code compiled with GCC 3.3 and GCC 3.4.

    PowerPC Darwin

     * Support  for  shared/dylib  gcc  libraries  has  been added. It is
       enabled by default on powerpc-apple-darwin7.0.0 and up.
     * Libgcj   is   enabled   by   default.   On   systems   older  than
       powerpc-apple-darwin7.0.0 you need to install [26]dlcompat.
     * 128-bit  IBM  extended  precision  format  support  added for long
       double.

    PowerPC64 GNU/Linux

     * By  default,  PowerPC64  GNU/Linux  now  uses natural alignment of
       structure  elements.  The old four byte alignment for double, with
       special  rules  for a struct starting with a double, can be chosen
       with  -malign-power.  This  change  may  result in incompatibility
       between code compiled with GCC 3.3 and GCC 3.4.
     * -mabi=altivec is now the default rather than -mabi=no-altivec.
     * 128-bit  IBM  extended  precision  format  support  added for long
       double.

  S/390 and zSeries

     * New  command-line  options allow to specify the intended execution
       environment for generated code:
          + -mesa/-mzarch  allows  to  specify  whether  to generate code
            running  in  ESA/390  mode or in z/Architecture mode (this is
            applicable to 31-bit code only).
          + -march  allows  to  specify  a minimum processor architecture
            level (g5, g6, z900, or z990).
          + -mtune allows to specify which processor to tune for.
     * It is possible to customize GCC using the following configure-time
       options:
          + --with-mode,  which  specifies whether to default to assuming
            ESA/390 or z/Architecture mode.
          + --with-arch,  which specifies the default value of the -march
            option.
          + --with-tune,  which specifies the default value of the -mtune
            option.
     * Support for the z990 processor has been added, and can be selected
       using   -march=z990  or  -mtune=z990.  This  includes  instruction
       scheduling  tuned  for the superscalar instruction pipeline of the
       z990  processor  as  well  as  support  for  all  new instructions
       provided by the long-displacement facility.
     * Support  to  generate 31-bit code optimized for zSeries processors
       (running  in  ESA/390  or  in z/Architecture mode) has been added.
       This can be selected using -march=z900 and -mzarch respectively.
     * Instruction  scheduling  for the z900 and z990 processors now uses
       the DFA pipeline hazard recognizer.
     * GCC  no  longer  generates  code  to  maintain  a stack backchain,
       previously   used  to  generate  stack  backtraces  for  debugging
       purposes.  As  replacement  that  does not incur runtime overhead,
       DWARF-2  call  frame  information  is  provided  by  GCC;  this is
       supported  by  GDB 6.1. The old behavior can be restored using the
       -mbackchain option.
     * The  stack  frame  size of functions may now exceed 2 GB in 64-bit
       code.
     * A port for the 64-bit IBM TPF operating system has been added; the
       configuration is s390x-ibm-tpf. This configuration is supported as
       cross-compilation target only.
     * Various   changes   to   improve  the  generated  code  have  been
       implemented, including:
          + GCC  now  uses the MULTIPLY AND ADD and MULTIPLY AND SUBTRACT
            instructions  to  significantly  speed up many floating-point
            applications.
          + GCC  now uses the ADD LOGICAL WITH CARRY and SUBTRACT LOGICAL
            WITH BORROW instructions to speed up long long arithmetic.
          + GCC  now  uses  the  SEARCH  STRING  instruction to implement
            strlen().
          + In  many  cases,  function  call overhead for 31-bit code has
            been  reduced  by placing the literal pool after the function
            code instead of after the function prolog.
          + Register 14 is no longer reserved in 64-bit code.
          + Handling of global register variables has been improved.

  SPARC

     * The option -mflat is deprecated.
     * Support  for  large  (>  2GB)  frames has been added to the 64-bit
       port.
     * Several [27]ABI bugs have been fixed. Unfortunately, these changes
       will break binary compatibility with earlier releases.
     * The  default  debugging  format  has  been  switched from STABS to
       DWARF-2 for 32-bit code on Solaris 7 and later. DWARF-2 is already
       the default debugging format for 64-bit code on Solaris.

  SuperH

     * Support for the SH2E processor has been added. Enabled at run time
       with  the  -m2e  command  line  switch,  or  at  configure time by
       specifying sh2e as the machine part of the target triple.

  V850

     * Support  for  the Mitsubishi V850E1 processor has been added. This
       is a variant of the V850E processor with some additional debugging
       instructions.

  Xtensa

     * Several  ABI  bugs  have  been fixed. Unfortunately, these changes
       break binary compatibility with earlier releases.
          + For  big-endian  processors,  the padding of aggregate return
            values  larger  than  a  word  has changed. If the size of an
            aggregate return value is not a multiple of 32 bits, previous
            versions  of  GCC  inserted  padding  in the most-significant
            bytes  of  the first return value register. Aggregates larger
            than  a word are now padded in the least-significant bytes of
            the  last return value register used. Aggregates smaller than
            a  word  are  still padded in the most-significant bytes. The
            return  value  padding  has  not  changed  for  little-endian
            processors.
          + Function  arguments  with  16-byte alignment are now properly
            aligned.
          + The implementation of the va_list type has changed. A va_list
            value  created  by va_start from a previous release cannot be
            used with va_arg from this release, or vice versa.
     * More  processor  configuration  options  for Xtensa processors are
       supported:
          + the ABS instruction is now optional;
          + the ADDX* and SUBX* instructions are now optional;
          + an experimental CONST16 instruction can be used to synthesize
            constants instead of loading them from constant pools.
       These  and  other  Xtensa  processor  configuration options can no
       longer  be  enabled  or  disabled  by  command-line  options;  the
       processor  configuration  must be specified by the xtensa-config.h
       header    file    when    building    GCC.    Additionally,    the
       -mno-serialize-volatile option is no longer supported.

Obsolete Systems

   Support  for  a  number of older systems has been declared obsolete in
   GCC  3.4. Unless there is activity to revive them, the next release of
   GCC will have their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * Mitsubishi D30V, d30v-*
     * AT&T DSP1600 and DSP1610, dsp16xx-*
     * Intel 80960, i960

   Also, some individual systems have been obsoleted:
     * ARM Family
          + Support  for  generating  code  for operation in APCS/26 mode
            (-mapcs-26).
     * IBM ESA/390
          + "Bigfoot"  port, i370-*. (The other port, s390-*, is actively
            maintained and supported.)
     * Intel 386 family
          + MOSS, i?86-moss-msdos and i?86-*-moss*
          + NCR 3000 running System V r.4, i?86-ncr-sysv4*
          + FreeBSD  with  a.out  object format, i?86-*-freebsd*aout* and
            i?86-*-freebsd2*
          + Linux with a.out object format, i?86-linux*aout*
          + Linux with libc5, a.k.a. glibc1, i?86-linux*libc1*
          + Interix versions before Interix 3, i?86-*-interix
          + Mach microkernel, i?86-mach*
          + SCO UnixWare with UDK, i?86-*-udk*
          + Generic System V releases 1, 2, and 3, i?86-*-sysv[123]*
          + VSTa microkernel, i386-*-vsta
     * Motorola M68000 family
          + HPUX, m68k-hp-hpux* and m68000-hp-hpux*
          + NetBSD   with   a.out  object  format  (before  NetBSD  1.4),
            m68k-*-*-netbsd* except m68k-*-*-netbsdelf*
          + Generic System V r.4, m68k-*-sysv4*
     * VAX
          + Generic  VAX,  vax-*-* (This is generic VAX only; we have not
            obsoleted any VAX triples for specific operating systems.)

Documentation improvements

Other significant improvements

     * The  build  system  has  undergone  several  significant cleanups.
       Subdirectories  will  only  be configured if they are being built,
       and all subdirectory configures are run from the make command. The
       top level has been autoconfiscated.
     * Building GCC no longer writes to its source directory. This should
       help  those wishing to share a read-only source directory over NFS
       or  build  from  a  CD.  The exceptions to this feature are if you
       configure      with     either     --enable-maintainer-mode     or
       --enable-generated-files-in-srcdir.
     * The  -W  warning option has been renamed to -Wextra, which is more
       easily  understood.  The  older  spelling  will  be  retained  for
       backwards compatibility.
     * Substantial   improvements   in   compile  time  have  been  made,
       particularly for non-optimizing compilations.
     _________________________________________________________________

GCC 3.4.0

  Bug Fixes

   A  vast number of bugs have been fixed in 3.4.0, too many to publish a
   complete  list  here.  [28]Follow  this  link  to  query  the Bugzilla
   database  for  the  list  of over 900 bugs fixed in 3.4.0. This is the
   list  of  all  bugs marked as resolved and fixed in 3.4.0 that are not
   flagged as 3.4 regressions.
     _________________________________________________________________

GCC 3.4.1

  Bug Fixes

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.4.1 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

    Bootstrap failures

     * [29]10129  Ada  bootstrap  fails on PPC-Darwin - invalid assembler
       emitted - PIC related
     * [30]14576 [ARM] ICE in libiberty when building gcc-3.4 for arm-elf
     * [31]14760    A   bug   in   configure.in   prevents   using   both
       --program-suffix and --program-prefix
     * [32]14671      [hppa64]      bootstrap      fails:      ICE     in
       save_call_clobbered_regs, in caller_save.c
     * [33]15093  [alpha][Java]  make bootstrap fails to configure libffi
       on Alpha
     * [34]15178 Solaris 9/x86 fails linking after stage 3

    Multi-platform internal compiler errors (ICEs)

     * [35]12753  (preprocessor) Memory corruption in preprocessor on bad
       input
     * [36]13985 ICE in gcc.c-torture/compile/930621-1.c
     * [37]14810  (c++)  tree  check failures with invalid code involving
       templates
     * [38]14883  (c++) ICE on invalid code, in cp_parser_lookup_name, in
       cp/parser.c
     * [39]15044 (c++) ICE on syntax error, template header
     * [40]15057  (c++)  Compiling  of conditional value throw constructs
       cause a segmentation violation
     * [41]15064 (c++) typeid of template parameter gives ICE
     * [42]15142  (c++)  ICE  when  passing  a  string  where  a char* is
       expected in a throw statement
     * [43]15159 ICE in rtl_verify_flow_info_1
     * [44]15165 (c++) ICE in instantiate_template
     * [45]15193   Unary  minus  using  pointer  to  V4SF  vector  causes
       -fforce-mem to exhaust all memory
     * [46]15209 (c++) Runs out of memory with packed structs
     * [47]15227 (c++) Trouble with invalid function definition
     * [48]15285  (c++)  instantiate_type  ICE  when  forming  pointer to
       template function
     * [49]15299 (c++) ICE in resolve_overloaded_unification
     * [50]15329 (c++) ICE on constructor of member template
     * [51]15550 ICE in extract_insn, in recog.c
     * [52]15554 (c++) ICE in tsubst_copy, in cp/pt.c
     * [53]15640   (c++)   ICE   on   invalid   code   in  arg_assoc,  in
       cp/name-lookup.c
     * [54]15666 [unit-at-a-time] Gcc abort on valid code
     * [55]15696 (c++) ICE with bad pointer-to-member code
     * [56]15701 (c++) ICE with friends and template template parameter
     * [57]15761 ICE in do_SUBST, in combine.c
     * [58]15829 (c++) ICE on Botan-1.3.13 due to -funroll-loops

    Ada

     * [59]14538 All RTEMS targets broken for gnat

    C front end

     * [60]12391 missing warning about assigning to an incomplete type
     * [61]14649 atan(1.0) should not be a constant expression
     * [62]15004  [unit-at-a-time]  no  warning  for  unused paramater in
       static function
     * [63]15749  --pedantic-errors  behaves  differently from --pedantic
       with C-compiler on GNU/Linux

    C++ compiler and library

     * [64]10646  non-const  reference is incorrectly matched in a "const
       T" partial specialization
     * [65]12077 wcin.rdbuf()->in_avail() return value too high
     * [66]13598 enc_filebuf doesn't work
     * [67]14211 const_cast returns lvalue but should be rvalue
     * [68]14220 num_put::do_put() undesired float/double behavior
     * [69]14245     problem     with    user-defined    allocators    in
       std::basic_string
     * [70]14340  libstdc++  Debug  mode:  failure to convert iterator to
       const_iterator
     * [71]14600  __gnu_cxx::stdio_sync_filebuf  should  expose  internal
       FILE*
     * [72]14668 no warning anymore for reevaluation of declaration
     * [73]14775 LFS (large file support) tests missing
     * [74]14821   Duplicate   namespace  alias  declaration  should  not
       conflict
     * [75]14930 Friend declaration ignored
     * [76]14932  cannot use offsetof to get offsets of array elements in
       g++ 3.4.0
     * [77]14950  [non  unit-at-a-time]  always_inline  does not mix with
       templates and -O0
     * [78]14962 g++ ignores #pragma redefine_extname
     * [79]14975 Segfault on low-level write error during imbue
     * [80]15002  Linewise  stream  input  is  unusably slow (std::string
       slow)
     * [81]15025   compiler   accepts   redeclaration   of   template  as
       non-template
     * [82]15046 [arm] Math functions misdetected by cross configuration
     * [83]15069 a bit test on a variable of enum type is miscompiled
     * [84]15074 g++ -lsupc++ still links against libstdc++
     * [85]15083 spurious "statement has no effect" warning
     * [86]15096 parse error with templates and pointer to const member
     * [87]15287  combination  of  operator[]  and  operator  .* fails in
       templates
     * [88]15317  __attribute__  unused in first parameter of constructor
       gives error
     * [89]15337 sizeof on incomplete type diagnostic
     * [90]15361 bitset<>::_Find_next fails
     * [91]15412  _GLIBCXX_ symbols symbols defined and used in different
       namespaces
     * [92]15427 valid code results in incomplete type error
     * [93]15471   Incorrect   member   pointer   offsets   in  anonymous
       structs/unions
     * [94]15503 nested template problem
     * [95]15507 compiler hangs while laying out union
     * [96]15542 operator & and template definitions
     * [97]15565 SLES9: leading + sign for unsigned int with showpos
     * [98]15625  friend  defined  inside a template fails to find static
       function
     * [99]15629 Function templates, overloads, and friend name injection
     * [100]15742  'noreturn'  attribute  ignored  in  method of template
       functions.
     * [101]15775 Allocator::pointer consistently ignored
     * [102]15821 Duplicate namespace alias within namespace rejected
     * [103]15862 'enum yn' fails (confict with undeclared builtin)
     * [104]15875 rejects pointer to member in template
     * [105]15877  valid  code  using  templates  and  anonymous enums is
       rejected
     * [106]15947 Puzzling error message for wrong destructor declaration
       in template class
     * [107]16020 cannot copy __gnu_debug::bitset
     * [108]16154 input iterator concept too restrictive
     * [109]16174 deducing top-level consts

    Java

     * [110]14315 Java compiler is not parallel make safe

    Fortran

     * [111]15151 [g77] incorrect logical i/o in 64-bit mode

    Objective-C

     * [112]7993 private variables cannot be shadowed in subclasses

    Optimization bugs

     * [113]15228 useless copies of floating point operands
     * [114]15345   [non-unit-at-a-time]   unreferenced   nested   inline
       functions not optimized away
     * [115]15945 Incorrect floating point optimization
     * [116]15526 ftrapv aborts on 0 * (-1)
     * [117]14690 Miscompiled POOMA tests
     * [118]15112 GCC generates code to write to unchanging memory

    Preprocessor

     * [119]15067 Minor glitch in the source of cpp

    Main driver program bugs

     * [120]1963    collect2   interprets   -oldstyle_liblookup   as   -o
       ldstyle_liblookup

    x86-specific (Intel/AMD)

     * [121]15717 Error: can't resolve `L0' {*ABS* section} - `xx' {*UND*
       section}

    HPPA-specific

     * [122]14782 GCC produces an unaligned data access at -O2
     * [123]14828 FAIL: gcc.c-torture/execute/20030408-1.c execution, -O2
     * [124]15202 ICE in reload_cse_simplify_operands, in postreload.c

    IA64-specific

     * [125]14610 __float80 constants incorrectly emitted
     * [126]14813 init_array sections are initialized in the wrong order
     * [127]14857 GCC segfault on duplicated asm statement
     * [128]15598 Gcc 3.4 ICE on valid code
     * [129]15653 Gcc 3.4 ICE on valid code

    MIPS-specific

     * [130]15189  wrong  filling  of  delay  slot  with -march=mips1 -G0
       -mno-split-addresses -mno-explicit-relocs
     * [131]15331  Assembler  error building gnatlib on IRIX 6.5 with GNU
       as 2.14.91
     * [132]16144 Bogus reference to __divdf3 when -O1
     * [133]16176 Miscompilation of unaligned data in MIPS backend

    PowerPC-specific

     * [134]11591 ICE in gcc.dg/altivec-5.c
     * [135]12028 powerpc-eabispe produces bad sCOND operation
     * [136]14478 rs6000 geu/ltu patterns generate incorrect code
     * [137]14567 long double and va_arg complex args
     * [138]14715  Altivec  stack  layout may overlap gpr save with stack
       temps
     * [139]14902   (libstdc++)   Stream  checking  functions  fail  when
       -pthread option is used.
     * [140]14924 Compiler ICE on valid code
     * [141]14960 -maltivec affects vector return with -mabi=no-altivec
     * [142]15106   vector   varargs  failure  passing  from  altivec  to
       non-altivec code for -m32
     * [143]16026  ICE in function.c:4804, assign_parms, when -mpowerpc64
       & half-word operation
     * [144]15191  -maltivec  -mabi=no-altivec results in mis-aligned lvx
       and stvx
     * [145]15662  Segmentation  fault when an exception is thrown - even
       if try and catch are specified

    s390-specific

     * [146]15054 Bad code due to overlapping stack temporaries

    SPARC-specific

     * [147]15783 ICE with union assignment in 64-bit mode
     * [148]15626   GCC   3.4   emits  "ld:  warning:  relocation  error:
       R_SPARC_UA32"

    x86-64-specific

     * [149]14326 boehm-gc hardcodes to 3DNow! prefetch for x86_64
     * [150]14723 Backported -march=nocona from mainline
     * [151]15290 __float128 failed to pass to function properly

    Cygwin/Mingw32-specific

     * [152]15250  Option  -mms-bitfields  support  on  GCC  3.4  is  not
       conformant to MS layout
     * [153]15551  -mtune=pentium4  -O2  with  sjlj EH breaks stack probe
       worker on windows32 targets

    Bugs specific to embedded processors

     * [154]8309  [m68k]  -m5200  produces  erroneous SImode set of short
       varaible on stack
     * [155]13250  [SH]  Gcc code for rotation clobbers the register, but
       gcc continues to use the register as if it was not clobbered
     * [156]13803 [coldfire] movqi operand constraints too restrictivefor
       TARGET_COLDFIRE
     * [157]14093 [SH] ICE for code when using -mhitachi option in SH
     * [158]14457 [m6811hc] ICE with simple c++ source
     * [159]14542 [m6811hc] ICE on simple source
     * [160]15100 [SH] cc1plus got hang-up on
       libstdc++-v3/testsuite/abi_check.cc
     * [161]15296  [CRIS]  Delayed branch scheduling causing invalid code
       on cris-*
     * [162]15396 [SH] ICE with -O2 -fPIC
     * [163]15782  [coldfire]  m68k_output_mi_thunk  emits wrong code for
       ColdFire

    Testsuite problems (compiler not affected)

     * [164]11610   libstdc++   testcases  27_io/*  don't  work  properly
       remotely
     * [165]15488  (libstdc++) possibly insufficient file permissions for
       executing test suite
     * [166]15489 (libstdc++) testsuite_files determined incorrectly

    Documentation bugs

     * [167]13928  (libstdc++) no whatis info in some man pages generated
       by doxygen
     * [168]14150 Ada documentation out of date
     * [169]14949 (c++) Need to document method visibility changes
     * [170]15123 libstdc++-doc: Allocators.3 manpage is empty
     _________________________________________________________________

GCC 3.4.2

  Bug Fixes

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.4.2 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

    Bootstrap failures and issues

     * [171]16469      [mips-sgi-irix5.3]      bootstrap     fails     in
       libstdc++-v3/testsuite
     * [172]16344    [hppa-linux-gnu]    libstdc++'s    PCH    built   by
       profiledbootstrap does not work with the built compiler
     * [173]16842 [Solaris/x86] mkheaders can not find mkheaders.conf

    Multi-platform internal compiler errors (ICEs)

     * [174]12608 (c++) ICE: expected class 't', have 'x' (error_mark) in
       cp_parser_class_specifier, in cp/parser.c
     * [175]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
     * [176]15461 (c++) ICE due to NRV and inlining
     * [177]15890 (c++) ICE in c_expand_expr, in c-common.c
     * [178]16180 ICE: segmentation fault in RTL optimization
     * [179]16224 (c++) ICE in write_unscoped_name (template/namespace)
     * [180]16408 ICE: in delete_insn, in cfgrtl.c
     * [181]16529 (c++) ICE for: namespace-alias shall not be declared as
       the name of any other entity
     * [182]16698   (c++)   ICE   with   exceptions  and  declaration  of
       __cxa_throw
     * [183]16706    (c++)    ICE    in   finish_member_declaration,   in
       cp/semantics.c
     * [184]16810  (c++)  Legal  C++  program  with  cast  gives  ICE  in
       build_ptrmemfunc
     * [185]16851 (c++) ICE when throwing a comma expression
     * [186]16870 (c++) Boost.Spirit causes ICE in tsubst, in cp/pt.c
     * [187]16904   (c++)   ICE  in  finish_class_member_access_expr,  in
       cp/typeck.c
     * [188]16905 (c++) ICE (segfault) with exceptions
     * [189]16964   (c++)   ICE   in   cp_parser_class_specifier  due  to
       redefinition
     * [190]17068  (c++)  ICE:  tree  check: expected class 'd', have 'x'
       (identifier_node) in dependent_template_p, in cp/pt.c

    Preprocessor bugs

     * [191]16366 Preprocessor option -remap causes memory corruption

    Optimization

     * [192]15345 unreferenced nested inline functions not optimized away
     * [193]16590 Incorrect execution when compiling with -O2
     * [194]16693  Bitwise AND is lost when used within a cast to an enum
       of the same precision
     * [195]17078 Jump into if(0) substatement fails

    Problems in generated debug information

     * [196]13956 incorrect stabs for nested local variables

    C front end bugs

     * [197]16684  GCC  should not warn about redundant redeclarations of
       built-ins

    C++ compiler and library

     * [198]12658   Thread   safety   problems  in  locale::global()  and
       locale::locale()
     * [199]13092 g++ accepts invalid pointer-to-member conversion
     * [200]15320 Excessive memory consumption
     * [201]16246 Incorrect template argument deduction
     * [202]16273  Memory exhausted when using nested classes and virtual
       functions
     * [203]16401 ostringstream in gcc 3.4.x very slow for big data
     * [204]16411 undefined reference to
       __gnu_cxx::stdio_sync_filebuf<char,         std::char_traits<char>
       >::file()
     * [205]16489 G++ incorrectly rejects use of a null constant integral
       expression as a null constant pointer
     * [206]16618 offsetof fails with constant member
     * [207]16637 syntax error reported for valid input code
     * [208]16717 __attribute__((constructor)) broken in C++
     * [209]16813  compiler  error  in  DEBUG  version of range insertion
       std::map::insert
     * [210]16853  pointer-to-member initialization from incompatible one
       accepted
     * [211]16889 ambiguity is not detected
     * [212]16959 Segmentation fault in ios_base::sync_with_stdio

    Java compiler and library

     * [213]7587 direct threaded interpreter not thread-safe
     * [214]16473 ServerSocket accept() leaks file descriptors
     * [215]16478 Hash synchronization deadlock with finalizers

    Alpha-specific

     * [216]10695 ICE in dwarf2out_frame_debug_expr, in dwarf2out.c
     * [217]16974  could  not  split  insn  (ice  in  final_scan_insn, in
       final.c)

    x86-specific

     * [218]16298 ICE in output_operand
     * [219]17113 ICE with SSE2 intrinsics

    x86-64 specific

     * [220]14697 libstdc++ couldn't find 32bit libgcc_s

    MIPS-specific

     * [221]15869 [mips64] No NOP after LW (with -mips1 -O0)
     * [222]16325 [mips64] value profiling clobbers gp on mips
     * [223]16357  [mipsisa64-elf]  ICE  copying  7  bytes between extern
       char[]s
     * [224]16380  [mips64]  Use  of  uninitialised  register  after dbra
       conversion
     * [225]16407 [mips64] Unaligned access to local variables
     * [226]16643    [mips64]    verify_local_live_at_start   ICE   after
       crossjumping & cfgcleanup

    ARM-specific

     * [227]15927  THUMB -O2: strength-reduced iteration variable ends up
       off by 1
     * [228]15948 THUMB: ICE with non-commutative cbranch
     * [229]17019   THUMB:   bad   switch   statement   in  md  code  for
       addsi3_cbranch_scratch

    IA64-specific

     * [230]16130  ICE  on valid code: in bundling, in config/ia64/ia64.c
       (-mtune=merced)
     * [231]16142  ICE  on valid code: in bundling, in config/ia64/ia64.c
       (-mtune=itanium)
     * [232]16278 Gcc failed to build Linux kernel with -mtune=merced
     * [233]16414  ICE on valid code: typo in comparison of asm_noperands
       result
     * [234]16445 ICE on valid code: don't count ignored insns
     * [235]16490 ICE (segfault) while compiling with -fprofile-use
     * [236]16683 ia64 does not honor SUBTARGET_EXTRA_SPECS

    PowerPC-specific

     * [237]16195 (ppc64): Miscompilation of GCC 3.3.x by 3.4.x
     * [238]16239  ICE on ppc64 (mozilla 1.7 compile, -O1 -fno-exceptions
       issue)

    SPARC-specific

     * [239]16199 ICE while compiling apache 2.0.49
     * [240]16416 -m64 doesn't imply -mcpu=v9 anymore
     * [241]16430  ICE  when  returning  non-C  aggregates larger than 16
       bytes

    Bugs specific to embedded processors

     * [242]16379 [m32r] can't output large model function call of memcpy
     * [243]17093 [m32r] ICE with -msdata=use -O0
     * [244]17119 [m32r] ICE at switch case 0x8000

    DJGPP-specific

     * [245]15928 libstdc++ in 3.4.x doesn't cross-compile for djgpp

    Alpha Tru64-specific

     * [246]16210 libstdc++ gratuitously omits "long long" I/O

    Testsuite, documentation issues (compiler is not affected):

     * [247]15488  (libstdc++) possibly insufficient file permissions for
       executing test suite
     * [248]16250 ada/doctools runs makeinfo even in release tarball
     _________________________________________________________________

GCC 3.4.3

   This is the [249]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.4.3 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

    Bootstrap failures

     * [250]17369 [ia64] Bootstrap failure with binutils-2.15.90.0.1.1
     * [251]17850  [arm-elf]  bootstrap  failure - libstdc++ uses strtold
       when undeclared

    Internal compiler errors (ICEs) affecting multiple platforms

     * [252]13948  (java)  GCJ segmentation fault while compiling GL4Java
       .class files
     * [253]14492 ICE in loc_descriptor_from_tree, in dwarf2out.c
     * [254]16301  (c++)  ICE  when  "strong"  attribute is attached to a
       using directive
     * [255]16566 ICE with flexible arrays
     * [256]17023 ICE with nested functions in parameter declaration
     * [257]17027 ICE with noreturn function in loop at -O2
     * [258]17524 ICE in grokdeclarator, in cp/decl.c
     * [259]17826 (c++) ICE in cp_tree_equal

    C and optimization bugs

     * [260]15526 -ftrapv aborts on 0 * (-1)
     * [261]16999 #ident stopped working
     * [262]17503 quadratic behaviour in invalid_mode_change_p
     * [263]17581   Long  long  arithmetic  fails  inside  a  switch/case
       statement when compiled with -O2
     * [264]18129 -fwritable-strings doesn't work

    C++ compiler and library bugs

     * [265]10975 incorrect initial ostringstream::tellp()
     * [266]11722 Unbuffered filebuf::sgetn is slow
     * [267]14534  Unrecognizing  static function as a template parameter
       when its return value is also templated
     * [268]15172    Copy    constructor    optimization   in   aggregate
       initialization
     * [269]15786 Bad error message for frequently occuring error.
     * [270]16162 Rejects valid member-template-definition
     * [271]16612 empty basic_strings can't live in shared memory
     * [272]16715  std::basic_iostream  is  instantiated  when used, even
       though instantiations are already contained in libstdc++
     * [273]16848 code in /ext/demangle.h appears broken
     * [274]17132 GCC fails to eliminate function template specialization
       when argument deduction fails
     * [275]17259  One more _S_leaf incorrectly qualified with _RopeRep::
       in ropeimpl.h
     * [276]17327 use of `enumeral_type' in template type unification
     * [277]17393 "unused variable '._0'" warning with -Wall
     * [278]17501 Confusion with member templates
     * [279]17537  g++  not  passing  -lstdc++ to linker when all command
       line arguments are libraries
     * [280]17585  usage of unqualified name of static member from within
       class not allowed
     * [281]17821 Poor diagnostic for using "." instead of "->"
     * [282]17829 wrong error: call of overloaded function is ambiguous
     * [283]17851 Misleading diagnostic for invalid function declarations
       with undeclared types
     * [284]17976 Destructor is called twice
     * [285]18020 rejects valid definition of enum value in template
     * [286]18093 bogus conflict in namespace aliasing
     * [287]18140 C++ parser bug when using >> in templates

    Fortran

     * [288]17541 data statements with double precision constants fail

    x86-specific

     * [289]17853 -O2 ICE for MMX testcase

    SPARC-specific

     * [290]17245 ICE compiling gsl-1.5 statistics/lag1.c

    Darwin-specific

     * [291]17167 FATAL:Symbol L_foo$stub already defined.

    AIX-specific

     * [292]17277 could not catch an exception when specified -maix64

    Solaris-specific

     * [293]17505  <cmath>  calls  acosf(),  ceilf(), and other functions
       missing from system libraries

    HP/UX specific:

     * [294]17684 /usr/ccs/bin/ld: Can't create libgcc_s.sl

    ARM-specific

     * [295]17384 ICE with mode attribute on structures

    MIPS-specific

     * [296]17770 No NOP after LWL with -mips1

    Other embedded target specific

     * [297]11476 [arc-elf] gcc ICE on newlib's vfprintf.c
     * [298]14064 [avr-elf] -fdata-sections triggers ICE
     * [299]14678 [m68hc11-elf] gcc ICE
     * [300]15583 [powerpc-rtems] powerpc-rtems lacks __USE_INIT_FINI__
     * [301]15790 [i686-coff] Alignment error building gcc with i686-coff
       target
     * [302]15886 [SH] Miscompilation with -O2 -fPIC
     * [303]16884   [avr-elf]   [fweb  related]  bug  while  initializing
       variables

    Bugs relating to debugger support

     * [304]13841 missing debug info for _Complex function arguments
     * [305]15860  [big-endian  targets]  No DW_AT_location debug info is
       emitted  for  formal  arguments to a function that uses "register"
       qualifiers

    Testsuite issues (compiler not affected)

     * [306]17465 Testsuite in libffi overrides LD_LIBRARY_PATH
     * [307]17469 Testsuite in libstdc++ overrides LD_LIBRARY_PATH
     * [308]18138  [mips-sgi-irix6.5]  libgcc_s.so.1  not found by 64-bit
       testsuite

    Documentation

     * [309]15498  typo in gcc manual: non-existing locale example en_UK,
       should be en_GB
     * [310]15747  [mips-sgi-irix5.3]  /bin/sh  hangs  during  bootstrap:
       document broken shell
     * [311]16406 USE_LD_AS_NEEDED undocumented
     _________________________________________________________________

GCC 3.4.4

   This is the [312]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.4.4 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).
     _________________________________________________________________

GCC 3.4.5

   This is the [313]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.4.5 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

    Bootstrap issues

     * [314]24688 sco_math fixincl breaks math.h

    C compiler bugs

     * [315]17188 struct Foo { } redefinition
     * [316]20187   wrong   code   for   ((unsigned  char)(unsigned  long
       long)((a?a:1)&(a*b)))?0:1)
     * [317]21873 infinite warning loop on bad array initializer
     * [318]21899 enum definition accepts values to be overriden
     * [319]22061 ICE in find_function_data, in function.c
     * [320]22308 Failure to diagnose violation of constraint 6.516p2
     * [321]22458 ICE on missing brace
     * [322]22589 ICE casting to long long
     * [323]24101 Segfault with preprocessed source

    C++ compiler and library bugs

     * [324]10611 operations on vector mode not recognized in C++
     * [325]13377 unexpected behavior of namespace usage directive
     * [326]16002 Strange error message with new parser
     * [327]17413 local classes as template argument
     * [328]17609 spurious error message after using keyword
     * [329]17618 ICE in cp_convert_to_pointer, in cp/cvt.c
     * [330]18124 ICE with invalid template template parameter
     * [331]18155 typedef in template declaration not rejected
     * [332]18177 ICE with const_cast for undeclared variable
     * [333]18368 C++ error message regression
     * [334]16378 ICE when returning a copy of a packed member
     * [335]18466 int ::i; accepted
     * [336]18512 ICE on invalid usage of template base class
     * [337]18454 ICE when returning undefined type
     * [338]18738 typename not allowed with non-dependent qualified name
     * [339]18803 rejects access to operator() in template
     * [340]19004 ICE in uses_template_parms, in cp/pt.c
     * [341]19208 Spurious error about variably modified type
     * [342]18253 bad error message / ICE for invalid template parameter
     * [343]19608 ICE after friend function definition in local class
     * [344]19884   ICE  on  explicit  instantiation  of  a  non-template
       constructor
     * [345]20153 ICE when C++ template function contains anonymous union
     * [346]20563  Infinite  loop  in  diagnostic  (and  ice  after error
       message)
     * [347]20789 ICE with incomplete type in template
     * [348]21336 Internal compiler error when using custom new operators
     * [349]21768  ICE  in  error  message  due  to  violation  of coding
       conventions
     * [350]21853 constness of pointer to data member ignored
     * [351]21903   Default   argument  of  template  function  causes  a
       compile-time error
     * [352]21983 multiple diagnostics
     * [353]21987 New testsuite failure
       g++.dg/warn/conversion-function-1.C
     * [354]22153 ICE on invalid template specialization
     * [355]22172 Internal compiler error, seg fault.
     * [356]21286 filebuf::xsgetn vs pipes
     * [357]22233 ICE with wrong number of template parameters
     * [358]22508 ICE after invalid operator new
     * [359]22545  ICE  with  pointer  to  class  member  &  user defined
       conversion operator
     * [360]23528 Wrong default allocator in ext/hash_map
     * [361]23550 char_traits requirements/1.cc test bad math
     * [362]23586 Bad diagnostic for invalid namespace-name
     * [363]23624 ICE in invert_truthvalue, in fold-const.c
     * [364]23639  Bad  error  message:  not  a  member  of '<declaration
       error>'
     * [365]23797 ICE on typename outside template
     * [366]23965  Bogus  error message: no matching function for call to
       'foo(<type error>)'
     * [367]24052  &#`label_decl'  not supported by dump_expr#<expression
       error>
     * [368]24580 virtual base class cause exception not to be caught

    Problems in generated debug information

     * [369]24267 Bad DWARF for altivec vectors

    Optimizations issues

     * [370]17810 ICE in verify_local_live_at_start
     * [371]17860 Wrong generated code for loop with varying bound
     * [372]21709 ICE on compile-time complex NaN
     * [373]21964 broken tail call at -O2 or more
     * [374]22167 Strange optimization bug when using -Os
     * [375]22619    Compilation    failure    for   real_const_1.f   and
       real_const_2.f90
     * [376]23241 Invalid code generated for comparison of uchar to 255
     * [377]23478  Miscompilation  due to reloading of a var that is also
       used in EH pad
     * [378]24470 segmentation fault in cc1plus when compiling with -O
     * [379]24950 ICE in operand_subword_force

    Precompiled headers problems

     * [380]14400 Cannot compile qt-x11-free-3.3.0
     * [381]14940 PCH largefile test fails on various platforms

    Preprocessor bugs

     * [382]20239 ICE on empty preprocessed input
     * [383]15220  "gcc  -E  -MM  -MG"  reports missing system headers in
       source directory

    Testsuite issues

     * [384]19275   gcc.dg/20020919-1.c   fails   with   -fpic/-fPIC   on
       i686-pc-linux-gnu

    Alpha specific

     * [385]21888 bootstrap failure with linker relaxation enabled

    ARM specific

     * [386]15342 [arm-linux]: ICE in verify_local_live_at_start
     * [387]23985 Memory aliasing information incorrect in inlined memcpy

    ColdFile specific

     * [388]16719  Illegal  move  of  byte  into  address register causes
       compiler to ICE

    HPPA specific

     * [389]21723 ICE while building libgfortran
     * [390]21841 -mhp-ld/-mgnu-ld documentation

    IA-64 specific

     * [391]23644   IA-64   hardware  models  and  configuration  options
       documentation error
     * [392]24718 Shared libgcc not used for linking by default

    M68000 specific

     * [393]18421 ICE in reload_cse_simplify_operands, in postreload.c

    MIPS specific

     * [394]20621 ICE in change_address_1, in emit-rtl.c

    PowerPC and PowerPC64 specific

     * [395]18583 error on valid code: const
       __attribute__((altivec(vector__))) doesn't work in arrays
     * [396]20191 ICE in reload_cse_simplify_operands
     * [397]22083 AIX: TARGET_C99_FUNCTIONS is wrongly defined
     * [398]23070 CALL_V4_CLEAR_FP_ARGS flag not properly set
     * [399]23404 gij trashes args of functions with more than 8 fp args
     * [400]23539  C  &  C++  compiler  generating  misaligned references
       regardless of compiler flags
     * [401]24102 floatdisf2_internal2 broken
     * [402]24465 -mminimal-toc miscompilation of __thread vars

    Solaris specific

     * [403]19933 Problem with define of HUGE_VAL in math_c99
     * [404]21889 Native Solaris assembler cannot grok DTP-relative debug
       symbols

    SPARC specific

     * [405]19300 PCH failures on sparc-linux
     * [406]20301 Assembler labels have a leading "-"
     * [407]20673 C PCH testsuite assembly comparison failure

    x86 and x86_64 specific

     * [408]18582 ICE with arrays of type V2DF
     * [409]19340   Compilation   SEGFAULTs  with  -O1  -fschedule-insns2
       -fsched2-use-traces
     * [410]21716 ICE in reg-stack.c's swap_rtx_condition
     * [411]24315 amd64 fails -fpeephole2
     _________________________________________________________________

   Please send FSF & GNU inquiries & questions to [412]gnu@gnu.org. There
   are also [413]other ways to contact the FSF.

   These pages are maintained by [414]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the   [415]GCC   manuals.   If   that   fails,   the
    [416]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer   mailing   list   at   [417]gcc@gnu.org   or
    [418]gcc@gcc.gnu.org. All of our lists have [419]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
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 354. http://gcc.gnu.org/PR22153
 355. http://gcc.gnu.org/PR22172
 356. http://gcc.gnu.org/PR21286
 357. http://gcc.gnu.org/PR22233
 358. http://gcc.gnu.org/PR22508
 359. http://gcc.gnu.org/PR22545
 360. http://gcc.gnu.org/PR23528
 361. http://gcc.gnu.org/PR23550
 362. http://gcc.gnu.org/PR23586
 363. http://gcc.gnu.org/PR23624
 364. http://gcc.gnu.org/PR23639
 365. http://gcc.gnu.org/PR23797
 366. http://gcc.gnu.org/PR23965
 367. http://gcc.gnu.org/PR24052
 368. http://gcc.gnu.org/PR24580
 369. http://gcc.gnu.org/PR24267
 370. http://gcc.gnu.org/PR17810
 371. http://gcc.gnu.org/PR17860
 372. http://gcc/gnu.org/PR21709
 373. http://gcc.gnu.org/PR21964
 374. http://gcc.gnu.org/PR22167
 375. http://gcc.gnu.org/PR22619
 376. http://gcc.gnu.org/PR23241
 377. http://gcc.gnu.org/PR23478
 378. http://gcc.gnu.org/PR24470
 379. http://gcc.gnu.org/PR24950
 380. http://gcc.gnu.org/PR14400
 381. http://gcc.gnu.org/PR14940
 382. http://gcc.gnu.org/PR20239
 383. http://gcc.gnu.org/PR15220
 384. http://gcc.gnu.org/PR19275
 385. http://gcc.gnu.org/PR21888
 386. http://gcc.gnu.org/PR15342
 387. http://gcc.gnu.org/PR23985
 388. http://gcc.gnu.org/PR16719
 389. http://gcc.gnu.org/PR21723
 390. http://gcc.gnu.org/PR21841
 391. http://gcc.gnu.org/PR23644
 392. http://gcc.gnu.org/PR24718
 393. http://gcc.gnu.org/PR18421
 394. http://gcc.gnu.org/PR20621
 395. http://gcc.gnu.org/PR18583
 396. http://gcc.gnu.org/PR20191
 397. http://gcc.gnu.org/PR22083
 398. http://gcc.gnu.org/PR23070
 399. http://gcc.gnu.org/PR23404
 400. http://gcc.gnu.org/PR23539
 401. http://gcc.gnu.org/PR24102
 402. http://gcc.gnu.org/PR24465
 403. http://gcc.gnu.org/PR19933
 404. http://gcc.gnu.org/PR21889
 405. http://gcc.gnu.org/PR19300
 406. http://gcc.gnu.org/PR20301
 407. http://gcc.gnu.org/PR20673
 408. http://gcc.gnu.org/PR18582
 409. http://gcc.gnu.org/PR19340
 410. http://gcc.gnu.org/PR21716
 411. http://gcc.gnu.org/PR24315
 412. mailto:gnu@gnu.org
 413. http://www.gnu.org/home.html#ContactInfo
 414. http://gcc.gnu.org/about.html
 415. http://gcc.gnu.org/onlinedocs/
 416. mailto:gcc-help@gcc.gnu.org
 417. mailto:gcc@gnu.org
 418. mailto:gcc@gcc.gnu.org
 419. http://gcc.gnu.org/lists.html
 420. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/index.html

                           GCC 3.3 Release Series

   May 03, 2005

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.3.6.

   This release is a bug-fix release, containing fixes for regressions in
   GCC 3.3.5 relative to previous releases of GCC.

   This release is the last of the series 3.3.x.

   The   GCC  3.3  release  series  includes  numerous  [2]new  features,
   improvements,  bug  fixes,  and other changes, thanks to an [3]amazing
   group of volunteers.

Release History

   GCC 3.3.6
          May 3, 2005 ([4]changes)

   GCC 3.3.5
          September 30, 2004 ([5]changes)

   GCC 3.3.4
          May 31, 2004 ([6]changes)

   GCC 3.3.3
          February 14, 2004 ([7]changes)

   GCC 3.3.2
          October 16, 2003 ([8]changes)

   GCC 3.3.1
          August 8, 2003 ([9]changes)

   GCC 3.3
          May 14, 2003 ([10]changes)

References and Acknowledgements

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list of [11]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features, improvements, bug fixes, and other changes
   as  well  as test results to GCC. This [12]amazing group of volunteers
   is what makes GCC successful.

   For  additional  information  about  GCC  please  refer to the [13]GCC
   project web site or contact the [14]GCC development mailing list.

   To  obtain  GCC  please  use  [15]our mirror sites, one of the [16]GNU
   mirror sites, or [17]our CVS server.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [18]gnu@gnu.org. There
   are also [19]other ways to contact the FSF.

   These pages are maintained by [20]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [21]GCC   manuals.   If   that   fails,   the
    [22]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [23]gcc@gnu.org   or
    [24]gcc@gcc.gnu.org. All of our lists have [25]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [26]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.3/changes.html
   3. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   4. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.6
   5. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.5
   6. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.4
   7. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.3
   8. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.2
   9. http://gcc.gnu.org/gcc-3.3/changes.html#3.3.1
  10. http://gcc.gnu.org/gcc-3.3/changes.html
  11. http://gcc.gnu.org/gcc-3.3/buildstat.html
  12. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
  13. http://gcc.gnu.org/index.html
  14. mailto:gcc@gcc.gnu.org
  15. http://gcc.gnu.org/mirrors.html
  16. http://www.gnu.org/order/ftp.html
  17. http://gcc.gnu.org/cvs.html
  18. mailto:gnu@gnu.org
  19. http://www.gnu.org/home.html#ContactInfo
  20. http://gcc.gnu.org/about.html
  21. http://gcc.gnu.org/onlinedocs/
  22. mailto:gcc-help@gcc.gnu.org
  23. mailto:gcc@gnu.org
  24. mailto:gcc@gcc.gnu.org
  25. http://gcc.gnu.org/lists.html
  26. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.3/changes.html

                           GCC 3.3 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 3.3 release series is [1]GCC 3.3.6.

Caveats

     * The  preprocessor  no  longer  accepts multi-line string literals.
       They were deprecated in 3.0, 3.1, and 3.2.
     * The  preprocessor no longer supports the -A- switch when appearing
       alone. -A- followed by an assertion is still supported.
     * Support  for  all  the  systems  [2]obsoleted  in GCC 3.1 has been
       removed from GCC 3.3. See below for a [3]list of systems which are
       obsoleted in this release.
     * Checking  for  null  format  arguments has been decoupled from the
       rest  of  the  format  checking  mechanism. Programs which use the
       format  attribute  may  regain this functionality by using the new
       [4]nonnull  function  attribute. Note that all functions for which
       GCC  has  a  built-in  format  attribute,  an appropriate built-in
       nonnull attribute is also applied.
     * The  DWARF  (version  1)  debugging format has been deprecated and
       will be removed in a future version of GCC. Version 2 of the DWARF
       debugging format will continue to be supported for the foreseeable
       future.
     * The  C  and  Objective-C  compilers  no  longer accept the "Naming
       Types"  extension  (typedef foo = bar); it was already unavailable
       in  C++.  Code  which  uses  it will need to be changed to use the
       "typeof"  extension  instead:  typedef  typeof(bar)  foo. (We have
       removed  this extension without a period of deprecation because it
       has  caused  the  compiler  to  crash since version 3.0 and no one
       noticed  until  very  recently.  Thus  we  conclude  it  is not in
       widespread use.)
     * The  -traditional  C  compiler  option  has  been  removed. It was
       deprecated  in  3.1  and  3.2.  (Traditional preprocessing remains
       available.)  The  <varargs.h>  header,  used  for writing variadic
       functions in traditional C, still exists but will produce an error
       message if used.
     * GCC  3.3.1  automatically places zero-initialized variables in the
       .bss  section  on some operating systems. Versions of GNU Emacs up
       to  (and  including)  21.3 will not work correctly when using this
       optimization;  you can use -fno-zero-initialized-in-bss to disable
       it.

General Optimizer Improvements

     * A  new  scheme  for accurately describing processor pipelines, the
       [5]DFA scheduler, has been added.
     * Pavel Nejedly, Charles University Prague, has contributed new file
       format used by the edge coverage profiler (-fprofile-arcs).
       The  new  format  is  robust  and  diagnoses common mistakes where
       profiles  from different versions (or compilations) of the program
       are  combined  resulting  in nonsensical profiles and slow code to
       produced  with  profile  feedback. Additionally this format allows
       extra  data  to  be  gathered.  Currently,  overall statistics are
       produced  helping  optimizers  to  identify hot spots of a program
       globally  replacing  the old intra-procedural scheme and resulting
       in  better  code.  Note that the gcov tool from older GCC versions
       will  not  be  able to parse the profiles generated by GCC 3.3 and
       vice versa.
     * Jan Hubicka, SuSE Labs, has contributed a new superblock formation
       pass enabled using -ftracer. This pass simplifies the control flow
       of functions allowing other optimizations to do better job.
       He    also    contributed    the    function    reordering    pass
       (-freorder-functions) to optimize function placement using profile
       feedback.

New Languages and Language specific improvements

  C/ObjC/C++

     * The preprocessor now accepts directives within macro arguments. It
       processes  them  just  as  if  they  had  not  been  within  macro
       arguments.
     * The   separate   ISO   and  traditional  preprocessors  have  been
       completely   removed.   The  front  end  handles  either  type  of
       preprocessed output if necessary.
     * In  C99  mode  preprocessor arithmetic is done in the precision of
       the target's intmax_t, as required by that standard.
     * The preprocessor can now copy comments inside macros to the output
       file  when  the macro is expanded. This feature, enabled using the
       -CC  option,  is  intended  for  use  by  applications which place
       metadata or directives inside comments, such as lint.
     * The  method of constructing the list of directories to be searched
       for  header  files  has been revised. If a directory named by a -I
       option  is  a  standard  system  include  directory, the option is
       ignored  to  ensure  that  the  default  search  order  for system
       directories  and  the special treatment of system header files are
       not defeated.
     * A few more [6]ISO C99 features now work correctly.
     * A  new  function  attribute,  nonnull, has been added which allows
       pointer  arguments  to  functions  to  be specified as requiring a
       non-null  value.  The  compiler currently uses this information to
       issue  a  warning  when  it detects a null value passed in such an
       argument slot.
     * A  new  type  attribute,  may_alias,  has  been added. Accesses to
       objects  with  types  with  this  attribute  are  not subjected to
       type-based  alias  analysis, but are instead assumed to be able to
       alias any other type of objects, just like the char type.

  C++

     * Type  based  alias analysis has been implemented for C++ aggregate
       types.

  Objective-C

     * Generate  an  error  if Objective-C objects are passed by value in
       function and method calls.
     * When  -Wselector is used, check the whole list of selectors at the
       end  of  compilation,  and  emit a warning if a @selector() is not
       known.
     * Define __NEXT_RUNTIME__ when compiling for the NeXT runtime.
     * No  longer need to include objc/objc-class.h to compile self calls
       in class methods (NeXT runtime only).
     * New -Wundeclared-selector option.
     * Removed selector bloating which was causing object files to be 10%
       bigger on average (GNU runtime only).
     * Using  at  run  time @protocol() objects has been fixed in certain
       situations (GNU runtime only).
     * Type  checking  has  been  fixed  and  improved in many situations
       involving protocols.

  Java

     * The  java.sql  and  javax.sql  packages now implement the JDBC 3.0
       (JDK 1.4) API.
     * The JDK 1.4 assert facility has been implemented.
     * The bytecode interpreter is now direct threaded and thus faster.

  Fortran

     * Fortran improvements are listed in [7]the Fortran documentation.

  Ada

     * Ada tasking now works with glibc 2.3.x threading libraries.

New Targets and Target Specific Improvements

     * The following changes have been made to the HP-PA port:
          + The  port now defaults to scheduling for the PA8000 series of
            processors.
          + Scheduling support for the PA7300 processor has been added.
          + The 32-bit port now supports weak symbols under HP-UX 11.
          + The handling of initializers and finalizers has been improved
            under HP-UX 11. The 64-bit port no longer uses collect2.
          + Dwarf2 EH support has been added to the 32-bit linux port.
          + ABI  fixes  to  correct  the  passing  of small structures by
            value.
     * The  SPARC,  HP-PA, SH4, and x86/pentium ports have been converted
       to use the DFA processor pipeline description.
     * The  following  NetBSD  configurations  for  the  SuperH processor
       family have been added:
          + SH3, big-endian, sh-*-netbsdelf*
          + SH3, little-endian, shle-*-netbsdelf*
          + SH5, SHmedia, big-endian, 32-bit default, sh5-*-netbsd*
          + SH5, SHmedia, little-endian, 32-bit default, sh5le-*-netbsd*
          + SH5, SHmedia, big-endian, 64-bit default, sh64-*-netbsd*
          + SH5, SHmedia, little-endian, 64-bit default, sh64le-*-netbsd*
     * The following changes have been made to the IA-32/x86-64 port:
          + SSE2 and 3dNOW! intrinsics are now supported.
          + Support  for thread local storage has been added to the IA-32
            and x86-64 ports.
          + The x86-64 port has been significantly improved.
     * The following changes have been made to the MIPS port:
          + All configurations now accept the -mabi switch. Note that you
            will  need  appropriate  multilibs  for  this  option to work
            properly.
          + ELF  configurations  will  always  pass  an  ABI  flag to the
            assembler, except when the MIPS EABI is selected.
          + -mabi=64 no longer selects MIPS IV code.
          + The  -mcpu  option,  which was deprecated in 3.1 and 3.2, has
            been removed from this release.
          + -march  now changes the core ISA level. In previous releases,
            it would change the use of processor-specific extensions, but
            would  leave  the core ISA unchanged. For example, mips64-elf
            -march=r8000 will now generate MIPS IV code.
          + Under  most  configurations, -mipsN now acts as a synonym for
            -march.
          + There are some new preprocessor macros to describe the -march
            and  -mtune  settings. See the documentation of those options
            for details.
          + Support for the NEC VR-Series processors has been added. This
            includes the 54xx, 5500, and 41xx series.
          + Support for the Sandcraft sr71k processor has been added.
     * The following changes have been made to the S/390 port:
          + Support  to  build the Java runtime libraries has been added.
            Java   is   now  enabled  by  default  on  s390-*-linux*  and
            s390x-*-linux* targets.
          + Multilib  support  for  the  s390x-*-linux*  target  has been
            added;  this  allows  to build 31-bit binaries using the -m31
            option.
          + Support for thread local storage has been added.
          + Inline  assembler  code  may  now  use  the 'Q' constraint to
            specify memory operands without index register.
          + Various  platform-specific performance improvements have been
            implemented;  in particular, the compiler now uses the BRANCH
            ON  COUNT  family of instructions and makes more frequent use
            of the TEST UNDER MASK family of instructions.
     * The following changes have been made to the PowerPC port:
          + Support for IBM Power4 processor added.
          + Support for Motorola e500 SPE added.
          + Support for AIX 5.2 added.
          + Function and Data sections now supported on AIX.
          + Sibcall optimizations added.
     * The support for H8 Tiny is added to the H8/300 port with -mn.

Obsolete Systems

   Support  for  a  number of older systems has been declared obsolete in
   GCC  3.3. Unless there is activity to revive them, the next release of
   GCC will have their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * Matsushita MN10200, mn10200-*-*
     * Motorola 88000, m88k-*-*
     * IBM ROMP, romp-*-*

   Also, some individual systems have been obsoleted:
     * Alpha
          + Interix, alpha*-*-interix*
          + Linux libc1, alpha*-*-linux*libc1*
          + Linux ECOFF, alpha*-*-linux*ecoff*
     * ARM
          + Generic a.out, arm*-*-aout*
          + Conix, arm*-*-conix*
          + "Old ABI," arm*-*-oabi
          + StrongARM/COFF, strongarm-*-coff*
     * HPPA (PA-RISC)
          + Generic OSF, hppa1.0-*-osf*
          + Generic BSD, hppa1.0-*-bsd*
          + HP/UX versions 7, 8, and 9, hppa1.[01]-*-hpux[789]*
          + HiUX, hppa*-*-hiux*
          + Mach Lites, hppa*-*-lites*
     * Intel 386 family
          + Windows NT 3.x, i?86-*-win32
     * MC68000 family
          + HP systems, m68000-hp-bsd* and m68k-hp-bsd*
          + Sun    systems,   m68000-sun-sunos*,   m68k-sun-sunos*,   and
            m68k-sun-mach*
          + AT&T systems, m68000-att-sysv*
          + Atari systems, m68k-atari-sysv*
          + Motorola systems, m68k-motorola-sysv*
          + NCR systems, m68k-ncr-sysv*
          + Plexus systems, m68k-plexus-sysv*
          + Commodore systems, m68k-cbm-sysv*
          + Citicorp TTI, m68k-tti-*
          + Unos, m68k-crds-unos*
          + Concurrent RTU, m68k-ccur-rtu*
          + Linux a.out, m68k-*-linux*aout*
          + Linux libc1, m68k-*-linux*libc1*
          + pSOS, m68k-*-psos*
     * MIPS
          + Generic ECOFF, mips*-*-ecoff*
          + SINIX, mips-sni-sysv4
          + Orion RTEMS, mips64orion-*-rtems*
     * National Semiconductor 32000
          + OpenBSD, ns32k-*-openbsd*
     * POWER (aka RS/6000) and PowerPC
          + AIX versions 1, 2, and 3, rs6000-ibm-aix[123]*
          + Bull BOSX, rs6000-bull-bosx
          + Generic Mach, rs6000-*-mach*
          + Generic SysV, powerpc*-*-sysv*
          + Linux libc1, powerpc*-*-linux*libc1*
     * Sun SPARC
          + Generic      a.out,      sparc-*-aout*,     sparclet-*-aout*,
            sparclite-*-aout*, and sparc86x-*-aout*
          + NetBSD a.out, sparc-*-netbsd*aout*
          + Generic BSD, sparc-*-bsd*
          + ChorusOS, sparc-*-chorusos*
          + Linux a.out, sparc-*-linux*aout*
          + Linux libc1, sparc-*-linux*libc1*
          + LynxOS, sparc-*-lynxos*
          + Solaris on HAL hardware, sparc-hal-solaris2*
          + SunOS versions 3 and 4, sparc-*-sunos[34]*
     * NEC V850
          + RTEMS, v850-*-rtems*
     * VAX
          + VMS, vax-*-vms*

Documentation improvements

Other significant improvements

     * Almost  all  front-end  dependencies  in  the  compiler  have been
       separated  out  into  a  set  of  language hooks. This should make
       adding a new front end clearer and easier.
     * One  effect  of  removing  the  separate  preprocessor  is a small
       increase  in  the  robustness  of the compiler in general, and the
       maintainability of target descriptions. Previously target-specific
       built-in  macros  and  others,  such  as  __FAST_MATH__, had to be
       handled  with  so-called  specs  that were hard to maintain. Often
       they  would  fail to behave properly when conflicting options were
       supplied  on  the  command  line,  and define macros in the user's
       namespace   even   when   strict  ISO  compliance  was  requested.
       Integrating the preprocessor has cleanly solved these issues.
     * The  Makefile  suite  now  supports redirection of make install by
       means of the variable DESTDIR.
     _________________________________________________________________

GCC 3.3

   Detailed release notes for the GCC 3.3 release follow.

  Bug Fixes

    bootstrap failures

     * [8]10140  cross  compiler  build failures: missing __mempcpy (DUP:
       [9]10198,[10]10338)

    Internal compiler errors (multi-platform)

     * [11]3581 large string causes segmentation fault in cc1
     * [12]4382 __builtin_{set,long}jmp with -O3 can crash the compiler
     * [13]5533  (c++)  ICE  when  processing std::accumulate(begin, end,
       init, invalid_op)
     * [14]6387 -fpic -gdwarf-2 -g1 combination gives ICE in dwarf2out
     * [15]6412 (c++) ICE in retrieve_specialization
     * [16]6620  (c++)  partial  template  specialization  causes  an ICE
       (segmentation fault)
     * [17]6663 (c++) ICE with attribute aligned
     * [18]7068 ICE with incomplete types
     * [19]7083 (c++) ICE using -gstabs with dodgy class derivation
     * [20]7647  (c++) ICE when data member has the name of the enclosing
       class
     * [21]7675 ICE in fixup_var_refs_1
     * [22]7718 'complex' template instantiation causes ICE
     * [23]8116 (c++) ICE in member template function
     * [24]8358 (ada) Ada compiler accesses freed memory, crashes
     * [25]8511  (c++) ICE: (hopefully) reproducible cc1plus segmentation
       fault
     * [26]8564 (c++) ICE in find_function_data, in function.c
     * [27]8660 (c++) template overloading ICE in tsubst_expr, in cp/pt.c
     * [28]8766  (c++) ICE after failed initialization of static template
       variable
     * [29]8803 ICE in instantiate_virtual_regs_1, in function.c
     * [30]8846 (c++) ICE after diagnostic if fr_FR@euro locale is set
     * [31]8906  (c++) ICE (Segmentation fault) when parsing nested-class
       definition
     * [32]9216 (c++) ICE on missing template parameter
     * [33]9261 (c++) ICE in arg_assoc, in cp/decl2.c
     * [34]9263  (fortran)  ICE caused by invalid PARAMETER in implied DO
       loop
     * [35]9429  (c++) ICE in template instantiation with a pointered new
       operator
     * [36]9516 Internal error when using a big array
     * [37]9600 (c++) ICE with typedefs in template class
     * [38]9629 (c++) virtual inheritance segfault
     * [39]9672 (c++) ICE: Error reporting routines re-entered
     * [40]9749   (c++)  ICE  in  write_expression  on  invalid  function
       prototype
     * [41]9794  (fortran)  ICE: floating point exception during constant
       folding
     * [42]9829 (c++) Missing colon in nested namespace usage causes ICE
     * [43]9916 (c++) ICE with noreturn function in ?: statement
     * [44]9936 ICE with local function and variable-length 2d array
     * [45]10262 (c++) cc1plus crashes with large generated code
     * [46]10278 (c++) ICE in parser for invalid code
     * [47]10446  (c++)  ICE on definition of nonexistent member function
       of nested class in a class template
     * [48]10451   (c++)   ICE  in  grokdeclarator  on  spurious  mutable
       declaration
     * [49]10506    (c++)    ICE   in   build_new   at   cp/init.c   with
       -fkeep-inline-functions and multiple inheritance
     * [50]10549  (c++)  ICE  in store_bit_field on bitfields that exceed
       the precision of the declared type

    Optimization bugs

     * [51]2001 Inordinately long compile times in reload CSE regs
     * [52]2391 Exponential compilation time explosion in combine
     * [53]2960 Duplicate loop conditions even with -Os
     * [54]4046 redundant conditional branch
     * [55]6405 Loop-unrolling related performance regressions
     * [56]6798 very long compile time with large case-statement
     * [57]6871 const objects shouldn't be moved to .bss
     * [58]6909 problem w/ -Os on modified loop-2c.c test case
     * [59]7189  gcc  -O2  -Wall  does not print ``control reaches end of
       non-void function'' warning
     * [60]7642 optimization problem with signbit()
     * [61]8634 incorrect code for inlining of memcpy under -O2
     * [62]8750 Cygwin prolog generation erroneously emitting __alloca as
       regular function call

    C front end

     * [63]2161 long if-else cascade overflows parser stack
     * [64]4319 short accepted on typedef'd char
     * [65]8602  incorrect  line  numbers  in warning messages when using
       inline functions
     * [66]9177    -fdump-translation-unit:    C    front   end   deletes
       function_decl AST nodes and breaks debugging dumps
     * [67]9853 miscompilation of non-constant structure initializer

    c++ compiler and library

     * [68]45  legal  template  specialization  code  is  rejected  (DUP:
       [69]3784)
     * [70]764  lookup  failure:  friend  operator  and  dereferencing  a
       pointer and templates (DUP: [71]5116)
     * [72]2862  gcc  accepts invalid explicit instantiation syntax (DUP:
       2863)
     * [73]3663   G++   doesn't  check  access  control  during  template
       instantiation
     * [74]3797  gcc  fails to emit explicit specialization of a template
       member
     * [75]3948  Two  destructors  are  called when no copy destructor is
       defined (ABI change)
     * [76]4137 Conversion operator within template is not accepted
     * [77]4361 bogus ambiguity taking the address of a member template
     * [78]4802  g++  accepts  illegal  template  code (access to private
       member; DUP: [79]5837)
     * [80]4803  inline  function is used but never defined, and g++ does
       not object
     * [81]5094 Partial specialization cannot be friend?
     * [82]5730    complex<double>::norm()    --   huge   slowdown   from
       egcs-2.91.66
     * [83]6713  Regression  wrt 3.0.4: g++ -O2 leads to seg fault at run
       time
     * [84]7015 certain __asm__ constructs rejected
     * [85]7086   compile   time   regression   (quadratic   behavior  in
       fixup_var_refs)
     * [86]7099  G++  doesn't set the noreturn attribute on std::exit and
       std::abort
     * [87]7247  copy  constructor missing when inlining enabled (invalid
       optimization?)
     * [88]7441  string  array initialization compilation time regression
       from seconds to minutes
     * [89]7768 __PRETTY_FUNCTION__ for template destructor is wrong
     * [90]7804  bad  printing  of  floating  point  constant  in warning
       message
     * [91]8099 Friend classes and template specializations
     * [92]8117 member function pointers and multiple inheritance
     * [93]8205 using declaration and multiple inheritance
     * [94]8645 unnecessary non-zero checks in stl_tree.h
     * [95]8724 explicit destructor call for incomplete class allowed
     * [96]8805 compile time regression with many member variables
     * [97]8691 -O3 and -fno-implicit-templates are incompatible
     * [98]8700 unhelpful error message for binding temp to reference
     * [99]8724 explicit destructor call for incomplete class allowed
     * [100]8949 numeric_limits<>::denorm_min() and is_iec559 problems
     * [101]9016  Failure  to  consistently  constant fold "constant" C++
       objects
     * [102]9053  g++  confused  about  ambiguity  of overloaded function
       templates
     * [103]9152 undefined virtual thunks
     * [104]9182 basic_filebuf<> does not report errors in codecvt<>::out
     * [105]9297 data corruption due to codegen bug (when copying.)
     * [106]9318 i/ostream::operator>>/<<(streambuf*) broken
     * [107]9320    Incorrect    usage    of   traits_type::int_type   in
       stdio_filebuf
     * [108]9400  bogus -Wshadow warning: shadowed declaration of this in
       local classes
     * [109]9424 i/ostream::operator>>/<<(streambuf*) drops characters
     * [110]9425 filebuf::pbackfail broken (DUP: [111]9439)
     * [112]9474  GCC freezes in compiling a weird code mixing <iostream>
       and <iostream.h>
     * [113]9548    Incorrect    results    from   setf(ios::fixed)   and
       precision(-1) [114][DR 231]
     * [115]9555 ostream inserters fail to set badbit on exception
     * [116]9561 ostream inserters rethrow exception of wrong type
     * [117]9563 ostream::sentry returns true after a failed preparation
     * [118]9582 one-definition rule violation in std::allocator
     * [119]9622 __PRETTY_FUNCTION__ incorrect in template destructors
     * [120]9683  bug in initialization chains for static const variables
       from template classes
     * [121]9791 -Woverloaded-virtual reports hiding of destructor
     * [122]9817 collate::compare doesn't handle nul characters
     * [123]9825 filebuf::sputbackc breaks sbumpc
     * [124]9826 operator>>(basic_istream, basic_string) fails to compile
       with custom traits
     * [125]9924  Multiple  using  statements  for  builtin functions not
       allowed
     * [126]9946 destructor is not called for temporary object
     * [127]9964 filebuf::close() sometimes fails to close file
     * [128]9988 filebuf::overflow writes EOF to file
     * [129]10033  optimization  breaks  polymorphic references w/ typeid
       operator
     * [130]10097 filebuf::underflow drops characters
     * [131]10132 filebuf destructor can throw exceptions
     * [132]10180 gcc fails to warn about non-inlined function
     * [133]10199   method   parametrized   by  template  does  not  work
       everywhere
     * [134]10300 use of array-new (nothrow) in segfaults on NULL return
     * [135]10427  Stack corruption with variable-length automatic arrays
       and virtual destructors
     * [136]10503 Compilation never stops in fixed_type_or_null

    Objective-C

     * [137]5956  selectors  aren't  matched  properly  when added to the
       selector table

    Fortran compiler and library

     * [138]1832 list directed i/o overflow hangs, -fbounds-check doesn't
       detect
     * [139]3924 g77 generates code that is rejected by GAS if COFF debug
       info requested
     * [140]5634 doc: explain that configure --prefix=~/... does not work
     * [141]6367 multiple repeat counts confuse namelist read into array
     * [142]6491   Logical   operations  error  on  logicals  when  using
       -fugly-logint
     * [143]6742 Generation of C++ Prototype for FORTRAN and extern "C"
     * [144]7113 Failure of g77.f-torture/execute/f90-intrinsic-bit.f -Os
       on irix6.5
     * [145]7236  OPEN(...,RECL=nnn,...)  without  ACCESS='DIRECT' should
       assume a direct access file
     * [146]7278   g77   "bug";   the  executable  misbehaves  (with  -O2
       -fno-automatic)
     * [147]7384 DATE_AND_TIME milliseconds field inactive on Windows
     * [148]7388 Incorrect output with 0-based array of characters
     * [149]8587  Double  complex  zero ** double precision number -> NaN
       instead of zero
     * [150]9038   -ffixed-line-length-none   -x   f77-cpp-input   gives:
       Warning: unknown register name line-length-none
     * [151]10197 Direct access files not unformatted by default

    Java compiler and library

     * [152]6005 gcj fails to build rhug on alpha
     * [153]6389    System.getProperty("")   should   always   throw   an
       IllegalArgumentException
     * [154]6576 java.util.ResourceBundle.getResource ignores locale
     * [155]6652 new java.io.File("").getCanonicalFile() throws exception
     * [156]7060 getMethod() doesn't search super interface
     * [157]7073  bytecode  interpreter  gives wrong answer for interface
       getSuperclass()
     * [158]7180 possible bug in
       javax.naming.spi.NamingManager.getPlusPath()
     * [159]7416 java.security startup refs "GNU libgcj.security"
     * [160]7570  Runtime.exec  with  null  envp:  child  doesn't inherit
       parent env (DUP: [161]7578)
     * [162]7611 Internal error while compiling libjava with -O
     * [163]7709 NullPointerException in _Jv_ResolvePoolEntry
     * [164]7766  ZipInputStream.available  returns  0  immediately after
       construction
     * [165]7785   Calendar.getTimeInMillis/setTimeInMillis   should   be
       public
     * [166]7786 TimeZone.getDSTSavings() from JDK1.4 not implemented
     * [167]8142 '$' in class names vs. dlopen 'dynamic string tokens'
     * [168]8234  ZipInputStream  chokes  when InputStream.read() returns
       small chunks
     * [169]8415 reflection bug: exception info for Method
     * [170]8481 java.Random.nextInt(int) may return negative
     * [171]8593 Error reading GZIPped files with BufferedReader
     * [172]8759   java.beans.Introspector   has   no   flushCaches()  or
       flushFromCaches() methods
     * [173]8997 spin() calls Thread.sleep
     * [174]9253  on  win32,  java.io.File.listFiles("C:\\")  returns pwd
       instead of the root content of C:
     * [175]9254   java::lang::Object::wait(),  threads-win32.cc  returns
       wrong return codes
     * [176]9271 Severe bias in java.security.SecureRandom

    Ada compiler and library

     * [177]6767 make gnatlib-shared fails on -laddr2line
     * [178]9911   gnatmake  fails  to  link  when  GCC  configured  with
       --with-sjlj-exceptions=yes
     * [179]10020 Can't bootstrap gcc on AIX with Ada enabled
     * [180]10546 Ada tasking not working on Red Hat 9

    preprocessor

     * [181]7029 preprocessor should ignore #warning with -M

    ARM-specific

     * [182]2903 [arm] Optimization bug with long long arithmetic
     * [183]7873  arm-linux-gcc  fails  when  assigning  address to a bit
       field

    FreeBSD-specific

     * [184]7680  float  functions undefined in math.h/cmath with #define
       _XOPEN_SOURCE

    HP-UX or HP-PA-specific

     * [185]8705 [HP-PA] ICE in emit_move_insn_1, in expr.c
     * [186]9986  [HP-UX]  Incorrect  transformation of fputs_unlocked to
       fputc_unlocked
     * [187]10056 [HP-PA] ICE at -O2 when building c++ code from doxygen

    m68hc11-specific

     * [188]6744  Bad  assembler  code  generated:  reference  to  pseudo
       register z
     * [189]7361 Internal compiler error in reload_cse_simplify_operands,
       in reload1.c

    MIPS-specific

     * [190]9496 [mips-linux] bug in optimizer?

    PowerPC-specific

     * [191]7067  -Os  with -mcpu=powerpc optimizes for speed (?) instead
       of space
     * [192]8480 reload ICEs for LAPACK code on powerpc64-linux
     * [193]8784 [AIX] Internal compiler error in simplify_gen_subreg
     * [194]10315 [powerpc] ICE: in extract_insn, in recog.c

    SPARC-specific

     * [195]10267    (documentation)   Wrong   build   instructions   for
       *-*-solaris2*

    x86-specific (Intel/AMD)

     * [196]7916 ICE in instantiate_virtual_register_1
     * [197]7926  (c++)  i486  instructions  in  header  files  make  c++
       programs crash on i386
     * [198]8555 ICE in gen_split_1231
     * [199]8994 ICE with -O -march=pentium4
     * [200]9426 ICE with -fssa -funroll-loops -fprofile-arcs
     * [201]9806 ICE in inline assembly with -fPIC flag
     * [202]10077  gcc  -msse2  generates movd to move dwords between xmm
       regs
     * [203]10233 64-bit comparison only comparing bottom 32-bits
     * [204]10286 type-punning doesn't work with __m64 and -O
     * [205]10308 [x86] ICE with -O -fgcse or -O2
     _________________________________________________________________

GCC 3.3.1

  Bug Fixes

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.3.1 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).

    Bootstrap failures

     * [206]11272 [Solaris] make bootstrap fails while building libstdc++

    Internal compiler errors (multi-platform)

     * [207]5754 ICE on invalid nested template class
     * [208]6597  ICE  in set_mem_alias_set compiling Qt with -O2 on ia64
       and --enable-checking
     * [209]6949 (c++) ICE in tsubst_decl, in cp/pt.c
     * [210]7053 (c++) ICE when declaring a function already defined as a
       friend method of a template class
     * [211]8164  (c++)  ICE  when  using  different const expressions as
       template parameter
     * [212]8384 (c++) ICE in is_base_type, in dwarf2out.c
     * [213]9559 (c++) ICE with invalid initialization of a static const
     * [214]9649    (c++)    ICE    in    finish_member_declaration,   in
       cp/semantics.c when redeclaring a static member variable
     * [215]9864   (fortran)  ICE  in  add_abstract_origin_attribute,  in
       dwarfout.c with -g -O -finline-functions
     * [216]10432 (c++) ICE in poplevel, in cp/decl.c
     * [217]10475 ICE in subreg_highpart_offset for code with long long
     * [218]10635  (c++) ICE when dereferencing an incomplete type casted
       from a void pointer
     * [219]10661   (c++)  ICE  in  instantiate_decl,  in  cp/pt.c  while
       instantiating static member variables
     * [220]10700 ICE in copy_to_mode_reg on 64-bit targets
     * [221]10712 (c++) ICE in constructor_name_full, in cp/decl2.c
     * [222]10796 (c++) ICE when defining an enum with two values: -1 and
       MAX_INT_64BIT
     * [223]10890  ICE  in  merge_assigned_reloads  building Linux 2.4.2x
       sched.c
     * [224]10939 (c++) ICE with template code
     * [225]10956  (c++) ICE when specializing a template member function
       of a template class, in tsubst, in cp/pt.c
     * [226]11041  (c++)  ICE:  const  myclass &x = *x; (when operator*()
       defined)
     * [227]11059 (c++) ICE with empty union
     * [228]11083  (c++)  ICE  in  commit_one_edge_insertion, in cfgrtl.c
       with -O2 -fnon-call-exceptions
     * [229]11105 (c++) ICE in mangle_conv_op_name_for_type
     * [230]11149  (c++)  ICE  on  error  when  instantiation  with  call
       function of a base type
     * [231]11228  (c++)  ICE  on new-expression using array operator new
       and default-initialization
     * [232]11282 (c++) Infinite memory usage after syntax error
     * [233]11301 (fortran) ICE with -fno-globals
     * [234]11308  (c++) ICE when using an enum type name as if it were a
       class or namespace
     * [235]11473  (c++) ICE with -gstabs when empty struct inherits from
       an empty struct
     * [236]11503 (c++) ICE when instantiating template with ADDR_EXPR
     * [237]11513  (c++)  ICE  in  push_template_decl_real,  in  cp/pt.c:
       template member functions

    Optimization bugs

     * [238]11198  -O2  -frename-registers generates wrong code (aliasing
       problem)
     * [239]11304 Wrong code production with -fomit-frame-pointer
     * [240]11381 volatile memory access optimized away
     * [241]11536 [strength-reduce] -O2 optimization produces wrong code
     * [242]11557 constant folding bug generates wrong code

    C front end

     * [243]5897 No warning for statement after return
     * [244]11279 DWARF-2 output mishandles large enums

    Preprocessor bugs

     * [245]11022 no warning for non-compatible macro redefinition

    C++ compiler and library

     * [246]2330 static_cast<>() to a private base is allowed
     * [247]5388 Incorrect message "operands to ?: have different types"
     * [248]5390   Libiberty   fails  to  demangle  multi-digit  template
       parameters
     * [249]7877 Incorrect parameter passing to specializations of member
       function templates
     * [250]9393 Anonymous namespaces and compiling the same file twice
     * [251]10032 -pedantic converts some errors to warnings
     * [252]10468 const typeof(x) is non-const, but only in templates
     * [253]10527  confused  error  message  with  "new  int()" parameter
       initializer
     * [254]10679 parameter MIN_INLINE_INSNS is not honored
     * [255]10682  gcc  chokes  on  a  typedef for an enum inside a class
       template
     * [256]10689  pow(std::complex(0),1/3) returns (nan, nan) instead of
       0.
     * [257]10845  template  member  function  (with  nested  template as
       parameter)  cannot be called anymore if another unrelated template
       member function is defined
     * [258]10849  Cannot  define  an  out-of-class  specialization  of a
       private nested template class
     * [259]10888 Suppress -Winline warnings for system headers
     * [260]10929  -Winline warns about functions for which no definition
       is visible
     * [261]10931    valid    conversion    static_cast<const    unsigned
       int&>(lvalue-of-type-int) is rejected
     * [262]10940 Bad code with explicit specialization
     * [263]10968  If  member  function implicitly instantiated, explicit
       instantiation of class fails to instantiate it
     * [264]10990  Cannot  convert  with dynamic_cast<> to a private base
       class from within a member function
     * [265]11039  Bad  interaction between implicit typename deprecation
       and friendship
     * [266]11062   (libstdc++)   avoid   __attribute__  ((unused));  say
       "__unused__" instead
     * [267]11095  C++  iostream  manipulator causes segfault when called
       with negative argument
     * [268]11098  g++  doesn't  emit  complete debugging information for
       local variables in destructors
     * [269]11137  Linux  shared  library  constructors not called unless
       there's one global object
     * [270]11154   spurious   ambiguity   report   for   template  class
       specialization
     * [271]11329 Compiler cannot find user defined implicit typecast
     * [272]11332 Spurious error with casts in ?: expression
     * [273]11431  static_cast  behavior  with  subclasses  when  default
       constructor available
     * [274]11528 money_get facet does not accept "$.00" as valid
     * [275]11546  Type  lookup  problems  in out-of-line definition of a
       class doubly nested from a template class
     * [276]11567 C++ code containing templated member function with same
       name as pure virtual member function results in linking failure
     * [277]11645 Failure to deal with using and private inheritance

    Java compiler and library

     * [278]5179  Qualified  static  field  access doesn't initialize its
       class
     * [279]8204   gcj   -O2  to  native  reorders  certain  instructions
       improperly
     * [280]10838 java.io.ObjectInputStream syntax error
     * [281]10886  The  RMI  registry  that  comes with GCJ does not work
       correctly
     * [282]11349 JNDI URL context factories not located correctly

    x86-specific (Intel/AMD)

     * [283]4823 ICE on inline assembly code
     * [284]8878 miscompilation with -O and SSE
     * [285]9815  (c++  library)  atomicity.h - fails to compile with -O3
       -masm=intel
     * [286]10402  (inline assembly) [x86] ICE in merge_assigned_reloads,
       in reload1.c
     * [287]10504 ICE with SSE2 code and -O3 -mcpu=pentium4 -msse2
     * [288]10673 ICE for x86-64 on freebsd libc vfprintf.c source
     * [289]11044 [x86] out of range loop instructions for FP code on K6
     * [290]11089  ICE:  instantiate_virtual_regs_lossage while using SSE
       built-ins
     * [291]11420 [x86_64] gcc generates invalid asm code when "-O -fPIC"
       is used

    SPARC- or Solaris- specific

     * [292]9362 solaris 'as' dies when fed .s and "-gstabs"
     * [293]10142   [SPARC64]   gcc  produces  wrong  code  when  passing
       structures by value
     * [294]10663 New configure check aborts with Sun tools.
     * [295]10835 combinatorial explosion in scheduler on HyperSPARC
     * [296]10876 ICE in calculate_giv_inc when building KDE
     * [297]10955  wrong code at -O3 for structure argument in context of
       structure return
     * [298]11018 -mcpu=ultrasparc busts tar-1.13.25
     * [299]11556  [sparc64]  ICE  in gen_reg_rtx() while compiling 2.6.x
       Linux kernel

    ia64 specific

     * [300]10907 gcc violates the ia64 ABI (GP must be preserved)
     * [301]11320 scheduler bug (in machine depended reorganization pass)
     * [302]11599 bug with conditional and __builtin_prefetch

    PowerPC specific

     * [303]9745  [powerpc]  gcc  mis-compiles  libmcrypt  (alias problem
       during loop)
     * [304]10871 error in rs6000_stack_info save_size computation
     * [305]11440   gcc   mis-compiles  c++  code  (libkhtml)  with  -O2,
       -fno-gcse cures it

    m68k-specific

     * [306]7594 [m68k] ICE on legal code associated with simplify-rtx
     * [307]10557 [m68k] ICE in subreg_offset_representable_p
     * [308]11054 [m68k] ICE in reg_overlap_mentioned_p

    ARM-specific

     * [309]10834  [arm]  GCC  3.3 still generates incorrect instructions
       for functions with __attribute__ ((interrupt ("IRQ")))
     * [310]10842  [arm]  Clobbered  link  register is copied to pc under
       certain circumstances
     * [311]11052 [arm] noce_process_if_block() can lose REG_INC notes
     * [312]11183 [arm] ICE in change_address_1 (3.3) / subreg_hard_regno
       (3.4)

    MIPS-specific

     * [313]11084 ICE in propagate_one_insn, in flow.c

    SH-specific

     * [314]10331 can't compile c++ part of gcc cross compiler for sh-elf
     * [315]10413 [SH] ICE in reload_cse_simplify_operands, in reload1.c
     * [316]11096  i686-linux to sh-linux cross compiler fails to compile
       C++ files

    GNU/Linux (or Hurd?) specific

     * [317]2873 Bogus fixinclude of stdio.h from glibc 2.2.3

    UnixWare specific

     * [318]3163   configure  bug:  gcc/aclocal.m4  mmap  test  fails  on
       UnixWare 7.1.1

    Cygwin (or mingw) specific

     * [319]5287 ICE with dllimport attribute
     * [320]10148 [MingW/CygWin] Compiler dumps core

    DJGPP specific

     * [321]8787  GCC  fails  to  emit  .intel_syntax  when  invoked with
       -masm=intel on DJGPP

    Darwin (and MacOS X) specific

     * [322]10900 trampolines crash

    Documentation

     * [323]1607 (c++) Format attributes on methods undocumented
     * [324]4252 Invalid option `-fdump-translation-unit'
     * [325]4490    Clarify    restrictions    on    -m96bit-long-double,
       -m128bit-long-double
     * [326]10355  document  an  issue  with  regparm  attribute  on some
       systems (e.g. Solaris)
     * [327]10726  (fortran)  Documentation for function "IDate Intrinsic
       (Unix)" is wrong
     * [328]10805 document bug in old version of Sun assembler
     * [329]10815 warn against GNU binutils on AIX
     * [330]10877 document need for newer binutils on i?86-*-linux-gnu
     * [331]11280 Manual incorrect with respect to -freorder-blocks
     * [332]11466  Document  -mlittle-endian and its restrictions for the
       sparc64 port

    Testsuite bugs (compiler itself is not affected)

     * [333]10737 newer bison causes g++.dg/parse/crash2.C to incorrectly
       report failure
     * [334]10810   gcc-3.3   fails   make   check:   buffer  overrun  in
       test_demangle.c
     _________________________________________________________________

GCC 3.3.2

  Bug Fixes

   This  section  lists  the  problem  reports  (PRs) from [335]GCC's bug
   tracking  system that are known to be fixed in the 3.3.2 release. This
   list might not be complete (that is, it is possible that some PRs that
   have been fixed are not listed here).

    Bootstrap failures and problems

     * [336]8336 [SCO5] bootstrap config still tries to use COFF options
     * [337]9330  [alpha-osf]  Bootstrap  failure  on  Compaq  Tru64 with
       --enable-threads=posix
     * [338]9631 [hppa64-linux] gcc-3.3 fails to bootstrap
     * [339]9877   fixincludes   makes  a  bad  sys/byteorder.h  on  svr5
       (UnixWare 7.1.1)
     * [340]11687 xstormy16-elf build fails in libf2c
     * [341]12263   [SGI   IRIX]   bootstrap   fails  during  compile  of
       libf2c/libI77/backspace.c
     * [342]12490  buffer  overflow  in  scan-decls.c  (during  Solaris 9
       fix-header processing)

    Internal compiler errors (multi-platform)

     * [343]7277 Casting integers to vector types causes ICE
     * [344]7939 (c++) ICE on invalid function template specialization
     * [345]11063 (c++) ICE on parsing initialization list of const array
       member
     * [346]11207 ICE with negative index in array element designator
     * [347]11522 (fortran) g77 dwarf-2 ICE in
       add_abstract_origin_attribute
     * [348]11595 (c++) ICE on duplicate label definition
     * [349]11646    (c++)    ICE   in   commit_one_edge_insertion   with
       -fnon-call-exceptions -fgcse -O
     * [350]11665 ICE in struct initializer when taking address
     * [351]11852 (c++) ICE with bad struct initializer.
     * [352]11878 (c++) ICE in cp_expr_size
     * [353]11883 ICE with any -O on mercury-generated C code
     * [354]11991   (c++)   ICE   in  cxx_incomplete_type_diagnostic,  in
       cp/typeck2.c  when  applying  typeid operator to template template
       parameter
     * [355]12146 ICE in lookup_template_function, in cp/pt.c
     * [356]12215   ICE  in  make_label_edge  with  -fnon-call-exceptions
       -fno-gcse -O2
     * [357]12369 (c++) ICE with templates and friends
     * [358]12446 ICE in emit_move_insn on complicated array reference
     * [359]12510 ICE in final_scan_insn
     * [360]12544 ICE with large parameters used in nested functions

    C and optimization bugs

     * [361]9862 spurious warnings with -W -finline-functions
     * [362]10962  lookup_field  is a linear search on a linked list (can
       be slow if large struct)
     * [363]11370 -Wunreachable-code gives false complaints
     * [364]11637 invalid assembly with -fnon-call-exceptions
     * [365]11885 Problem with bitfields in packed structs
     * [366]12082 Inappropriate unreachable code warnings
     * [367]12180 Inline optimization fails for variadic function
     * [368]12340 loop unroller + gcse produces wrong code

    C++ compiler and library

     * [369]3907 nested template parameter collides with member name
     * [370]5293   confusing  message  when  binding  a  temporary  to  a
       reference
     * [371]5296  [DR115] Pointers to functions and to template functions
       behave differently in deduction
     * [372]7939 ICE on function template specialization
     * [373]8656 Unable to assign function with __attribute__ and pointer
       return type to an appropriate variable
     * [374]10147  Confusing  error message for invalid template function
       argument
     * [375]11400 std::search_n() makes assumptions about Size parameter
     * [376]11409   issues  with  using  declarations,  overloading,  and
       built-in functions
     * [377]11740  ctype<wchar_t>::do_is(mask,  wchar_t)  doesn't  handle
       multiple bits in mask
     * [378]11786  operator()  call  on  variable  in other namespace not
       recognized
     * [379]11867 static_cast ignores ambiguity
     * [380]11928 bug with conversion operators that are typedefs
     * [381]12114 Uninitialized memory accessed in dtor
     * [382]12163 static_cast + explicit constructor regression
     * [383]12181 Wrong code with comma operator and c++
     * [384]12236 regparm and fastcall messes up parameters
     * [385]12266  incorrect  instantiation  of  unneeded template during
       overload resolution
     * [386]12296 istream::peek() doesn't set eofbit
     * [387]12298     [sjlj    exceptions]    Stack    unwind    destroys
       not-yet-constructed object
     * [388]12369 ICE with templates and friends
     * [389]12337 apparently infinite loop in g++
     * [390]12344 stdcall attribute ignored if function returns a pointer
     * [391]12451 missing(late) class forward declaration in cxxabi.h
     * [392]12486 g++ accepts invalid use of a qualified name

    x86 specific (Intel/AMD)

     * [393]8869  [x86  MMX] ICE with const variable optimization and MMX
       builtins
     * [394]9786  ICE  in fixup_abnormal_edges with -fnon-call-exceptions
       -O2
     * [395]11689 g++3.3 emits un-assembleable code for k6 architecture
     * [396]12116 [k6] Invalid assembly output values with X-MAME code
     * [397]12070  ICE  converting  between  double  and long double with
       -msoft-float

    ia64-specific

     * [398]11184 [ia64 hpux] ICE on __builtin_apply building libobjc
     * [399]11535 __builtin_return_address may not work on ia64
     * [400]11693 [ia64] ICE in gen_nop_type
     * [401]12224 [ia64] Thread-local storage doesn't work

    PowerPC-specific

     * [402]11087  [powerpc64-linux]  GCC  miscompiles raid1.c from linux
       kernel
     * [403]11319 loop miscompiled on ppc32
     * [404]11949 ICE Compiler segfault with ffmpeg -maltivec code

    SPARC-specific

     * [405]11662  wrong  code  for  expr.  with  cast  to  long long and
       exclusive or
     * [406]11965 invalid assembler code for a shift < 32 operation
     * [407]12301  (c++)  stack  corruption  when  a  returned expression
       throws an exception

    Alpha-specific

     * [408]11717  [alpha-linux]  unrecognizable  insn compiling for.c of
       kernel 2.4.22-pre8

    HPUX-specific

     * [409]11313 problem with #pragma weak and static inline functions
     * [410]11712 __STDC_EXT__ not defined for C++ by default anymore?

    Solaris specific

     * [411]12166 Profiled programs crash if PROFDIR is set

    Solaris-x86 specific

     * [412]12101 i386 Solaris no longer works with GNU as?

    Miscellaneous embedded target-specific bugs

     * [413]10988 [m32r-elf] wrong blockmove code with -O3
     * [414]11805  [h8300-unknown-coff]  [H8300] ICE for simple code with
       -O2
     * [415]11902 [sh4] spec file improperly inserts rpath even when none
       needed
     * [416]11903  [sh4] -pthread fails to link due to error in spec file
       on sh4
     _________________________________________________________________

GCC 3.3.3

  Minor features

   In  addition  to the bug fixes documented below, this release contains
   few minor features such as:
     * Support for --with-sysroot
     * Support for automatic detection of executable stacks
     * Support for SSE3 instructions
     * Support for thread local storage debugging under GDB on S390

  Bug Fixes

   This  section  lists  the  problem  reports  (PRs) from [417]GCC's bug
   tracking  system that are known to be fixed in the 3.3.3 release. This
   list might not be complete (that is, it is possible that some PRs that
   have been fixed are not listed here).

    Bootstrap failures and issues

     * [418]11890 Building cross gcc-3.3.1 for sparc-sun-solaris2.6 fails
     * [419]12399  boehm-gc  fails  (when  building  a  cross  compiler):
       libtool unable to infer tagged configuration
     * [420]13068   mklibgcc.in   doesn't   handle  multi-level  multilib
       subdirectories properly

    Internal compiler errors (multi-platform)

     * [421]10060  ICE  (stack overflow) on huge file (300k lines) due to
       recursive behaviour of copy_rtx_if_shared, in emit_rtl.c
     * [422]10555 (c++) ICE on undefined template argument
     * [423]10706 (c++) ICE in mangle_class_name_for_template
     * [424]11496  (fortran) error in flow_loops_find when -funroll-loops
       active
     * [425]11741 ICE in pre_insert_copy_insn, in gcse.c
     * [426]12440 GCC crashes during compilation of quicktime4linux 2.0.0
     * [427]12632 (fortran) -fbounds-check ICE
     * [428]12712  (c++)  ICE  on  short legit C++ code fragment with gcc
       3.3.2
     * [429]12726 (c++) ICE (segfault) on trivial code
     * [430]12890 (c++) ICE on compilation of class with throwing method
     * [431]12900 (c++) ICE in rtl_verify_flow_info_1
     * [432]13060  (fortran)  ICE  in  fixup_var_refs_1, in function.c on
       correct code with -O2 -fno-force-mem
     * [433]13289 (c++) ICE in regenerate_decl_from_template on recursive
       template
     * [434]13318 ICE: floating point exception in the loop optimizer
     * [435]13392   (c++)   ICE  in  convert_from_eh_region_ranges_1,  in
       except.c
     * [436]13574  (c++)  invalid array default initializer in class lets
       gcc consume all memory and die
     * [437]13475 ICE on SIMD variables with partial value initialization
     * [438]13797 (c++) ICE on invalid template parameter
     * [439]13824 (java) gcj SEGV with simple .java program

    C and optimization bugs

     * [440]8776 loop invariants are not removed (most likely)
     * [441]10339   [sparc,ppc,ppc64]   Invalid  optimization:  replacing
       strncmp by memcmp
     * [442]11350 undefined labels with -Os -fPIC
     * [443]12826 Optimizer removes reference through volatile pointer
     * [444]12500 stabs debug info: void no longer a predefined / builtin
       type
     * [445]12941 builtin-bitops-1.c miscompilation (latent bug)
     * [446]12953 tree inliner bug (in inline_forbidden_p) and fix
     * [447]13041 linux-2.6/sound/core/oss/rate.c miscompiled
     * [448]13507 spurious printf format warning
     * [449]13382  Type  information  for const pointer disappears during
       optimization.
     * [450]13394 noreturn attribute ignored on recursive invokation
     * [451]13400 Compiled code crashes storing to read-only location
     * [452]13521 Endless loop in calculate_global_regs_live

    C++ compiler and library

   Some  of  the  bug fixes in this list were made to implement decisions
   that  the  ISO  C++  standards  committee  has made concerning several
   defect  reports  (DRs).  Links  in  the  list  below point to detailed
   discussion of the relevant defect report.
     * [453]2094  unimplemented:  use  of  `ptrmem_cst'  in template type
       unification
     * [454]2294 using declaration confusion
     * [455]5050  template  instantiation  depth exceeds limit: recursion
       problem?
     * [456]9371 Bad exception handling in
       i/ostream::operator>>/<<(streambuf*)
     * [457]9546 bad exception handling in ostream members
     * [458]10081  basic_ios::_M_cache_locale  leaves NULL members in the
       face of unknown locales
     * [459]10093 [460][DR 61] Setting failbit in exceptions doesn't work
     * [461]10095   istream::operator>>(int&)   sets   ios::badbit   when
       ios::failbit is set.
     * [462]11554   Warning  about  reordering  of  initializers  doesn't
       mention location of constructor
     * [463]12297 istream::sentry::sentry() handles eof() incorrectly.
     * [464]12352 Exception safety problems in src/localename.cc
     * [465]12438 Memory leak in locale::combine()
     * [466]12540 Memory leak in locale::locale(const char*)
     * [467]12594 DRs [468]60 [TC] and [469]63 [TC] not implemented
     * [470]12657 Resolution of [471]DR 292 (WP) still unimplemented
     * [472]12696  memory  eating  infinite  loop  in  diagnostics (error
       recovery problem)
     * [473]12815 Code compiled with optimization behaves unexpectedly
     * [474]12862  Conflicts  between typedefs/enums and namespace member
       declarations
     * [475]12926  Wrong  value after assignment in initialize list using
       bit-fields
     * [476]12967 Resolution of [477]DR 300 [WP] still unimplemented
     * [478]12971 Resolution of [479]DR 328 [WP] still unimplemented
     * [480]13007 basic_streambuf::pubimbue, imbue wrong
     * [481]13009  Implicitly-defined assignment operator writes to wrong
       memory
     * [482]13057 regparm attribute not applied to destructor
     * [483]13070 -Wformat option ignored in g++
     * [484]13081 forward template declarations in <complex> let inlining
       fail
     * [485]13239 Assertion does not seem to work correctly anymore
     * [486]13262  "xxx is private within this context" when initializing
       a self-contained template class
     * [487]13290 simple typo in concept checking for std::generate_n
     * [488]13323 Template code does not compile in presence of typedef
     * [489]13369 __verify_grouping (and __add_grouping?) not correct
     * [490]13371 infinite loop with packed struct and inlining
     * [491]13445 Template argument replacement "dereferences" a typedef
     * [492]13461 Fails to access protected-ctor from public constant
     * [493]13462 Non-standard-conforming type set::pointer
     * [494]13478  gcc  uses  wrong  constructor  to  initialize  a const
       reference
     * [495]13544 "conflicting types" for enums in different scopes
     * [496]13650     string::compare    should    not    (always)    use
       traits_type::length()
     * [497]13683 bogus warning about passing non-PODs through ellipsis
     * [498]13688  Derived class is denied access to protected base class
       member class
     * [499]13774 Member variable cleared in virtual multiple inheritance
       class
     * [500]13884 Protect sstream.tcc from extern template use

    Java compiler and library

     * [501]10746 [win32] garbage collection crash in GCJ

    Objective-C compiler and library

     * [502]11433  Crash  due to dereferencing null pointer when querying
       protocol

    Fortran compiler and library

     * [503]12633   logical   expression   gives  incorrect  result  with
       -fugly-logint option
     * [504]13037 [gcse-lm] g77 generates incorrect code
     * [505]13213  Hex constant problem when compiling with -fugly-logint
       and -ftypeless-boz

    x86-specific (Intel/AMD)

     * [506]4490 ICE with -m128bit-long-double
     * [507]12292  [x86_64]  ICE:  RTL  check: expected code `const_int',
       have `reg' in make_field_assignment, in combine.c
     * [508]12441 ICE: can't find a register to spill
     * [509]12943 array static-init failure under -fpic, -fPIC
     * [510]13608 Incorrect code with -O3 -ffast-math

    PowerPC-specific

     * [511]11598  testcase  gcc.dg/20020118-1.c  fails  runtime check of
       __attribute__((aligned(16)))
     * [512]11793 ICE in extract_insn, in recog.c (const_vector's)
     * [513]12467  vmsumubm  emitted  when  vmsummbm appropriate (typo in
       altivec.md)
     * [514]12537 g++ generates writeable text sections

    SPARC-specific

     * [515]12496  wrong  result  for __atomic_add(&value, -1) when using
       -O0 -m64
     * [516]12865 mprotect call to make trampoline executable may fail
     * [517]13354 ICE in sparc_emit_set_const32

    ARM-specific

     * [518]10467 [arm] ICE in pre_insert_copy_insn,

    ia64-specific

     * [519]11226 ICE passing struct arg with two floats
     * [520]11227 ICE for _Complex float, _Complex long double args
     * [521]12644 GCC 3.3.2 fails to compile glibc on ia64
     * [522]13149 build gcc-3.3.2 1305 error:unrecognizable insn
     * Various fixes for libunwind

    Alpha-specific

     * [523]12654 Incorrect comparison code generated for Alpha
     * [524]12965 SEGV+ICE in cc1plus on alpha-linux with -O2
     * [525]13031     ICE    (unrecognizable    insn)    when    building
       gnome-libs-1.4.2

    HPPA-specific

     * [526]11634 [hppa] ICE in verify_local_live_at_start, in flow.c
     * [527]12158 [hppa] compilation does not terminate at -O1

    S390-specific

     * [528]11992  Wrong built-in code for memcmp with length 1<<24: only
       (1<<24)-1 possible for CLCL-Instruction

    SH-specific

     * [529]9365 segfault in gen_far_branch (config/sh/sh.c)
     * [530]10392 optimizer generates faulty array indexing
     * [531]11322 SH profiler outputs multiple definitions of symbol
     * [532]13069 gcc/config/sh/rtems.h broken
     * [533]13302 Putting a va_list in a struct causes seg fault
     * [534]13585 Incorrect optimization of call to sfunc
     * Fix  inappropriately  exported  libgcc  functions  from the shared
       library

    Other embedded target specific

     * [535]8916 [mcore] unsigned char assign gets hosed.
     * [536]11576 [h8300] ICE in change_address_1, in emit-rtl.c
     * [537]13122  [h8300] local variable gets corrupted by function call
       when -fomit-frame-pointer is given
     * [538]13256 [cris] strict_low_part mistreated in delay slots
     * [539]13373   [mcore]   optimization   with  -frerun-cse-after-loop
       -fexpensive-optimizations produces wrong code on mcore

    GNU HURD-specific

     * [540]12561   gcc/config/t-gnu   needs   updating   to   work  with
       --with-sysroot

    Tru64 Unix specific

     * [541]6243  testsuite  fails  almost all tests due to no libintl in
       LD_LIBRARY_PATH during test.
     * [542]11397 weak aliases broken on Tru64 UNIX

    AIX-specific

     * [543]12505  build failure due to defines of uchar in cpphash.h and
       sys/types.h
     * [544]13150 WEAK symbols not exported by collect2

    IRIX-specific

     * [545]12666 fixincludes problem on IRIX 6.5.19m

    Solaris-specific

     * [546]12969 Including sys/byteorder.h breaks configure checks

    Testsuite problems (compiler is not affected)

     * [547]10819  testsuite  creates  CR+LF on compiler version lines in
       test summary files
     * [548]11612 abi_check not finding correct libgcc_s.so.1

    Miscellaneous

     * [549]13211 using -###, incorrect warnings about unused linker file
       are produced
     _________________________________________________________________

GCC 3.3.4

   This is the [550]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.3.4 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).
     _________________________________________________________________

GCC 3.3.5

   This is the [551]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.3.5 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).
     _________________________________________________________________

GCC 3.3.6

   This is the [552]list of problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.3.6 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been fixed are not listed here).
     _________________________________________________________________

   Please send FSF & GNU inquiries & questions to [553]gnu@gnu.org. There
   are also [554]other ways to contact the FSF.

   These pages are maintained by [555]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the   [556]GCC   manuals.   If   that   fails,   the
    [557]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer   mailing   list   at   [558]gcc@gnu.org   or
    [559]gcc@gcc.gnu.org. All of our lists have [560]public archives.

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 162. http://gcc.gnu.org/PR7611
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======================================================================
http://gcc.gnu.org/gcc-3.2/index.html

                           GCC 3.2 Release Series

   April 25, 2003

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.2.3.

   The  purpose  of  the  GCC  3.2  release series is to provide a stable
   platform  for  OS  distributors to use building their next releases. A
   primary  objective  was  to stabilize the C++ ABI; we believe that the
   interface  to  the  compiler  and  the  C++  standard  library are now
   relatively stable.

   Be  aware  that  C++  code compiled by GCC 3.2.x will (in general) not
   interoperate with code compiled by GCC 3.1.1 or earlier.

   Please  refer  to our [2]detailed list of news, caveats, and bug-fixes
   for further information.

Release History

   GCC 3.2.3
          April 25, 2003 ([3]changes)

   GCC 3.2.2
          February 5, 2003 ([4]changes)

   GCC 3.2.1
          November 19, 2002 ([5]changes)

   GCC 3.2
          August 14, 2002 ([6]changes)

References and Acknowledgements

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list  of [7]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features, improvements, bug fixes, and other changes
   as well as test results to GCC. This [8]amazing group of volunteers is
   what makes GCC successful.

   For  additional  information  about  GCC  please  refer  to the [9]GCC
   project web site or contact the [10]GCC development mailing list.

   To  obtain  GCC  please  use  [11]our mirror sites, one of the [12]GNU
   mirror sites, or [13]our CVS server.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There
   are also [15]other ways to contact the FSF.

   These pages are maintained by [16]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [17]GCC   manuals.   If   that   fails,   the
    [18]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [19]gcc@gnu.org   or
    [20]gcc@gcc.gnu.org. All of our lists have [21]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [22]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.2/changes.html
   3. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.3
   4. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.2
   5. http://gcc.gnu.org/gcc-3.2/changes.html#3.2.1
   6. http://gcc.gnu.org/gcc-3.2/changes.html#3.2
   7. http://gcc.gnu.org/gcc-3.2/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/index.html
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/mirrors.html
  12. http://www.gnu.org/order/ftp.html
  13. http://gcc.gnu.org/cvs.html
  14. mailto:gnu@gnu.org
  15. http://www.gnu.org/home.html#ContactInfo
  16. http://gcc.gnu.org/about.html
  17. http://gcc.gnu.org/onlinedocs/
  18. mailto:gcc-help@gcc.gnu.org
  19. mailto:gcc@gnu.org
  20. mailto:gcc@gcc.gnu.org
  21. http://gcc.gnu.org/lists.html
  22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.2/changes.html

                           GCC 3.2 Release Series
                      Changes, New Features, and Fixes

   The latest release in the 3.2 release series is [1]GCC 3.2.3.

Caveats and New Features

  Caveats

     * The    C++    compiler    does   not   correctly   zero-initialize
       pointers-to-data members. You must explicitly initialize them. For
       example:    int    S::*m(0);   will   work,   but   depending   on
       default-initialization  to  zero will not work. This bug cannot be
       fixed  in  GCC 3.2 without inducing unacceptable risks. It will be
       fixed in GCC 3.3.
     * This  GCC release is based on the GCC 3.1 sourcebase, and thus has
       all the [2]changes in the GCC 3.1 series. In addition, GCC 3.2 has
       a  number  of  C++  ABI fixes which make its C++ compiler generate
       binary  code which is incompatible with the C++ compilers found in
       earlier GCC releases, including GCC 3.1 and GCC 3.1.1.

  Frontend Enhancements

    C/C++/Objective-C

     * The  method of constructing the list of directories to be searched
       for  header  files  has been revised. If a directory named by a -I
       option  is  a  standard  system  include  directory, the option is
       ignored  to  ensure  that  the  default  search  order  for system
       directories  and  the special treatment of system header files are
       not defeated.
     * The  C  and  Objective-C  compilers  no  longer accept the "Naming
       Types"  extension  (typedef foo = bar); it was already unavailable
       in  C++.  Code  which  uses  it will need to be changed to use the
       "typeof"  extension  instead:  typedef  typeof(bar)  foo. (We have
       removed  this extension without a period of deprecation because it
       has  caused  the  compiler  to  crash since version 3.0 and no one
       noticed  until  very  recently.  Thus  we  conclude  it  is not in
       widespread use.)

    C++

     * GCC 3.2 fixed serveral differences between the C++ ABI implemented
       in  GCC  and  the  multi-vendor standard, but more have been found
       since  the release. 3.2.1 adds a new warning, -Wabi, to warn about
       code  which  is  affected by these bugs. We will fix these bugs in
       some  future  release,  once  we  are confident that all have been
       found;  until then, it is our intention to make changes to the ABI
       only  if  they  are  necessary  for correct compilation of C++, as
       opposed to conformance to the ABI documents.
     * For  details  on  how  to  build  an  ABI  compliant  compiler for
       GNU/Linux systems, check the [3]common C++ ABI page.

  New Targets and Target Specific Improvements

    IA-32

     * Fixed a number of bugs in SSE and MMX intrinsics.
     * Fixed  common  compiler  crashes  with SSE instruction set enabled
       (implied by -march=pentium3, pentium4, athlon-xp)
     * __m128 and __m128i is not 128bit aligned when used in structures.

    x86-64

     * A  bug  whereby the compiler could generate bad code for bzero has
       been fixed.
     * ABI fixes (implying ABI incompatibilities with previous version in
       some corner cases)
     * Fixed prefetch code generation
     _________________________________________________________________

GCC 3.2.3

   3.2.3  is  a bug fix release only; there are no new features that were
   not present in GCC 3.2.2.

  Bug Fixes

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.2.3 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been  fixed  are  not  listed  here), and some of the titles have been
   changed to make them more clear.

    Internal Compiler Errors (multi-platform)

     * [4]3782:  (c++)  -quiet  -fstats  produces a segmentation fault in
       cc1plus
     * [5]6440: (c++) template specializations cause ICE
     * [6]7050: (c++) ICE on: (i ? get_string() : throw)
     * [7]7741: ICE on conflicting types (make_decl_rtl in varasm.c)
     * [8]7982: (c++) ICE due to infinite recursion (using STL set)
     * [9]8068: exceedingly high (infinite) memory usage
     * [10]8178: ICE with __builtin_ffs
     * [11]8396: ICE in copy_to_mode_reg, in explow.c
     * [12]8674: (c++) ICE in cp_expr_size, in cp/cp-lang.c
     * [13]9768: ICE when optimizing inline code at -O2
     * [14]9798:     (c++)     Infinite     recursion    (segfault)    in
       cp/decl.c:push_using_directive with recursive using directives
     * [15]9799:  mismatching  structure initializer with nested flexible
       array member: ICE
     * [16]9928: ICE on duplicate enum declaration
     * [17]10114:  ICE  in  mem_loc_descriptor,  in  dwarf2out.c (affects
       sparc, alpha)
     * [18]10352: ICE in find_reloads_toplev
     * [19]10336: ICE with -Wunreachable-code

    C/optimizer bugs:

     * [20]8224: Incorrect joining of signed and unsigned division
     * [21]8613:   -O2  produces  wrong  code  with  builtin  strlen  and
       postincrements
     * [22]8828: gcc reports some code is unreachable when it is not
     * [23]9226: GCSE breaking argument passing
     * [24]9853: miscompilation of non-constant structure initializer
     * [25]9797: C99-style struct initializers are miscompiled
     * [26]9967:  Some  standard  C function calls should not be replaced
       when optimizing for size
     * [27]10116:  ce2: invalid merge of join_bb in the context of switch
       statements
     * [28]10171: wrong code for inlined function
     * [29]10175: -Wunreachable-code doesn't work for single lines

    C++ compiler and library:

     * [30]8316:  Confusing  diagnostic  for code that misuses conversion
       operators
     * [31]9169: filebuf output fails if codecvt<>::out returns noconv
     * [32]9420: incomplete type incorrectly reported
     * [33]9459:  typeof  in  return  type  specification of template not
       supported
     * [34]9507: filebuf::open handles ios_base::ate incorrectly
     * [35]9538: Out-of-bounds memory access in streambuf::sputbackc
     * [36]9602: Total confusion about template/friend/virtual/abstract
     * [37]9993:  destructor  not  called for local object created within
       and returned from infinite loop
     * [38]10167:    ieee_1003.1-2001   locale   specialisations   on   a
       glibc-2.3.2 system

    Java compiler and library:

     * [39]9652: libgcj build fails on irix6.5.1[78]
     * [40]10144:  gas  on  solaris  complains about bad .stabs lines for
       java, native as unaffected

    x86-specific (Intel/AMD):

     * [41]8746: gcc miscompiles Linux kernel ppa driver on x86
     * [42]9888: -mcpu=k6 -Os produces out of range loop instructions
     * [43]9638:  Cross-build  for  target i386-elf and i586-pc-linux-gnu
       failed
     * [44]9954: Cross-build for target i586-pc-linux-gnu (--with-newlib)
       failed

    SPARC-specific:

     * [45]7784: [Sparc] ICE in extract_insn, in recog.c
     * [46]7796:  sparc  extra failure with -m64 on execute/930921-1.c in
       unroll.c
     * [47]8281: ICE when compiling with -O2 -fPIC for Ultrasparc
     * [48]8366:  [Sparc]  C  testsuite  failure  with  -m64  -fpic -O in
       execute/loop-2d.c
     * [49]8726: gcc -O2 miscompiles Samba 2.2.7 on 32-bit sparc
     * [50]9414: Scheduling bug on Ultrasparc
     * [51]10067: GCC-3.2.2 outputs invalid asm on sparc64

    m68k-specific:

     * [52]7248: broken "inclusive or" code
     * [53]8343: m68k-elf/rtems ICE at instantiate_virtual_regs_1

    PowerPC-specific:

     * [54]9732: Wrong code with -O2 -fPIC
     * [55]10073: ICE: powerpc cannot split insn

    Alpha-specific:

     * [56]7702: optimization problem on a DEC alpha under OSF1
     * [57]9671: gcc.3.2.2 does not build on a HP Tru64 Unix v5.1B system

    HP-specific:

     * [58]8694: <string> breaks <ctype.h> on HP-UX 10.20 (DUP: 9275)
     * [59]9953:  (ada)  gcc 3.2.x can't build 3.3-branch ada on HP-UX 10
       (missing symbol)
     * [60]10271:  Floating point args don't get reloaded across function
       calls with -O2

    MIPS specific:

     * [61]6362:  mips-irix6  gcc-3.1  C testsuite failure with -mips4 in
       compile/920501-4.c

    CRIS specific:

     * [62]10377: gcc-3.2.2 creates bad assembler code for cris

    Miscellaneous and minor bugs:

     * [63]6955: collect2 says "core dumped" when there is no core
     _________________________________________________________________

GCC 3.2.2

   Beginning  with  3.2.2,  GCC's  Makefile suite supports redirection of
   make  install  by means of the DESTDIR variable. Parts of the GCC tree
   have  featured  that support long before, but now it is available even
   from the top level.

   Other than that, GCC 3.2.2 is a bug fix release only; there are no new
   features that were not present in GCC 3.2.1.

  Bug Fixes

   On  the  following  i386-based  systems GCC 3.2.1 broke the C ABI wrt.
   functions  returning structures: Cygwin, FreeBSD (GCC 3.2.1 as shipped
   with  FreeBSD  5.0  does  not have this problem), Interix, a.out-based
   Linux  and  NetBSD,  OpenBSD,  and  Darwin. GCC 3.2.2 reverts this ABI
   change,  and  thus  restores  ABI-compatibility with previous releases
   (except GCC 3.2.1) on these platforms.

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.2.2 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been  fixed  are  not  listed  here)  and some of the titles have been
   changed to make them more clear.

    Internal Compiler Errors (multi-platform)

     * [64]5919:  (c++)  ICE  when  passing  variable  array  to template
       function
     * [65]7129:  (c++)  ICE  with  min/max assignment operators (<?= and
       >?=)
     * [66]7507:  ICE  with  -O2  when  address  of  called function is a
       complicated expression
     * [67]7622:  ICE  with nested inline functions if function's address
       is taken
     * [68]7681:  (fortran)  ICE in compensate_edge, in reg-stack.c (also
       PR [69]9258)
     * [70]8031:  (c++)  ICE  in  code comparing typeids and casting from
       virtual base
     * [71]8275: ICE in simplify_subreg
     * [72]8332: (c++) builtin strlen/template interaction causes ICE
     * [73]8372: (c++) ICE on explicit call of destructor
     * [74]8439: (c, not c++) empty struct causes ICE
     * [75]8442: (c++) ICE with nested template classes
     * [76]8518: ICE when compiling mplayer ("extern inline" issue)
     * [77]8615:  (c++) ICE with out-of-range character constant template
       argument
     * [78]8663: (c++) ICE in cp_expr_size, at cp-lang.c:307
     * [79]8799: (c++) ICE: error reporting routines re-entered
     * [80]9328: (c++) ICE with typeof(X) for overloaded X
     * [81]9465: (preprocessor) cpp -traditional ICE on null bytes

    C++ (compiler and library) bugs

     * [82]47: scoping in nested classes is broken
     * [83]6745: problems with iostream rdbuf() member function
     * [84]8214:  conversion  from  const  char* const to char* sometimes
       accepted illegally
     * [85]8493:  builtin  strlen  and  overload  resolution (same bug as
       [86]8332)
     * [87]8503: strange behaviour of function types
     * [88]8727:  compiler  confused  by  inheritance  from  an anonymous
       struct
     * [89]7445:    poor   performance   of   std::locale::classic()   in
       multi-threaded applications
     * [90]8230: mishandling of overflow in vector<T>::resize
     * [91]8399: sync_with_stdio(false) breaks unformatted input
     * [92]8662:  illegal  access  of  private member of unnamed class is
       accepted
     * [93]8707: "make distclean" fails in libstdc++-v3 directory
     * [94]8708: __USE_MALLOC doesn't work
     * [95]8790: Use of non-thread-safe strtok in src/localename.cc
     * [96]8887: Bug in date formats with --enable-clocale=generic
     * [97]9076: Call Frame Instructions are not handled correctly during
       unwind operation
     * [98]9151: std::setprecision limited to 16 digits when outputting a
       double to a stream
     * [99]9168: codecvt<char, char, mbstate_t> overwrites output buffers
     * [100]9269:  libstdc++ headers: explicit specialization of function
       must precede its first use
     * [101]9322:  return  value of basic_streambuf<>::getloc affected by
       locale::global
     * [102]9433: segfault in runtime support for dynamic_cast

    C and optimizer bugs

     * [103]8032:  GCC  incorrectly  initializes static structs that have
       flexible arrays
     * [104]8639: simple arithmetic expression broken
     * [105]8794: optimization improperly eliminates certain expressions
     * [106]8832: traditional "asm volatile" code is illegally optimized
     * [107]8988:  loop  optimizer  bug: with -O2, code is generated that
       segfaults (found on i386, bug present for all platforms)
     * [108]9492: structure copy clobbers subsequent stores to structure

    Objective-C bugs

     * [109]9267:   Objective-C  parser  won't  build  with  newer  bison
       versions (e.g. 1.875)

    Ada bugs

     * [110]8344:  Ada build problem due to conflict between gcc/final.o,
       gcc/ada/final.o

    Preprocessor bugs

     * [111]8524: _Pragma within macros is improperly expanded
     * [112]8880: __WCHAR_TYPE__ macro incorrectly set to "long int" with
       -fshort-wchar

    ARM-specific

     * [113]9090: arm ICE with >= -O2; regression from gcc-2.95

    x86-specific (Intel/AMD)

     * [114]8588:   ICE   in   extract_insn,   at   recog.c:NNNN   (shift
       instruction)
     * [115]8599: loop unroll bug with -march=k6-3
     * [116]9506:  ABI  breakage  in  structure  return  (affects BSD and
       Cygwin, but not GNU/Linux)

    FreeBSD 5.0 specific

     * [117]9484: GCC 3.2.1 Bootstrap failure on FreeBSD 5.0

    RTEMS-specific

     * [118]9292: hppa1.1-rtems configurery problems
     * [119]9293: [m68k-elf/rtems] config/m68k/t-crtstuff bug
     * [120]9295: [mips-rtems] config/mips/rtems.h init/fini issue
     * [121]9296: gthr-rtems regression
     * [122]9316: powerpc-rtems: extending multilibs

    HP-PA specific

     * [123]9493: ICE with -O2 when building a simple function

    Documentation

     * [124]7341: hyperlink to gcov in GCC documentation doesn't work
     * [125]8947: Please add a warning about "-malign-double" in docs
     * [126]7448, [127]8882: typo cleanups
     _________________________________________________________________

GCC 3.2.1

   3.2.1  adds  a  new  warning,  -Wabi.  This  option warns when GNU C++
   generates  code  that  is  known  not to be binary-compatible with the
   vendor-neutral  ia32/ia64 ABI. Please consult the GCC manual, included
   in the distribution, for details.

   This  release  also  removes an old GCC extension, "naming types", and
   the  documentation now directs users to use a different GCC extension,
   __typeof__,  instead.  The  feature  had  evidently  been broken for a
   while.

   Otherwise,  3.2.1  is a bug fix release only; other than bug fixes and
   the new warning there are no new features that were not present in GCC
   3.2.

   In  addition,  the  previous fix for [128]PR 7445 (poor performance of
   std::locale::classic()  in  multi-threaded  applications) was reverted
   ("unfixed"), because the "fix" was not thread-safe.

  Bug Fixes

   This  section  lists the problem reports (PRs) from GCC's bug tracking
   system  that  are  known  to  be fixed in the 3.2.1 release. This list
   might not be complete (that is, it is possible that some PRs that have
   been  fixed  are  not  listed here). As you can see, the number of bug
   fixes  is  quite  large,  so  it is strongly recommended that users of
   earlier GCC 3.x releases upgrade to GCC 3.2.1.

    Internal Compiler Errors (multi-platform)

     * [129]2521: (c++) ICE in build_ptrmemfunc, in cp/typeck.c
     * [130]5661:  (c++)  ICE  instantiating template on array of unknown
       size (bad code)
     * [131]6419:  (c++)  ICE in make_decl_rtl for "longest" attribute on
       64-bit platforms
     * [132]6994: (c++) ICE in find_function_data
     * [133]7150: preprocessor: GCC -dM -E gives an ICE
     * [134]7160: ICE when optimizing branches without a return value
     * [135]7228:  (c++)  ICE  when  using  member  template and template
       function
     * [136]7266: (c++) ICE with -pedantic on missing typename
     * [137]7353: ICE from use of "Naming Types" extension, see above
     * [138]7411: ICE in instantiate_virtual_regs_1, in function.c
     * [139]7478: (c++) ICE on static_cast inside template
     * [140]7526:  preprocessor  core  dump  when _Pragma implies #pragma
       dependency
     * [141]7721: (c++) ICE on simple (but incorrect) template ([142]7803
       is a duplicate)
     * [143]7754: (c++) ICE on union with template parameter
     * [144]7788:  (c++)  redeclaring a definition as an incomplete class
       causes ICE
     * [145]8031: (c++) ICE in comptypes, in cp/typeck.c
     * [146]8055:  preprocessor  dies  with  SIG11  when building FreeBSD
       kernel
     * [147]8067:  (c++)  ICE  due  to  mishandling  of  __FUNCTION__ and
       related variables
     * [148]8134: (c++) ICE in force_store_init_value on legal code
     * [149]8149: (c++) ICE on incomplete type
     * [150]8160:  (c++)  ICE in build_modify_expr, in cp/typeck.c: array
       initialization

    C++ (compiler and library) bugs

     * [151]5607: No pointer adjustment in covariant return types
     * [152]6579:  Infinite  loop  with  statement  expressions in member
       initialization
     * [153]6803: Default copy constructor bug in GCC 3.1
     * [154]7176: g++ confused by friend and static member with same name
     * [155]7188:  Segfault with template class and recursive (incorrect)
       initializer list
     * [156]7306:  Regression: GCC 3.x fails to compile code with virtual
       inheritance if a method has a variable number of arguments
     * [157]7461:  ctype<char>::classic_table()  returns  offset array on
       Cygwin
     * [158]7524: f(const float arg[3]) fails
     * [159]7584: Erroneous ambiguous base error on using declaration
     * [160]7676: Member template overloading problem
     * [161]7679: infinite loop when a right parenthesis is missing
     * [162]7811: default locale not taken from environment
     * [163]7961:   compare(   char   *)   implemented   incorrectly   in
       basic_string<>
     * [164]8071:  basic_ostream::operator<<(streambuf*) loops forever if
       streambuf::underflow()   leaves   gptr()  NULL  (dups:  [165]8127,
       [166]6745)
     * [167]8096:   deque::at()   throws   std::range_error   instead  of
       std::out_of_range
     * [168]8127: cout << cin.rdbuf() infinite loop
     * [169]8218:  Excessively  large  memory  consumed  for classes with
       large array members
     * [170]8287:  GCC  3.2:  Destructor called for non-constructed local
       object
     * [171]8347:  empty  vector range used in string construction causes
       core dump
     * [172]8348:  fail() flag is set in istringstream when eof() flag is
       set
     * [173]8391: regression: infinite loop in cp/decl2.c(finish_file)

    C and optimizer bugs

     * [174]6627:  -fno-align-functions  doesn't seem to disable function
       alignment
     * [175]6631: life_analysis misoptimizes code to initialize fields of
       a structure
     * [176]7102: unsigned char division results in floating exception
     * [177]7120:   Run   once   loop   should   *always*   be   unrolled
       (pessimization)
     * [178]7209: Bug involving array referencing and ?: operator
     * [179]7515: invalid inlining of global function with -O3
     * [180]7814: incorrect scheduling for glibc-2.2.92 strcpy test
     * [181]8467: bug in sibling call optimization

    Preprocessor bugs

     * [182]4890:   incorrect   line   markers   from   the   traditional
       preprocessor
     * [183]7357:  -M  option  omits  system headers files (making it the
       same as -MM)
     * [184]7358: Changes to Sun's make Dependencies
     * [185]7602: C++ header files found in CPLUS_INCLUDE_PATH treated as
       C headers
     * [186]7862: Interrupting GCC -MD removes .d file but not .o
     * [187]8190: Failed compilation deletes -MD dependency file
     * [188]8524: _Pragma within macro is improperly expanded

    x86 specific (Intel/AMD)

     * [189]5351:   (i686-only)  function  pass-by-value  structure  copy
       corrupts stack ([190]7591 is a duplicate)
     * [191]6845,    [192]7034,    [193]7124,   [194]7174:   ICE's   with
       -march=pentium3/pentium2/athlon (these are all the same underlying
       bug, in MMX register use)
     * [195]7134,  [196]7375,  [197]7390:  ICE  with -march=athlon (maybe
       same as above?)
     * [198]6890: xmmintrin.h, _MM_TRANSPOSE4_PS is broken
     * [199]6981: wrong code in 64-bit manipulation on x86
     * [200]7242:      GCC      -mcpu=pentium[23]      doesn't     define
       __tune_pentiumpro__ macro
     * [201]7396:  ix86: cmpgt_ss, cmpge_ss, cmpngt_ss, and cmpnge_ss SSE
       intrinsics are broken
     * [202]7630:  GCC  3.2  breaks  on  Mozilla  1.0's  JS  sources with
       -march=pentium4
     * [203]7693: Typo in i386 mmintrin.h header
     * [204]7723: ICE - Pentium3 sse - GCC 3.2
     * [205]7951: ICE on -march=pentium4 -O2 -mfpmath=sse
     * [206]8146: (i686 only) gcc 3.2 miscompiles gcc 2.95.3

    PowerPC specific

     * [207]5967: GCC bug when profiling nested functions on powerpc
     * [208]6984:  wrong  code  generated with -O2, -O3, -Os for do-while
       loop on PowerPC
     * [209]7114: PowerPC: ICE building strcoll.op from glibc-2.2.5
     * [210]7130:  miscompiled  code  for  GCC-3.1  in powerpc linux with
       -funroll-all-loops
     * [211]7133: PowerPC ICE: unrecognizable insn
     * [212]7380: ICE in extract_insn, at recog.c:2148
     * [213]8252: ICE on Altivec code with optimization turned on
     * [214]8451: Altivec ICE in GCC 3.2

    HP/PA specific

     * [215]7250: __ashrdi3 returns wrong value on 32 bit hppa

    SPARC specific

     * [216]6668: when using --disable-multilib, libgcc_s.so is installed
       in the wrong place on sparc-solaris
     * [217]7151: ICE when compiling for UltraSPARC
     * [218]7335:  SPARC:  ICE  in verify_wide_reg (flow.c:557) with long
       double and -O1
     * [219]7842: [REGRESSION] SPARC code gen bug

    ARM specific

     * [220]7856: [arm] invalid offset in constant pool reference
     * [221]7967: optimization produces wrong code (ARM)

    Alpha specific

     * [222]7374: __builtin_fabsl broken on alpha

    IBM s390 specific

     * [223]7370: ICE in fixup_var_refs_1 on s390x
     * [224]7409: loop optimization bug on s390x-linux-gnu
     * [225]8232: s390x: ICE when using bcmp with int length argument

    SCO specific

     * [226]7623: SCO OpenServer build fails with machmode.def: undefined
       symbol: BITS_PER_UNIT

    m68k/Coldfire specific

     * [227]8314:  crtbegin,  crtend  need  to  be  multilib'ed  for this
       platform

    Documentation

     * [228]761: Document some undocumented options
     * [229]5610:  Fix  documentation  about  invoking  SSE  instructions
       (-mfpmath=sse)
     * [230]7484: List -Wmissing-declarations as C-only option
     * [231]7531: -mcmodel not documented for x86-64
     * [232]8120: Update documentation of bad use of ##
     _________________________________________________________________

GCC 3.2

   3.2  is  a  small  bug  fix  release,  but  there  is  a change to the
   application  binary  interface  (ABI),  hence the change to the second
   part of the version number.

   The main purpose of the 3.2 release is to correct a couple of problems
   in  the  C++  ABI,  with the intention of providing a stable interface
   going forward.  Accordingly, 3.2 is only a small change to 3.1.1.

  Bug Fixes

    C++

     * [233]7320: g++ 3.2 relocation problem
     * [234]7470:  vtable:  virtual  function pointers not in declaration
       order

    libstdc++

     * [235]6410: Trouble with non-ASCII monetary symbols and wchar_t
     * [236]6503,   [237]6642,  [238]7186:  Problems  with  comparing  or
       subtracting various types of const and non-const iterators
     * [239]7216: ambiguity with basic_iostream::traits_type
     * [240]7220: problem with basic_istream::ignore(0,delimiter)
     * [241]7222: locale::operator==() doesn't work on std::locale("")
     * [242]7286: placement operator delete issue
     * [243]7442: cxxabi.h does not match the C++ ABI
     * [244]7445:   poor   performance   of   std::locale::classic()   in
       multi-threaded applications

    x86-64 specific

     * [245]7291: off-by-one in generated inline bzero code for x86-64
     _________________________________________________________________

   Please send FSF & GNU inquiries & questions to [246]gnu@gnu.org. There
   are also [247]other ways to contact the FSF.

   These pages are maintained by [248]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the   [249]GCC   manuals.   If   that   fails,   the
    [250]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer   mailing   list   at   [251]gcc@gnu.org   or
    [252]gcc@gcc.gnu.org. All of our lists have [253]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

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   Last modified 2005-07-11 [254]Valid XHTML 1.0 

References

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======================================================================
http://gcc.gnu.org/gcc-3.1/index.html

                                  GCC 3.1

   July 27, 2002

   The  [1]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.1.1.

   The links below still apply to GCC 3.1.1.

   May 15, 2002

   The  [2]GNU project and the GCC developers are pleased to announce the
   release of GCC 3.1.

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   A  list  of [3]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  [4]new  features,  improvements,  bug  fixes,  and  other
   changes  as  well  as  test  results  to GCC. This [5]amazing group of
   volunteers is what makes GCC successful.

   For  additional  information  about  GCC  please  refer  to the [6]GCC
   project web site or contact the [7]GCC development mailing list.

   To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
   sites, or [10]our CVS server.
     _________________________________________________________________
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
   are also [12]other ways to contact the FSF.

   These pages are maintained by [13]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [14]GCC   manuals.   If   that   fails,   the
    [15]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [16]gcc@gnu.org   or
    [17]gcc@gcc.gnu.org. All of our lists have [18]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [19]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://www.gnu.org/
   3. http://gcc.gnu.org/gcc-3.1/buildstat.html
   4. http://gcc.gnu.org/gcc-3.1/changes.html
   5. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   6. http://gcc.gnu.org/index.html
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/mirrors.html
   9. http://www.gnu.org/order/ftp.html
  10. http://gcc.gnu.org/cvs.html
  11. mailto:gnu@gnu.org
  12. http://www.gnu.org/home.html#ContactInfo
  13. http://gcc.gnu.org/about.html
  14. http://gcc.gnu.org/onlinedocs/
  15. mailto:gcc-help@gcc.gnu.org
  16. mailto:gcc@gnu.org
  17. mailto:gcc@gcc.gnu.org
  18. http://gcc.gnu.org/lists.html
  19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.1/changes.html

                           GCC 3.1 Release Series
                      Changes, New Features, and Fixes

Additional changes in GCC 3.1.1

     * A  bug  related to how structures and unions are returned has been
       fixed for powerpc-*-netbsd*.
     * An  important  bug in the implementation of -fprefetch-loop-arrays
       has  been  fixed.  Previously  the  optimization prefetched random
       blocks of memory for most targets except for i386.
     * The  Java compiler now compiles Java programs much faster and also
       works with parallel make.
     * Nested functions have been fixed for mips*-*-netbsd*.
     * Some  missing  floating point support routines have beed added for
       mips*-*-netbsd*.
     * This  [1]message gives additional information about the bugs fixed
       in this release.

Caveats

     * The -traditional C compiler option has been deprecated and will be
       removed  in GCC 3.3. (It remains possible to preprocess non-C code
       with the traditional preprocessor.)
     * The  default  debugging  format  for most ELF platforms (including
       GNU/Linux  and  FreeBSD; notable exception is Solaris) has changed
       from stabs to DWARF2. This requires GDB 5.1.1 or later.

General Optimizer Improvements

     * Jan  Hubicka, SuSE Labs, together with Richard Henderson, Red Hat,
       and  Andreas  Jaeger, SuSE Labs, has contributed [2]infrastructure
       for profile driven optimizations.
       Options  -fprofile-arcs and -fbranch-probabilities can now be used
       to  improve  speed  of  the generated code by profiling the actual
       program  behaviour on typical runs. In the absence of profile info
       the compiler attempts to guess the profile statically.
     * [3]SPEC2000  and  SPEC95  benchmark  suites  are now used daily to
       monitor performance of the generated code.
       According  to  the  SPECInt2000  results on an AMD Athlon CPU, the
       code generated by GCC 3.1 is 6% faster on the average (8.2% faster
       with  profile  feedback) compared to GCC 3.0. The code produced by
       GCC  3.0  is about 2.1% faster compared to 2.95.3. Tests were done
       using the -O2 -march=athlon command-line options.
     * Alexandre  Oliva,  of  Red  Hat, has generalized the tree inlining
       infrastructure  developed  by  CodeSourcery, LLC for the C++ front
       end,  so  that  it  is  now  used in the C front end too. Inlining
       functions as trees exposes them earlier to the compiler, giving it
       more opportunities for optimization.
     * Support  for  data  prefetching instructions has been added to the
       GCC  back  end  and  several  targets.  A  new  __builtin_prefetch
       intrinsic  is available to explicitly insert prefetch instructions
       and experimental support for loop array prefetching has been added
       (see -fprefetch-loop-array documentation).
     * Support  for  emitting  debugging  information for macros has been
       added for DWARF2. It is activated using -g3.

New Languages and Language specific improvements

  C/C++

     * A few more [4]ISO C99 features.
     * The  preprocessor  is  10-50%  faster than the preprocessor in GCC
       3.0.
     * The  preprocessor's  symbol  table has been merged with the symbol
       table of the C, C++ and Objective-C front ends.
     * The preprocessor consumes less memory than the preprocessor in GCC
       3.0,  often  significantly so. On normal input files, it typically
       consumes less memory than pre-3.0 cccp-based GCC, too.

  C++

     * -fhonor-std  and  -fno-honor-std have been removed. -fno-honor-std
       was  a  workaround  to  allow  std compliant code to work with the
       non-std compliant libstdc++-v2. libstdc++-v3 is std compliant.
     * The  C++ ABI has been fixed so that void (A::*)() const is mangled
       as  "M1AKFvvE", rather than "MK1AFvvE" as before. This change only
       affects pointer to cv-qualified member function types.
     * The C++ ABI has been changed to correctly handle this code:
    struct A {
      void operator delete[] (void *, size_t);
    };

    struct B : public A {
    };

    new B[10];

       The amount of storage allocated for the array will be greater than
       it  was  in  3.0,  in order to store the number of elements in the
       array, so that the correct size can be passed to operator delete[]
       when  the  array  is  deleted.  Previously,  the  value  passed to
       operator delete[] was unpredictable.
       This  change  will  only  affect code that declares a two-argument
       operator delete[] with a second parameter of type size_t in a base
       class, and does not override that definition in a derived class.
     * The C++ ABI has been changed so that:
    struct A {
      void operator delete[] (void *, size_t);
      void operator delete[] (void *);
    };

       does  not  cause unnecessary storage to be allocated when an array
       of A objects is allocated.
       This  change  will  only  affect  code that declares both of these
       forms  of  operator  delete[],  and declared the two-argument form
       before the one-argument form.
     * The C++ ABI has been changed so that when a parameter is passed by
       value,  any cleanup for that parameter is performed in the caller,
       as  specified by the ia64 C++ ABI, rather than the called function
       as  before. As a result, classes with a non-trivial destructor but
       a  trivial  copy  constructor  will  be  passed  and  returned  by
       invisible reference, rather than by bitwise copy as before.
     * G++  now  supports the "named return value optimization": for code
       like
    A f () {
      A a;
      ...
      return a;
    }

       G++  will  allocate a in the return value slot, so that the return
       becomes  a  no-op.  For this to work, all return statements in the
       function must return the same variable.
     * Improvements  to the C++ library are listed in [5]the libstdc++-v3
       FAQ.

  Objective-C

     * Annoying  linker  warnings (due to incorrect code being generated)
       have been fixed.
     * If a class method cannot be found, the compiler no longer issues a
       warning  if  a  corresponding  instance  method exists in the root
       class.
     * Forward @protocol declarations have been fixed.
     * Loading  of  categories  has been fixed in certain situations (GNU
       run time only).
     * The  class  lookup  in  the run-time library has been rewritten so
       that  class  method dispatch is more than twice as fast as it used
       to be (GNU run time only).

  Java

     * libgcj   now  includes  RMI,  java.lang.ref.*,  javax.naming,  and
       javax.transaction.
     * Property  files  and  other  system resources can be compiled into
       executables which use libgcj using the new gcj --resource feature.
     * libgcj  has  been ported to more platforms. In particular there is
       now a mostly-functional mingw32 (Windows) target port.
     * JNI   and   CNI   invocation   interfaces   were  implemented,  so
       gcj-compiled Java code can now be called from a C/C++ application.
     * gcj  can  now use builtin functions for certain known methods, for
       instance Math.cos.
     * gcj  can  now automatically remove redundant array-store checks in
       some common cases.
     * The  --no-store-checks  optimization option was added. This can be
       used  to  omit runtime store checks for code which is known not to
       throw ArrayStoreException
     * The  following  third  party  interface  standards  were  added to
       libgcj: org.w3c.dom and org.xml.sax.
     * java.security  has been merged with GNU Classpath. The new package
       is now JDK 1.2 compliant, and much more complete.
     * A bytecode verifier was added to the libgcj interpreter.
     * java.lang.Character  was  rewritten to comply with the Unicode 3.0
       standard, and improve performance.
     * Partial support for many more locales was added to libgcj.
     * Socket timeouts have been implemented.
     * libgcj  has been merged into a single shared library. There are no
       longer  separate  shared  libraries  for the garbage collector and
       zlib.
     * Several performance improvements were made to gcj and libgcj:
          + Hash synchronization (thin locks)
          + A special allocation path for finalizer-free objects
          + Thread-local allocation
          + Parallel GC, and other GC tweaks

  Fortran

   Fortran improvements are listed in [6]the Fortran documentation.

  Ada

   [7]Ada  Core  Technologies, Inc, has contributed its GNAT Ada 95 front
   end  and  associated tools. The GNAT compiler fully implements the Ada
   language as defined by the ISO/IEC 8652 standard.

   Please note that the integration of the Ada front end is still work in
   progress.

New Targets and Target Specific Improvements

     * Hans-Peter  Nilsson  has  contributed  a  port to [8]MMIX, the CPU
       architecture  used in new editions of Donald E. Knuth's The Art of
       Computer Programming.
     * [9]Axis  Communications  has  contributed its port to the CRIS CPU
       architecture,  used  in  the  ETRAX  system-on-a-chip  series. See
       [10]Axis' developer site for technical information.
     * Alexandre  Oliva,  of  Red  Hat,  has  contributed  a  port to the
       [11]SuperH  SH5 64-bit RISC microprocessor architecture, extending
       the existing SH port.
     * UltraSPARC  is  fully  supported  in  64-bit mode. The option -m64
       enables it.
     * For  compatibility  with the Sun compiler #pragma redefine_extname
       has been implemented on Solaris.
     * The x86 back end has had some noticeable work done to it.
          + SuSE  Labs  developers  Jan  Hubicka,  Bo Thorsen and Andreas
            Jaeger   have   contributed   a   port   to  the  AMD  x86-64
            architecture.    For   more   information   on   x86-64   see
            [12]http://www.x86-64.org.
          + The   compiler  now  supports  MMX,  3DNow!,  SSE,  and  SSE2
            instructions.  Options -mmmx, -m3dnow, -msse, and -msse2 will
            enable  the respective instruction sets. Intel C++ compatible
            MMX/3DNow!/SSE  intrinsics  are  implemented. SSE2 intrinsics
            will be added in next major release.
          + Following  those improvements, targets for Pentium MMX, K6-2,
            K6-3,  Pentium III, Pentium 4, and Athlon 4 Mobile/XP/MP were
            added.  Refer  to  the  documentation  on  -march= and -mcpu=
            options for details.
          + For  those  targets  that support it, -mfpmath=sse will cause
            the  compiler  to generate SSE/SSE2 instructions for floating
            point  math  instead  of x87 instructions. Usually, this will
            lead  to  quicker  code  -- especially on the Pentium 4. Note
            that only scalar floating point instructions are used and GCC
            does not exploit SIMD features yet.
          + Prefetch  support  has been added to the Pentium III, Pentium
            4, K6-2, K6-3, and Athlon series.
          + Code  generated for floating point to integer conversions has
            been  improved  leading  to  better  performance  of  many 3D
            applications.
     * The PowerPC back end has added 64-bit PowerPC GNU/Linux support.
     * C++ support for AIX has been improved.
     * Aldy Hernandez, of Red Hat, Inc, has contributed extensions to the
       PowerPC  port supporting the AltiVec programming model (SIMD). The
       support,  though presently useful, is experimental and is expected
       to  stabilize  for  3.2.  The  support  is  written  to conform to
       Motorola's AltiVec specs. See -maltivec.

Obsolete Systems

   Support  for  a  number of older systems has been declared obsolete in
   GCC  3.1. Unless there is activity to revive them, the next release of
   GCC will have their sources permanently removed.

   All  configurations of the following processor architectures have been
   declared obsolete:
     * MIL-STD-1750A, 1750a-*-*
     * AMD A29k, a29k-*-*
     * Convex, c*-convex-*
     * Clipper, clipper-*-*
     * Elxsi, elxsi-*-*
     * Intel i860, i860-*-*
     * Sun picoJava, pj-*-* and pjl-*-*
     * Western Electric 32000, we32k-*-*

   Most configurations of the following processor architectures have been
   declared  obsolete, but we are preserving a few systems which may have
   active  developers.  It  is  unlikely  that the remaining systems will
   survive much longer unless we see definite signs of port activity.
     * Motorola 88000 except
          + Generic a.out, m88k-*-aout*
          + Generic SVR4, m88k-*-sysv4
          + OpenBSD, m88k-*-openbsd*
     * NS32k except
          + NetBSD, ns32k-*-netbsd*
          + OpenBSD, ns32k-*-openbsd*.
     * ROMP except
          + OpenBSD, romp-*-openbsd*.

   Finally, only some configurations of these processor architectures are
   being obsoleted.
     * Alpha:
          + OSF/1,  alpha*-*-osf[123]*. (Digital Unix and Tru64 Unix, aka
            alpha*-*-osf[45], are still supported.)
     * ARM:
          + RISCiX, arm-*-riscix*.
     * i386:
          + 386BSD, i?86-*-bsd*
          + Chorus, i?86-*-chorusos*
          + DG/UX, i?86-*-dgux*
          + FreeBSD 1.x, i?86-*-freebsd1.*
          + IBM AIX, i?86-*-aix*
          + ISC UNIX, i?86-*-isc*
          + Linux with pre-BFD linker, i?86-*-linux*oldld*
          + NEXTstep, i?86-next-*
          + OSF UNIX, i?86-*-osf1* and i?86-*-osfrose*
          + RTEMS/coff, i?86-*-rtemscoff*
          + RTEMS/go32, i?86-go32-rtems*
          + Sequent/BSD, i?86-sequent-bsd*
          + Sequent/ptx   before  version  3,  i?86-sequent-ptx[12]*  and
            i?86-sequent-sysv3*
          + SunOS, i?86-*-sunos*
     * Motorola 68000:
          + Altos, m68[k0]*-altos-*
          + Apollo, m68[k0]*-apollo-*
          + Apple A/UX, m68[k0]*-apple-*
          + Bull, m68[k0]*-bull-*
          + Convergent, m68[k0]*-convergent-*
          + Generic SVR3, m68[k0]*-*-sysv3*
          + ISI, m68[k0]*-isi-*
          + LynxOS, m68[k0]*-*-lynxos*
          + NEXT, m68[k0]*-next-*
          + RTEMS/coff, m68[k0]*-*-rtemscoff*
          + Sony, m68[k0]*-sony-*
     * MIPS:
          + DEC Ultrix, mips-*-ultrix* and mips-dec-*
          + Generic BSD, mips-*-bsd*
          + Generic System V, mips-*-sysv*
          + IRIX before version 5, mips-sgi-irix[1234]*
          + RiscOS, mips-*-riscos*
          + Sony, mips-sony-*
          + Tandem, mips-tandem-*
     * SPARC:
          + RTEMS/a.out, sparc-*-rtemsaout*.

Documentation improvements

     * The  old  manual ("Using and Porting the GNU Compiler Collection")
       has  been  replaced  by  a  users  manual ("Using the GNU Compiler
       Collection")  and  a  separate  internals  reference  manual ("GNU
       Compiler Collection Internals").
     * More complete and much improved documentation about GCC's internal
       representation used by the C and C++ front ends.
     * Many cleanups and improvements in general.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There
   are also [14]other ways to contact the FSF.

   These pages are maintained by [15]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [16]GCC   manuals.   If   that   fails,   the
    [17]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [18]gcc@gnu.org   or
    [19]gcc@gcc.gnu.org. All of our lists have [20]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [21]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/ml/gcc/2002-07/msg01208.html
   2. http://gcc.gnu.org/news/profiledriven.html
   3. http://gcc.gnu.org/benchmarks/
   4. http://gcc.gnu.org/gcc-3.1/c99status.html
   5. http://gcc.gnu.org/onlinedocs/libstdc++/faq/index.html#4_1
   6. http://gcc.gnu.org/onlinedocs/g77/News.html
   7. http://www.gnat.com/
   8. http://www-cs-faculty.stanford.edu/~knuth/mmix.html
   9. http://www.axis.com/
  10. http://developer.axis.com/
  11. http://www.superh.com/
  12. http://www.x86-64.org/
  13. mailto:gnu@gnu.org
  14. http://www.gnu.org/home.html#ContactInfo
  15. http://gcc.gnu.org/about.html
  16. http://gcc.gnu.org/onlinedocs/
  17. mailto:gcc-help@gcc.gnu.org
  18. mailto:gcc@gnu.org
  19. mailto:gcc@gcc.gnu.org
  20. http://gcc.gnu.org/lists.html
  21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/gcc-3.0.html

                                 GCC 3.0.4

   February 20, 2002

   The  [1]GNU project and the GCC developers are pleased to announce the
   release  of  GCC  3.0.4,  which  is  a bug-fix release for the GCC 3.0
   series.

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   GCC  3.0.x  has  several new optimizations, new targets, new languages
   and  many  other  new features, relative to GCC 2.95.x. See the [2]new
   features page for a more complete list.

   A  list  of [3]successful builds is updated as new information becomes
   available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features,  test  results, bugfixes, etc to GCC. This
   [4]amazing group of volunteers is what makes GCC successful.

   And  finally,  we  can't  in  good  conscience  fail  to  mention some
   [5]caveats to using GCC 3.0.x.

   For  additional  information  about  GCC  please  refer  to the [6]GCC
   project web site or contact the [7]GCC development mailing list.

   To obtain GCC please use [8]our mirror sites, one of the [9]GNU mirror
   sites, or [10]our CVS server.
     _________________________________________________________________

Previous 3.0.x Releases

   December 20, 2001: GCC 3.0.3 has been released.
   October 25, 2001: GCC 3.0.2 has been released.
   August 20, 2001: GCC 3.0.1 has been released.
   June 18, 2001: GCC 3.0 has been released.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
   are also [12]other ways to contact the FSF.

   These pages are maintained by [13]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [14]GCC   manuals.   If   that   fails,   the
    [15]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [16]gcc@gnu.org   or
    [17]gcc@gcc.gnu.org. All of our lists have [18]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [19]Valid XHTML 1.0 

References

   1. http://www.gnu.org/
   2. http://gcc.gnu.org/gcc-3.0/features.html
   3. http://gcc.gnu.org/gcc-3.0/buildstat.html
   4. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   5. http://gcc.gnu.org/gcc-3.0/caveats.html
   6. http://gcc.gnu.org/index.html
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/mirrors.html
   9. http://www.gnu.org/order/ftp.html
  10. http://gcc.gnu.org/cvs.html
  11. mailto:gnu@gnu.org
  12. http://www.gnu.org/home.html#ContactInfo
  13. http://gcc.gnu.org/about.html
  14. http://gcc.gnu.org/onlinedocs/
  15. mailto:gcc-help@gcc.gnu.org
  16. mailto:gcc@gnu.org
  17. mailto:gcc@gcc.gnu.org
  18. http://gcc.gnu.org/lists.html
  19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/features.html

                            GCC 3.0 New Features

Additional changes in GCC 3.0.4

     * GCC  3.0  now  supports  newer versions of the [1]NetBSD operating
       system, which use the ELF object file format, on x86 processors.
     * Correct  debugging  information  is  generated from functions that
       have lines from multiple files (e.g. yacc output).
     * A  fix  for  whitespace handling in the -traditional preprocessor,
       which can affect Fortran.
     * Fixes to the exception handling runtime.
     * More fixes for bad code generation in C++.
     * A fix for shared library generation under AIX 4.3.
     * Documentation updates.
     * Port of GCC to Tensilica's Xtensa processor contributed.
     * A fix for compiling the PPC Linux kernel (FAT fs wouldn't link).

Additional changes in GCC 3.0.3

     * A fix to correct an accidental change to the PowerPC ABI.
     * Fixes for bad code generation on a variety of architectures.
     * Improvements  to  the  debugging  information  generated  for  C++
       classes.
     * Fixes for bad code generation in C++.
     * A fix to avoid crashes in the C++ demangler.
     * A fix to the C++ standard library to avoid buffer overflows.
     * Miscellaneous improvements for a variety of architectures.

Additional changes in GCC 3.0.2

     * Fixes for bad code generation during loop unrolling.
     * Fixes for bad code generation by the sibling call optimization.
     * Minor improvements to x86 code generation.
     * Implementation of function descriptors in C++ vtables for IA64.
     * Numerous minor bug-fixes.

Additional changes in GCC 3.0.1

     * C++ fixes for incorrect code-generation.
     * Improved cross-compiling support for the C++ standard library.
     * Fixes for some embedded targets that worked in GCC 2.95.3, but not
       in GCC 3.0.
     * Fixes for various exception-handling bugs.
     * A port to the S/390 architecture.

General Optimizer Improvements

     * [2]Basic block reordering pass.
     * New  if-conversion  pass with support for conditional (predicated)
       execution.
     * New tail call and sibling call elimination optimizations.
     * New register renaming pass.
     * New    (experimental)    [3]static    single    assignment   (SSA)
       representation support.
     * New   dead-code   elimination   pass  implemented  using  the  SSA
       representation.
     * [4]Global null pointer test elimination.
     * [5]Global code hoisting/unification.
     * More  builtins and optimizations for stdio.h, string.h and old BSD
       functions, as well as for ISO C99 functions.
     * New  builtin  __builtin_expect  for  giving  hints  to  the branch
       predictor.

New Languages and Language specific improvements

     * The GNU Compiler for the Java(TM) language (GCJ) is now integrated
       and  supported,  including  the  run-time  library containing most
       common non-GUI Java classes, a bytecode interpreter, and the Boehm
       conservative garbage collector. Many bugs have been fixed. GCJ can
       compile  Java  source  or  Java bytecodes to either native code or
       Java  class  files,  and supports native methods written in either
       the standard JNI or the more efficient and convenient CNI.
     * Here  is  a [6]partial list of C++ improvements, both new features
       and those no longer supported.
     * New   C++   ABI.   On   the  IA-64  platform  GCC  is  capable  of
       inter-operating with other IA-64 compilers.
     * The  new  ABI  also  significantly  reduces the size of symbol and
       debug information.
     * New  [7]C++  support  library  and  many  C++  bug  fixes,  vastly
       improving our conformance to the ISO C++ standard.
     * New [8]inliner for C++.
     * Rewritten C preprocessor, integrated into the C, C++ and Objective
       C compilers, with very many improvements including ISO C99 support
       and [9]improvements to dependency generation.
     * Support for more [10]ISO C99 features.
     * Many   improvements  to  support  for  checking  calls  to  format
       functions  such as printf and scanf, including support for ISO C99
       format features, extensions from the Single Unix Specification and
       GNU  libc  2.2, checking of strfmon formats and features to assist
       in auditing for format string security bugs.
     * New  warnings for C code that may have undefined semantics because
       of violations of sequence point rules in the C standard (such as a
       = a++;, a[n] = b[n++]; and a[i++] = i;), included in -Wall.
     * Additional warning option -Wfloat-equal.
     * Improvements to -Wtraditional.
     * Fortran improvements are listed in [11]the Fortran documentation.

New Targets and Target Specific Improvements

     * New x86 back-end, generating much improved code.
     * Support for a generic i386-elf target contributed.
     * New  option  to  emit  x86  assembly code using Intel style syntax
       (-mintel-syntax).
     * HPUX 11 support contributed.
     * Improved PowerPC code generation, including scheduled prologue and
       epilogue.
     * Port of GCC to Intel's IA-64 processor contributed.
     * Port of GCC to Motorola's MCore 210 and 340 contributed.
     * New unified back-end for Arm, Thumb and StrongArm contributed.
     * Port of GCC to Intel's XScale processor contributed.
     * Port of GCC to Atmel's AVR microcontrollers contributed.
     * Port of GCC to Mitsubishi's D30V processor contributed.
     * Port  of  GCC  to  Matsushita's  AM33  processor  (a member of the
       MN10300 processor family) contributed.
     * Port of GCC to Fujitsu's FR30 processor contributed.
     * Port   of   GCC   to   Motorola's  68HC11  and  68HC12  processors
       contributed.
     * Port of GCC to Sun's picoJava processor core contributed.

Documentation improvements

     * Substantially rewritten and improved C preprocessor manual.
     * Many improvements to other documentation.
     * Manpages  for  gcc,  cpp  and gcov are now generated automatically
       from  the  master  Texinfo  manual,  eliminating  the  problem  of
       manpages  being  out  of  date.  (The  generated manpages are only
       extracts  from the full manual, which is provided in Texinfo form,
       from  which  info, HTML, other formats and a printed manual can be
       generated.)
     * Generated   info  files  are  included  in  the  release  tarballs
       alongside   their  Texinfo  sources,  avoiding  problems  on  some
       platforms with building makeinfo as part of the GCC distribution.

Other significant improvements

     * Garbage collection used internally by the compiler for most memory
       allocation instead of obstacks.
     * Lengauer and Tarjan algorithm used for computing dominators in the
       CFG.  This  algorithm  can  be significantly faster and more space
       efficient than our older algorithm.
     * gccbug  script provided to assist in submitting bug reports to our
       bug tracking system. (Bug reports previously submitted directly to
       our  mailing lists, for which you received no bug tracking number,
       should  be  submitted  again using gccbug if you can reproduce the
       problem with GCC 3.0.)
     * The  internal  libgcc  library is [12]built as a shared library on
       systems that support it.
     * Extensive  testsuite  included  with  GCC, with many new tests. In
       addition  to  tests  for GCC bugs that have been fixed, many tests
       have  been  added  for  language  features,  compiler warnings and
       builtin functions.
     * Additional    language-independent   warning   options   -Wpacked,
       -Wpadded, -Wunreachable-code and -Wdisabled-optimization.
     * Target-independent  options  -falign-functions,  -falign-loops and
       -falign-jumps.

   Plus  a  great  many bugfixes and almost all the [13]features found in
   GCC 2.95.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [14]gnu@gnu.org. There
   are also [15]other ways to contact the FSF.

   These pages are maintained by [16]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [17]GCC   manuals.   If   that   fails,   the
    [18]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [19]gcc@gnu.org   or
    [20]gcc@gcc.gnu.org. All of our lists have [21]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [22]Valid XHTML 1.0 

References

   1. http://www.netbsd.org/
   2. http://gcc.gnu.org/news/reorder.html
   3. http://gcc.gnu.org/news/ssa.html
   4. http://gcc.gnu.org/news/null.html
   5. http://gcc.gnu.org/news/unify.html
   6. http://gcc.gnu.org/gcc-3.0/c++features.html
   7. http://gcc.gnu.org/libstdc++/
   8. http://gcc.gnu.org/news/inlining.html
   9. http://gcc.gnu.org/news/dependencies.html
  10. http://gcc.gnu.org/gcc-3.0/c99status.html
  11. http://gcc.gnu.org/onlinedocs/g77/News.html
  12. http://gcc.gnu.org/gcc-3.0/libgcc.html
  13. http://gcc.gnu.org/gcc-2.95/features.html
  14. mailto:gnu@gnu.org
  15. http://www.gnu.org/home.html#ContactInfo
  16. http://gcc.gnu.org/about.html
  17. http://gcc.gnu.org/onlinedocs/
  18. mailto:gcc-help@gcc.gnu.org
  19. mailto:gcc@gnu.org
  20. mailto:gcc@gcc.gnu.org
  21. http://gcc.gnu.org/lists.html
  22. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-3.0/caveats.html

                              GCC 3.0 Caveats

     * -fstrict-aliasing  is  now  part  of  -O2  and higher optimization
       levels.  This allows the compiler to assume the strictest aliasing
       rules  applicable  to  the language being compiled. For C and C++,
       this  activates  optimizations  based  on the type of expressions.
       This optimization may thus break old, non-compliant code.
     * Enumerations   are  now  properly  promoted  to  int  in  function
       parameters  and  function  returns.  Normally  this  change is not
       visible, but when using -fshort-enums this is an ABI change.
     * The undocumented extension that allowed C programs to have a label
       at  the end of a compound statement has been deprecated and may be
       removed  in a future version. Programs that now generate a warning
       about  this  may  be  fixed  by  adding a null statement (a single
       semicolon) after the label.
     * The  poorly  documented extension that allowed string constants in
       C,  C++  and  Objective  C  to contain unescaped newlines has been
       deprecated  and may be removed in a future version. Programs using
       this  extension may be fixed in several ways: the bare newline may
       be replaced by \n, or preceded by \n\, or string concatenation may
       be  used with the bare newline preceded by \n" and " placed at the
       start of the next line.
     * The Chill compiler is not included in GCC 3.0, because of the lack
       of a volunteer to convert it to use garbage collection.
     * Certain  non-standard  iostream  methods  from earlier versions of
       libstdc++  are not included in libstdc++ v3, i.e. filebuf::attach,
       ostream::form,  and  istream::gets. Here are workaround hints for:
       [1]ostream::form, [2]filebuf::attach.
     * The  new  C++  ABI  is  not  yet fully supported by current (as of
       2001-07-01)  releases  and  development  versions  of  GDB, or any
       earlier  versions.  There is a problem setting breakpoints by line
       number,  and  other related issues that have been fixed in GCC 3.0
       but not yet handled in GDB:
       [3]http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [4]gnu@gnu.org. There
   are also [5]other ways to contact the FSF.

   These pages are maintained by [6]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [7]GCC    manuals.   If   that   fails,   the
    [8]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing    list   at   [9]gcc@gnu.org   or
    [10]gcc@gcc.gnu.org. All of our lists have [11]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [12]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/onlinedocs/libstdc++/21_strings/howto.html
   2. http://gcc.gnu.org/onlinedocs/libstdc++/ext/howto.html
   3. http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg00421.html
   4. mailto:gnu@gnu.org
   5. http://www.gnu.org/home.html#ContactInfo
   6. http://gcc.gnu.org/about.html
   7. http://gcc.gnu.org/onlinedocs/
   8. mailto:gcc-help@gcc.gnu.org
   9. mailto:gcc@gnu.org
  10. mailto:gcc@gcc.gnu.org
  11. http://gcc.gnu.org/lists.html
  12. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/index.html

                                  GCC 2.95

   July 31, 1999: The GNU project and the GCC/EGCS developers are pleased
   to announce the release of GCC version 2.95. This is the first release
   of GCC since the April 1999 GCC/EGCS reunification and includes nearly
   a year's worth of new development and bugfixes.

   August 19, 1999: GCC version 2.95.1 has been released.

   October 27, 1999: GCC version 2.95.2 has been released.

   March 16, 2001: GCC version 2.95.3 has been released.

   GCC  used  to  stand  for  the  GNU C Compiler, but since the compiler
   supports  several  other languages aside from C, it now stands for the
   GNU Compiler Collection.

   The   whole  suite  has  been  extensively  [1]regression  tested  and
   [2]package  tested.  It should be reliable and suitable for widespread
   use.

   The compiler has several new optimizations, new targets, new languages
   and  other  new  features.  See  the  [3]new  features page for a more
   complete list of new features found in the GCC 2.95 releases.

   The  sources  include  installation  instructions  in  both  HTML  and
   plaintext forms in the install directory in the distribution. However,
   the  most  up  to  date [4]installation instructions and [5]build/test
   status  are  on  the  web  pages.  We  will  update those pages as new
   information becomes available.

   The  GCC  developers would like to thank the numerous people that have
   contributed  new  features,  test  results, bugfixes, etc to GCC. This
   [6]amazing group of volunteers is what makes GCC successful.

   And  finally,  we  can't  in  good  conscience  fail  to  mention some
   [7]caveats to using GCC 2.95.

   Download GCC 2.95 from the [8]GNU FTP server (ftp://ftp.gnu.org)
   [9]Find a GNU mirror site
   [10]Find a GCC mirror site

   For  additional  information  about GCC please see the [11]GCC project
   web server or contact the [12]GCC development mailing list.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [13]gnu@gnu.org. There
   are also [14]other ways to contact the FSF.

   These pages are maintained by [15]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [16]GCC   manuals.   If   that   fails,   the
    [17]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [18]gcc@gnu.org   or
    [19]gcc@gcc.gnu.org. All of our lists have [20]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [21]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/gcc-2.95/regress.html
   2. http://gcc.gnu.org/gcc-2.95/othertest.html
   3. http://gcc.gnu.org/gcc-2.95/features.html
   4. http://gcc.gnu.org/install/
   5. http://gcc.gnu.org/gcc-2.95/buildstat.html
   6. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   7. http://gcc.gnu.org/gcc-2.95/caveats.html
   8. ftp://ftp.gnu.org/pub/gnu/gcc/
   9. http://www.gnu.org/order/ftp.html
  10. http://gcc.gnu.org/mirrors.html
  11. http://gcc.gnu.org/index.html
  12. mailto:gcc@gcc.gnu.org
  13. mailto:gnu@gnu.org
  14. http://www.gnu.org/home.html#ContactInfo
  15. http://gcc.gnu.org/about.html
  16. http://gcc.gnu.org/onlinedocs/
  17. mailto:gcc-help@gcc.gnu.org
  18. mailto:gcc@gnu.org
  19. mailto:gcc@gcc.gnu.org
  20. http://gcc.gnu.org/lists.html
  21. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/features.html

                           GCC 2.95 New Features

     * General Optimizer Improvements:
          + [1]Localized  register  spilling  to  improve  speed and code
            density especially on small register class machines.
          + [2]Global CSE using lazy code motion algorithms.
          + [3]Improved global constant/copy propagation.
          + [4]Improved control flow graph analysis and manipulation.
          + [5]Local dead store elimination.
          + [6]Memory Load hoisting/store sinking in loops.
          + [7]Type based alias analysis is enabled by default. Note this
            feature will expose bugs in the Linux kernel. Please refer to
            the FAQ (as shipped with GCC 2.95) for additional information
            on this issue.
          + Major revamp of GIV detection, combination and simplification
            to improve loop performance.
          + Major improvements to register allocation and reloading.
     * New Languages and Language specific improvements
          + [8]Many C++ improvements.
          + [9]Many Fortran improvements.
          + [10]Java  front-end  has been integrated. [11]runtime library
            is available separately.
          + [12]ISO C99 support
          + [13]Chill front-end and runtime has been integrated.
          + Boehm garbage collector support in libobjc.
          + More  support  for  various  pragmas  which  appear in vendor
            include files
     * New Targets and Target Specific Improvements
          + [14]SPARC backend rewrite.
          + -mschedule=8000   will   optimize   code   for  PA8000  class
            processors;   -mpa-risc-2-0  will  generate  code  for  PA2.0
            processors
          + Various   micro-optimizations   for   the   ia32   port.   K6
            optimizations
          + Compiler  will  attempt  to align doubles in the stack on the
            ia32 port
          + Alpha EV6 support
          + PowerPC 750
          + RS6000/PowerPC:   -mcpu=401   was   added  as  an  alias  for
            -mcpu=403.   -mcpu=e603e  was  added  to  do  -mcpu=603e  and
            -msoft-float.
          + c3x, c4x
          + HyperSPARC
          + SparcLite86x
          + sh4
          + Support  for  new  systems  (OpenBSD, FreeBSD, UWIN, Interix,
            arm-linux)
          + vxWorks targets include support for vxWorks threads
          + StrongARM   110   and  ARM9  support  added.  ARM  Scheduling
            parameters rewritten.
          + Various  changes  to the MIPS port to avoid assembler macros,
            which in turn improves performance
          + Various performance improvements to the i960 port.
          + Major rewrite of ns32k port
     * Other significant improvements
          + [15]Ability to dump cfg information and display it using vcg.
          + The  new  faster  scheme  for  fixing  vendor header files is
            enabled by default.
          + Experimental internationalization support.
          + multibyte character support
          + Some compile-time speedups for pathological problems
          + Better support for complex types
     * Plus the usual mountain of bugfixes
     * Core  compiler is based on the gcc2 development tree from Sept 30,
       1998, so we have all of the [16]features found in GCC 2.8.

Additional Changes in GCC 2.95.1

     * Generic bugfixes and improvements
          + Various documentation fixes related to the GCC/EGCS merger.
          + Fix  memory  management  bug  which  could  lead  to spurious
            aborts, core dumps or random parsing errors in the compiler.
          + Fix  a  couple  bugs  in  the  dwarf1 and dwarf2 debug record
            support.
          + Fix infinite loop in the CSE optimizer.
          + Avoid undefined behavior in compiler FP emulation code
          + Fix  install  problem  when  prefix is overridden on the make
            install command.
          + Fix  problem  with  unwanted installation of assert.h on some
            systems.
          + Fix problem with finding the wrong assembler in a single tree
            build.
          + Avoid  increasing  the  known alignment of a register that is
            already known to be a pointer.
     * Platform specific bugfixes and improvements
          + Codegen bugfix for prologue/epilogue for cpu32 target.
          + Fix long long code generation bug for the Coldfire target.
          + Fix various aborts in the SH compiler.
          + Fix bugs in libgcc support library for the SH.
          + Fix alpha ev6 code generation bug.
          + Fix  problems with EXIT_SUCCESS/EXIT_FAILURE redefinitions on
            AIX platforms.
          + Fix -fpic code generation bug for rs6000/ppc svr4 targets.
          + Fix  varargs/stdarg  code  generation bug for rs6000/ppc svr4
            targets.
          + Fix weak symbol handling for rs6000/ppc svr4 targets.
          + Fix  various  problems  with  64bit  code  generation for the
            rs6000/ppc port.
          + Fix  codegen bug which caused tetex to be mis-compiled on the
            x86.
          + Fix compiler abort in new cfg code exposed by x86 port.
          + Fix  out  of  range  array  reference  in  code  convert flat
            registers to the x87 stacked FP register file.
          + Fix minor vxworks configuration bug.
          + Fix return type of bsearch for SunOS 4.x.
     * Language & Runtime specific fixes.
          + The  G++  signature extension has been deprecated. It will be
            removed  in  the next major release of G++. Use of signatures
            will result in a warning from the compiler.
          + Several bugs relating to templates and namespaces were fixed.
          + A bug that caused crashes when combining templates with -g on
            DWARF1 platforms was fixed.
          + Pointers-to-members,    virtual   functions,   and   multiple
            inheritance should now work together correctly.
          + Some  code-generation  bugs  relating  to function try blocks
            were fixed.
          + G++  is  a  little  bit  more  lenient  with  certain archaic
            constructs than in GCC 2.95.
          + Fix to prevent shared library version #s from bring truncated
            to 1 digit
          + Fix missing std:: in the libstdc++ library.
          + Fix stream locking problems in libio.
          + Fix problem in java compiler driver.

Additional Changes in GCC 2.95.2

   The  -fstrict-aliasing is not enabled by default for GCC 2.95.2. While
   the  optimizations  performed by -fstrict-aliasing are valid according
   to  the  C  and  C++  standards,  the  optimization  have  caused some
   problems, particularly with old non-conforming code.

   The  GCC  developers  are  experimenting with ways to warn users about
   code  which  violates  the C/C++ standards, but those warnings are not
   ready  for  widespread  use  at  this time. Rather than wait for those
   warnings  the  GCC developers have chosen to disable -fstrict-aliasing
   by default for the GCC 2.95.2 release.

   We  strongly  encourage developers to find and fix code which violates
   the  C/C++ standards as -fstrict-aliasing may be enabled by default in
   future  releases.  Use the option -fstrict-aliasing to re-enable these
   optimizations.
     * Generic bugfixes and improvements
          + Fix  incorrectly  optimized memory reference in global common
            subexpression elimination (GCSE) optimization pass.
          + Fix  code  generation  bug  in  regmove.c  in  which it could
            incorrectly change a "const" value.
          + Fix  bug  in  optimization of conditionals involving volatile
            memory references.
          + Avoid over-allocation of stack space for some procedures.
          + Fixed bug in the compiler which caused incorrect optimization
            of  an  obscure  series  of  bit  manipulations,  shifts  and
            arithmetic.
          + Fixed  register  allocator  bug  which  caused  teTeX  to  be
            mis-compiled on SPARC targets.
          + Avoid  incorrect  optimization  of degenerate case statements
            for certain targets such as the ARM.
          + Fix out of range memory reference in the jump optimizer.
          + Avoid dereferencing null pointer in fix-header.
          + Fix  test for GCC specific features so that it is possible to
            bootstrap with gcc-2.6.2 and older versions of GCC.
          + Fix  typo  in  scheduler which could potentially cause out of
            range memory accesses.
          + Avoid incorrect loop reversal which caused incorrect code for
            certain loops on PowerPC targets.
          + Avoid  incorrect optimization of switch statements on certain
            targets (for example the ARM).
     * Platform specific bugfixes and improvements
          + Work  around bug in Sun V5.0 compilers which caused bootstrap
            comparison failures on SPARC targets.
          + Fix SPARC backend bug which caused aborts in final.c.
          + Fix sparc-hal-solaris2* configuration fragments.
          + Fix bug in sparc block profiling.
          + Fix obscure code generation bug for the PARISC targets.
          + Define __STDC_EXT__ for HPUX configurations.
          + Various POWERPC64 code generation bugfixes.
          + Fix abort for PPC targets using ELF (ex GNU/Linux).
          + Fix collect2 problems for AIX targets.
          + Correct handling of .file directive for PPC targets.
          + Fix bug in fix_trunc x86 patterns.
          + Fix x86 port to correctly pop the FP stack for functions that
            return structures in memory.
          + Fix minor bug in strlen x86 pattern.
          + Use   stabs  debugging  instead  of  dwarf1  for  x86-solaris
            targets.
          + Fix  template repository code to handle leading underscore in
            mangled names.
          + Fix weak/weak alias support for OpenBSD.
          + GNU/Linux for the ARM has C++ compatible include files.
     * Language & Runtime specific fixes.
          + Fix  handling  of  constructor  attribute  in the C front-end
            which  caused  problems building the Chill runtime library on
            some targets.
          + Fix minor problem merging type qualifiers in the C front-end.
          + Fix aliasing bug for pointers and references (C/C++).
          + Fix    incorrect    "non-constant   initializer   bug"   when
            -traditional or -fwritable-strings is enabled.
          + Fix build error for Chill front-end on SunOS.
          + Do  not  complain  about  duplicate instantiations when using
            -frepo (C++).
          + Fix  array  bounds  handling  in  C++  front-end which caused
            problems   with   dwarf   debugging   information   in   some
            circumstances.
          + Fix minor namespace problem.
          + Fix problem linking java programs.

Additional Changes in GCC 2.95.3

     * Generic bugfixes and improvements
          + Fix  numerous  problems that caused incorrect optimization in
            the register reloading code.
          + Fix  numerous  problems that caused incorrect optimization in
            the loop optimizer.
          + Fix  aborts  in the functions build_insn_chain and scan_loops
            under some circumstances.
          + Fix an alias analysis bug.
          + Fix an infinite compilation bug in the combiner.
          + A few problems with complex number support have been fixed.
          + It  is  no longer possible for gcc to act as a fork bomb when
            installed incorrectly.
          + The -fpack-struct option should be recognized now.
          + Fixed a bug that caused incorrect code to be generated due to
            a lost stack adjustment.
     * Platform specific bugfixes and improvements
          + Support building ARM toolchains hosted on Windows.
          + Fix attribute calculations in ARM toolchains.
          + arm-linux support has been improved.
          + Fix a PIC failure on sparc targets.
          + On  ix86  targets,  the  regparm  attribute  should  now work
            reliably.
          + Several updates for the h8300 port.
          + Fix problem building libio with glibc 2.2.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [17]gnu@gnu.org. There
   are also [18]other ways to contact the FSF.

   These pages are maintained by [19]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [20]GCC   manuals.   If   that   fails,   the
    [21]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [22]gcc@gnu.org   or
    [23]gcc@gcc.gnu.org. All of our lists have [24]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [25]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/news/spill.html
   2. http://gcc.gnu.org/news/lcm.html
   3. http://gcc.gnu.org/news/cprop.html
   4. http://gcc.gnu.org/news/cfg.html
   5. http://gcc.gnu.org/news/dse.html
   6. http://gcc.gnu.org/news/hoist.html
   7. http://gcc.gnu.org/news/alias.html
   8. http://gcc.gnu.org/gcc-2.95/c++features.html
   9. http://gcc.gnu.org/onlinedocs/g77/News.html
  10. http://gcc.gnu.org/java/gcj-announce.txt
  11. http://gcc.gnu.org/news/javaannounce.html
  12. http://gcc.gnu.org/c99status.html
  13. http://gcc.gnu.org/news/chill.html
  14. http://gcc.gnu.org/news/sparc.html
  15. http://gcc.gnu.org/news/egcs-vcg.html
  16. http://gcc.gnu.org/egcs-1.0/features-2.8.html
  17. mailto:gnu@gnu.org
  18. http://www.gnu.org/home.html#ContactInfo
  19. http://gcc.gnu.org/about.html
  20. http://gcc.gnu.org/onlinedocs/
  21. mailto:gcc-help@gcc.gnu.org
  22. mailto:gcc@gnu.org
  23. mailto:gcc@gcc.gnu.org
  24. http://gcc.gnu.org/lists.html
  25. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/gcc-2.95/caveats.html

                              GCC 2.95 Caveats

     * GCC  2.95  will issue an error for invalid asm statements that had
       been  silently  accepted by earlier versions of the compiler. This
       is  particularly  noticeable  when compiling older versions of the
       Linux  kernel  (2.0.xx).  Please refer to the FAQ (as shipped with
       GCC 2.95) for more information on this issue.
     * GCC  2.95  implements  type  based  alias analysis to disambiguate
       memory  references.  Some  programs, particularly the Linux kernel
       violate  ANSI/ISO  aliasing  rules  and  therefore may not operate
       correctly when compiled with GCC 2.95. Please refer to the FAQ (as
       shipped with GCC 2.95) for more information on this issue.
     * GCC  2.95 has a known bug in its handling of complex variables for
       64bit  targets. Instead of silently generating incorrect code, GCC
       2.95  will  issue  a fatal error for situations it can not handle.
       This primarily affects the Fortran community as Fortran makes more
       use of complex variables than C or C++.
     * GCC  2.95  has  an  integrated  libstdc++,  but  does  not have an
       integrated  libg++.  Furthermore old libg++ releases will not work
       with  GCC  2.95. You can retrieve a recent copy of libg++ from the
       [1]GCC ftp server.
       Note most C++ programs only need libstdc++.
     * Exception   handling   may   not   work   with  shared  libraries,
       particularly  on  alphas,  hppas,  rs6000/powerpc  and  mips based
       platforms.  Exception  handling  is known to work on x86 GNU/Linux
       platforms with shared libraries.
     * In  general, GCC 2.95 is more rigorous about rejecting invalid C++
       code or deprecated C++ constructs than G++ 2.7, G++ 2.8, EGCS 1.0,
       or  EGCS  1.1.  As  a  result  it may be necessary to fix C++ code
       before it will compile with GCC 2.95.
     * G++  is  also  converting toward the ISO C++ standard; as a result
       code  which  was  previously  valid  (and  thus  accepted by other
       compilers  and  older  versions of g++) may no longer be accepted.
       The  flag  -fpermissive  may  allow  some  non-conforming  code to
       compile with GCC 2.95.
     * GCC  2.95  compiled  C++  code  is not binary compatible with EGCS
       1.1.x, EGCS 1.0.x or GCC 2.8.x.
     * GCC  2.95  does  not  have changes from the GCC 2.8 tree that were
       made between Sept 30, 1998 and April 30, 1999 (the official end of
       the  GCC  2.8  project).  Future GCC releases will include all the
       changes from the defunct GCC 2.8 sources.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [2]gnu@gnu.org. There
   are also [3]other ways to contact the FSF.

   These pages are maintained by [4]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [5]GCC    manuals.   If   that   fails,   the
    [6]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing    list   at   [7]gcc@gnu.org   or
    [8]gcc@gcc.gnu.org. All of our lists have [9]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [10]Valid XHTML 1.0 

References

   1. ftp://gcc.gnu.org/pub/gcc/infrastructure/libg++-2.8.1.3.tar.gz
   2. mailto:gnu@gnu.org
   3. http://www.gnu.org/home.html#ContactInfo
   4. http://gcc.gnu.org/about.html
   5. http://gcc.gnu.org/onlinedocs/
   6. mailto:gcc-help@gcc.gnu.org
   7. mailto:gcc@gnu.org
   8. mailto:gcc@gcc.gnu.org
   9. http://gcc.gnu.org/lists.html
  10. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/index.html

                                  EGCS 1.1

   September 3, 1998: We are pleased to announce the release of EGCS 1.1.
   December  1,  1998:  We  are  pleased  to announce the release of EGCS
   1.1.1.
   March 15, 1999: We are pleased to announce the release of EGCS 1.1.2.

   EGCS  is a free software project to further the development of the GNU
   compilers using an open development environment.

   EGCS  1.1  is  a major new release of the EGCS compiler system. It has
   been  [1]extensively  tested and is believed to be stable and suitable
   for widespread use.

   EGCS  1.1  is  based  on  an  June  6,  1998  snapshot  of the GCC 2.8
   development  sources; it contains all of the new features found in GCC
   2.8.1 as well as all new development from GCC up to June 6, 1998.

   EGCS 1.1 also contains many improvements and features not found in GCC
   or in older versions of EGCS:
     * Global  common  subexpression elimination and global constant/copy
       propagation (aka [2]gcse)
     * Ongoing improvements to the [3]alias analysis support to allow for
       better optimizations throughout the compiler.
     * Vastly   improved  [4]C++  compiler  and  integrated  C++  runtime
       libraries.
     * Fixes for the /tmp symlink race security problems.
     * New targets including mips16, arm-thumb and 64 bit PowerPC.
     * Improvements  to  GNU  Fortran  (g77) compiler and runtime library
       made since g77 version 0.5.23.

   See  the [5]new features page for a more complete list of new features
   found in EGCS 1.1 releases.

   EGCS  1.1.1  is a minor update to fix several serious problems in EGCS
   1.1:
     * General improvements and fixes
          + Avoid some stack overflows when compiling large functions.
          + Avoid incorrect loop invariant code motions.
          + Fix some core dumps on Linux kernel code.
          + Bring back the imake -Di386 and friends fix from EGCS 1.0.2.
          + Fix code generation problem in gcse.
          + Various documentation related fixes.
     * g++/libstdc++ improvements and fixes
          + MT safe EH fix for setjmp/longjmp based exception handling.
          + Fix a few bad interactions between optimization and exception
            handling.
          + Fixes for demangling of template names starting with "__".
          + Fix  a  bug  that would fail to run destructors in some cases
            with -O2.
          + Fix 'new' of classes with virtual bases.
          + Fix crash building Qt on the Alpha.
          + Fix failure compiling WIFEXITED macro on GNU/Linux.
          + Fix some -frepo failures.
     * g77 and libf2c improvements and fixes
          + Various documentation fixes.
          + Avoid compiler crash on RAND intrinsic.
          + Fix minor bugs in makefiles exposed by BSD make programs.
          + Define  _XOPEN_SOURCE  for  libI77  build  to avoid potential
            problems on some 64-bit systems.
          + Fix problem with implicit endfile on rewind.
          + Fix spurious recursive I/O errors.
     * platform specific improvements and fixes
          + Match all versions of UnixWare7.
          + Do not assume x86 SVR4 or UnixWare targets can handle stabs.
          + Fix PPC/RS6000 LEGITIMIZE_ADDRESS macro and bug in conversion
            from unsigned ints to double precision floats.
          + Fix ARM ABI issue with NetBSD.
          + Fix a few arm code generation bugs.
          + Fixincludes  will fix additional broken SCO OpenServer header
            files.
          + Fix  a m68k backend bug which caused invalid offsets in reg+d
            addresses.
          + Fix problems with 64bit AIX 4.3 support.
          + Fix  handling  of  long longs for varargs/stdarg functions on
            the ppc.
          + Minor fixes to CPP predefines for Windows.
          + Fix  code generation problems with gpr<->fpr copies for 64bit
            ppc.
          + Fix a few coldfire code generation bugs.
          + Fix some more header file problems on SunOS 4.x.
          + Fix assert.h handling for RTEMS.
          + Fix Windows handling of TREE_SYMBOL_REFERENCED.
          + Fix x86 compiler abort in reg-stack pass.
          + Fix cygwin/windows problem with section attributes.
          + Fix  Alpha  code  generation  problem  exposed  by  SMP Linux
            kernels.
          + Fix typo in m68k 32->64bit integer conversion.
          + Make  sure  target libraries build with -fPIC for PPC & Alpha
            targets.

   EGCS  1.1.2  is a minor update to fix several serious problems in EGCS
   1.1.1:
     * General improvements and fixes
          + Fix  bug  in  loop  optimizer  which  caused  the  SPARC (and
            potentially other) ports to segfault.
          + Fix infinite recursion in alias analysis and combiner code.
          + Fix bug in regclass preferencing.
          + Fix incorrect loop reversal which caused incorrect code to be
            generated for several targets.
          + Fix return value for builtin memcpy.
          + Reduce compile time for certain loops which exposed quadratic
            behavior in the loop optimizer.
          + Fix  bug  which caused volatile memory to be written multiple
            times when only one write was needed/desired.
          + Fix compiler abort in caller-save.c
          + Fix  combiner  bug which caused incorrect code generation for
            certain division by constant operations.
          + Fix  incorrect  code  generation  due to a bug in range check
            optimizations.
          + Fix   incorrect   code  generation  due  to  mis-handling  of
            clobbered values in CSE.
          + Fix   compiler   abort/segfault  due  to  incorrect  register
            splitting when unrolling loops.
          + Fix  code generation involving autoincremented addresses with
            ternary operators.
          + Work  around  bug  in  the  scheduler  which  caused qt to be
            mis-compiled on some platforms.
          + Fix code generation problems with -fshort-enums.
          + Tighten security for temporary files.
          + Improve  compile  time  for  codes  which  make  heavy use of
            overloaded functions.
          + Fix multiply defined constructor/destructor symbol problems.
          + Avoid   setting   bogus  RPATH  environment  variable  during
            bootstrap.
          + Avoid GNU-make dependencies in the texinfo subdir.
          + Install  CPP wrapper script in $(prefix)/bin if --enable-cpp.
            --enable-cpp=<dirname>  can  be used to specify an additional
            install directory for the cpp wrapper script.
          + Fix CSE bug which caused incorrect label-label refs to appear
            on some platforms.
          + Avoid  linking  in  EH  routines  from libgcc if they are not
            needed.
          + Avoid obscure bug in aliasing code.
          + Fix bug in weak symbol handling.
     * Platform-specific improvements and fixes
          + Fix detection of PPro/PII on Unixware 7.
          + Fix compiler segfault when building spec99 and other programs
            for SPARC targets.
          + Fix  code-generation  bugs  for  integer  and  floating point
            conditional move instructions on the PPro/PII.
          + Use fixincludes to fix byteorder problems on i?86-*-sysv.
          + Fix build failure for the arc port.
          + Fix floating point format configuration for i?86-gnu port.
          + Fix  problems  with  hppa1.0-hp-hpux10.20  configuration when
            threads are enabled.
          + Fix coldfire code generation bugs.
          + Fix "unrecognized insn" problems for Alpha and PPC ports.
          + Fix h8/300 code generation problem with floating point values
            in memory.
          + Fix unrecognized insn problems for the m68k port.
          + Fix namespace-pollution problem for the x86 port.
          + Fix problems with old assembler on x86 NeXT systems.
          + Fix PIC code-generation problems for the SPARC port.
          + Fix minor bug with LONG_CALLS in PowerPC SVR4 support.
          + Fix  minor  ISO  namespace  violation in Alpha varargs/stdarg
            support.
          + Fix incorrect "braf" instruction usage for the SH port.
          + Fix minor bug in va-sh which prevented its use with -ansi.
          + Fix problems recognizing and supporting FreeBSD.
          + Handle OpenBSD systems correctly.
          + Minor fixincludes fix for Digital UNIX 4.0B.
          + Fix problems with ctors/dtors in SCO shared libraries.
          + Abort  instead  of  generating  incorrect  code  for PPro/PII
            floating point conditional moves.
          + Avoid  multiply  defined  symbols  on Linux/GNU systems using
            libc-5.4.xx.
          + Fix abort in alpha compiler.
     * Fortran-specific fixes
          + Fix  the  IDate  intrinsic  (VXT) (in libg2c) so the returned
            year  is  in the documented, non-Y2K-compliant range of 0-99,
            instead of being returned as 100 in the year 2000.
          + Fix  the  `Date_and_Time' intrinsic (in libg2c) to return the
            milliseconds value properly in Values(8).
          + Fix  the  `LStat'  intrinsic  (in libg2c) to return device-ID
            information properly in SArray(7).

   Each  release  includes  installation  instructions  in  both HTML and
   plaintext  forms  (see the INSTALL directory in the toplevel directory
   of  the  distribution).  However,  we  also  keep  the most up to date
   [6]installation instructions and [7]build/test status on our web page.
   We will update those pages as new information becomes available.

   The  EGCS  project  would  like to thank the numerous people that have
   contributed new features, test results, bugfixes, etc. This [8]amazing
   group of volunteers is what makes EGCS successful.

   And  finally,  we  can't  in  good  conscience  fail  to  mention some
   [9]caveats to using EGCS 1.1.

   Download EGCS from egcs.cygnus.com (USA California).

   The EGCS 1.1 release is also available on many mirror sites.
   [10]Goto mirror list to find a closer site.
     _________________________________________________________________

   Please  send FSF & GNU inquiries & questions to [11]gnu@gnu.org. There
   are also [12]other ways to contact the FSF.

   These pages are maintained by [13]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [14]GCC   manuals.   If   that   fails,   the
    [15]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [16]gcc@gnu.org   or
    [17]gcc@gcc.gnu.org. All of our lists have [18]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [19]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.1/egcs-1.1-test.html
   2. http://gcc.gnu.org/news/gcse.html
   3. http://gcc.gnu.org/news/alias.html
   4. http://gcc.gnu.org/egcs-1.1/c++features.html
   5. http://gcc.gnu.org/egcs-1.1/features.html
   6. http://gcc.gnu.org/install/
   7. http://gcc.gnu.org/egcs-1.1/buildstat.html
   8. http://gcc.gnu.org/onlinedocs/gcc/Contributors.html
   9. http://gcc.gnu.org/egcs-1.1/caveats.html
  10. http://gcc.gnu.org/mirrors.html
  11. mailto:gnu@gnu.org
  12. http://www.gnu.org/home.html#ContactInfo
  13. http://gcc.gnu.org/about.html
  14. http://gcc.gnu.org/onlinedocs/
  15. mailto:gcc-help@gcc.gnu.org
  16. mailto:gcc@gnu.org
  17. mailto:gcc@gcc.gnu.org
  18. http://gcc.gnu.org/lists.html
  19. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/features.html

                           EGCS 1.1 new features

     * Integrated  GNU  Fortran  (g77)  compiler and runtime library with
       improvements, based on [1]g77 version 0.5.23.
     * Vast  improvements  in the C++ compiler; so many they have [2]page
       of their own!
     * Compiler implements [3]global common subexpression elimination and
       global copy/constant propagation.
     * More major improvements in the [4]alias analysis code.
     * More  major improvements in the exception handling code to improve
       performance,  lower static overhead and provide the infrastructure
       for future improvements.
     * The infamous /tmp symlink race security problems have been fixed.
     * The regmove optimization pass has been nearly completely rewritten
       to improve performance of generated code.
     * The  compiler  now  recomputes  register  usage information before
       local  register allocation. By providing more accurate information
       to   the   priority   based  allocator,  we  get  better  register
       allocation.
     * The  register reloading phase of the compiler optimizes spill code
       much better than in previous releases.
     * Some   bad   interactions   between  the  register  allocator  and
       instruction  scheduler  have  been fixed, resulting in much better
       code  for  certain  programs.  Additionally,  we  have  tuned  the
       scheduler in various ways to improve performance of generated code
       for some architectures.
     * The    compiler's   branch   shortening   algorithms   have   been
       significantly  improved to work better on targets which align jump
       targets.
     * The  compiler now supports -Os to prefer optimizing for code space
       over optimizing for code speed.
     * The  compiler  will  now  totally  eliminate  library  calls which
       compute  constant  values.  This  primarily  helps targets with no
       integer   div/mul  support  and  targets  without  floating  point
       support.
     * The compiler now supports an extensive "--help" option.
     * cpplib  has  been greatly improved and may be suitable for limited
       use.
     * Memory  footprint  for the compiler has been significantly reduced
       for some pathological cases.
     * The  time  to  build  EGCS  has  been improved for certain targets
       (particularly the alpha and mips platforms).
     * Many infrastructure improvements throughout the compiler, plus the
       usual mountain of bugfixes and minor improvements.
     * Target dependent improvements:
          + SPARC  port  now  includes  V8 plus and V9 support as well as
            performance  tuning  for Ultra class machines. The SPARC port
            now uses the Haifa scheduler.
          + Alpha  port  has  been tuned for the EV6 processor and has an
            optimized  expansion of memcpy/bzero. The Alpha port now uses
            the Haifa scheduler.
          + RS6000/PowerPC:  support for the Power64 architecture and AIX
            4.3. The RS6000/PowerPC port now uses the Haifa scheduler.
          + x86:  Alignment  of static store data and jump targets is per
            Intel  recommendations  now.  Various improvements throughout
            the  x86  port  to  improve performance on Pentium processors
            (including  improved epilogue sequences for Pentium chips and
            backend improvements which should help register allocation on
            all x86 variants. Conditional move support has been fixed and
            enabled  for  PPro  processors.  The  x86  port  also  better
            supports 64bit operations now. Unixware 7, a System V Release
            5  target,  is  now  supported and SCO OpenServer targets can
            support GAS.
          + MIPS  has  improved  multiply/multiply-add  support  and  now
            includes mips16 ISA support.
          + M68k has many micro-optimizations and Coldfire fixes.
     * Core  compiler  is  based on the GCC development tree from June 9,
       1998, so we have all of the [5]features found in GCC 2.8.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
   are also [7]other ways to contact the FSF.

   These pages are maintained by [8]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [9]GCC    manuals.   If   that   fails,   the
    [10]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [11]gcc@gnu.org   or
    [12]gcc@gcc.gnu.org. All of our lists have [13]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [14]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/onlinedocs/g77/News.html
   2. http://gcc.gnu.org/egcs-1.1/c++features.html
   3. http://gcc.gnu.org/news/gcse.html
   4. http://gcc.gnu.org/news/alias.html
   5. http://gcc.gnu.org/egcs-1.0/features-2.8.html
   6. mailto:gnu@gnu.org
   7. http://www.gnu.org/home.html#ContactInfo
   8. http://gcc.gnu.org/about.html
   9. http://gcc.gnu.org/onlinedocs/
  10. mailto:gcc-help@gcc.gnu.org
  11. mailto:gcc@gnu.org
  12. mailto:gcc@gcc.gnu.org
  13. http://gcc.gnu.org/lists.html
  14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.1/caveats.html

                              EGCS 1.1 Caveats

     * EGCS  has an integrated libstdc++, but does not have an integrated
       libg++.  Furthermore  old libg++ releases will not work with EGCS;
       HJ  Lu has made a libg++-2.8.1.2 snapshot available which may work
       with EGCS.
       Note most C++ programs only need libstdc++.
     * Exception   handling   may   not   work   with  shared  libraries,
       particularly  on  alphas,  hppas,  rs6000/powerpc  and  mips based
       platforms.  Exception  handling  is  known  to  work  on x86-linux
       platforms with shared libraries.
     * Some  versions  of  the  Linux kernel have bugs which prevent them
       from being compiled or from running when compiled by EGCS. See the
       FAQ (as shipped with EGCS 1.1) for additional information.
     * In general, EGCS is more rigorous about rejecting invalid C++ code
       or deprecated C++ constructs than g++-2.7, g++-2.8 or EGCS 1.0. As
       a  result  it  may  be  necessary  to  fix C++ code before it will
       compile with EGCS.
     * G++  is  also  converting toward the ISO C++ standard; as a result
       code  which  was  previously  valid  (and  thus  accepted by other
       compilers and older versions of g++) may no longer be accepted.
     * EGCS  1.1  compiled  C++  code  is not binary compatible with EGCS
       1.0.x or GCC 2.8.x due to changes necessary to support thread safe
       exception handling.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [1]gnu@gnu.org. There
   are also [2]other ways to contact the FSF.

   These pages are maintained by [3]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [4]GCC    manuals.   If   that   fails,   the
    [5]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing    list   at   [6]gcc@gnu.org   or
    [7]gcc@gcc.gnu.org. All of our lists have [8]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [9]Valid XHTML 1.0 

References

   1. mailto:gnu@gnu.org
   2. http://www.gnu.org/home.html#ContactInfo
   3. http://gcc.gnu.org/about.html
   4. http://gcc.gnu.org/onlinedocs/
   5. mailto:gcc-help@gcc.gnu.org
   6. mailto:gcc@gnu.org
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/lists.html
   9. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/index.html

                                  EGCS 1.0

   December 3, 1997: We are pleased to announce the release of EGCS 1.0.
   January 6, 1998: We are pleased to announce the release of EGCS 1.0.1.
   March 16, 1998: We are pleased to announce the release of EGCS 1.0.2.
   May 15, 1998 We are pleased to announce the release of EGCS 1.0.3.

   EGCS  is  a  collaborative  effort involving several groups of hackers
   using  an open development model to accelerate development and testing
   of GNU compilers and runtime libraries.

   An  important  goal  of  EGCS  is  to  allow  wide  scale  testing  of
   experimental features and optimizations; therefore, EGCS contains some
   features and optimizations which are still under development. However,
   EGCS  has been carefully tested and should be comparable in quality to
   most GCC releases.

   EGCS  1.0  is  based  on  an  August  2,  1997 snapshot of the GCC 2.8
   development  sources; it contains nearly all of the new features found
   in GCC 2.8.

   EGCS 1.0 also contains many improvements and features not found in GCC
   2.7 and even the GCC 2.8 series (which was released after the original
   EGCS 1.0 release).
     * Integrated C++ runtime libraries, including support for most major
       GNU/Linux systems!
     * The integrated libstdc++ library includes a verbatim copy of SGI's
       STL release.
     * Integrated GNU Fortran compiler.
     * New instruction scheduler.
     * New alias analysis code.

   See the [1]new features page for a more complete list of new features.

   EGCS  1.0.1  is  a  minor update to the EGCS 1.0 compiler to fix a few
   critical bugs and add support for Red Hat 5.0 Linux. Changes since the
   EGCS 1.0 release:
     * Add  support  for  Red  Hat 5.0 Linux and better support for Linux
       systems using glibc2.
       Many  programs  failed  to link when compiled with EGCS 1.0 on Red
       Hat  5.0  or  on systems with newer versions of glibc2. EGCS 1.0.1
       should fix these problems.
     * Compatibility  with  both  EGCS  1.0  and GCC 2.8 libgcc exception
       handling interfaces.
       To  avoid  future  compatibility problems, we strongly urge anyone
       who  is planning on distributing shared libraries that contain C++
       code to upgrade to EGCS 1.0.1 first.
       Soon  after  EGCS  1.0  was released, the GCC developers made some
       incompatible  changes  in  libgcc's exception handling interfaces.
       These  changes  were  needed  to solve problems on some platforms.
       This  means  that GCC 2.8.0, when released, will not be seamlessly
       compatible  with shared libraries built by EGCS 1.0. The reason is
       that  the libgcc.a in GCC 2.8.0 will not contain a function needed
       by the old interface.
       The  result  of  this  is that there may be compatibility problems
       with shared libraries built by EGCS 1.0 when used with GCC 2.8.0.
       With   EGCS  1.0.1,  generated  code  uses  the  new  (GCC  2.8.0)
       interface,  and libgcc.a has the support routines for both the old
       and  the  new  interfaces  (so EGCS 1.0.1 and EGCS 1.0 code can be
       freely  mixed,  and  EGCS  1.0.1  and GCC 2.8.0 code can be freely
       mixed).
       The maintainers of GCC 2.x have decided against including seamless
       support  for  the  old  interface  in  2.8.0,  since  it was never
       "official", so to avoid future compatibility problems we recommend
       against  distributing  any shared libraries built by EGCS 1.0 that
       contain C++ code (upgrade to 1.0.1 and use that).
     * Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends.
       The  x86  changes fix code generation errors exposed when building
       glibc2 and the Linux dynamic linker (ld.so).
       The  hppa  change  fixes  a compiler abort when configured for use
       with RTEMS.
       The  MIPS  changes fix problems with the definition of LONG_MAX on
       newer systems, allow for command line selection of the target ABI,
       and fix one code generation problem.
       The  rs6000/ppc change fixes some problems with passing structures
       to varargs/stdarg functions.
     * A  few machine independent bugfixes, mostly to fix code generation
       errors when building Linux kernels or glibc.
     * Fix a few critical exception handling and template bugs in the C++
       compiler.
     * Fix Fortran namelist bug on alphas.
     * Fix build problems on x86-solaris systems.

   EGCS 1.0.2 is a minor update to the EGCS 1.0.1 compiler to fix several
   serious problems in EGCS 1.0.1.
     * General improvements and fixes
          + Memory  consumption  significantly  reduced,  especially  for
            templates and inline functions.
          + Fix various problems with glibc2.1.
          + Fix loop optimization bug exposed by rs6000/ppc port.
          + Fix to avoid potential code generation problems in jump.c.
          + Fix some undefined symbol problems in dwarf1 debug support.
     * g++/libstdc++ improvements and fixes
          + libstdc++  in the EGCS release has been updated and should be
            link compatible with libstdc++-2.8.
          + Various  fixes  in  libio/libstdc++  to  work better on Linux
            systems.
          + Fix  problems  with  duplicate symbols on systems that do not
            support weak symbols.
          + Memory  corruption bug and undefined symbols in bastring have
            been fixed.
          + Various exception handling fixes.
          + Fix compiler abort for very long thunk names.
     * g77 improvements and fixes
          + Fix   compiler  crash  for  omitted  bound  in  Fortran  CASE
            statement.
          + Add missing entries to g77 lang-options.
          + Fix problem with -fpedantic in the g77 compiler.
          + Fix "backspace" problem with g77 on alphas.
          + Fix x86 backend problem with Fortran literals and -fpic.
          + Fix  some of the problems with negative subscripts for g77 on
            alphas.
          + Fixes for Fortran builds on cygwin32/mingw32.
     * platform specific improvements and fixes
          + Fix long double problems on x86 (exposed by glibc).
          + x86 ports define i386 again to keep imake happy.
          + Fix exception handling support on NetBSD ports.
          + Several changes to collect2 to fix many problems with AIX.
          + Define __ELF__ for rs6000/linux.
          + Fix -mcall-linux problem on rs6000/linux.
          + Fix stdarg/vararg problem for rs6000/linux.
          + Allow autoconf to select a proper install problem on AIX 3.1.
          + m68k  port  support  includes -mcpu32 option as well as cpu32
            multilibs.
          + Fix stdarg bug for irix6.
          + Allow EGCS to build on irix5 without the gnu assembler.
          + Fix problem with static linking on sco5.
          + Fix bootstrap on sco5 with native compiler.
          + Fix for abort building newlib on H8 target.
          + Fix fixincludes handling of math.h on SunOS.
          + Minor fix for Motorola 3300 m68k systems.

   EGCS  1.0.3  is a minor update to the EGCS 1.0.2 compiler to fix a few
   problems reported by Red Hat for builds of Red Hat 5.1.
     * Generic bugfixes:
          + Fix  a  typo in the libio library which resulted in incorrect
            behavior of istream::get.
          + Fix the Fortran negative array index problem.
          + Fix  a  major  problem  with  the ObjC runtime thread support
            exposed by glibc2.
          + Reduce memory consumption of the Haifa scheduler.
     * Target specific bugfixes:
          + Fix  one  x86  floating  point code generation bug exposed by
            glibc2 builds.
          + Fix one x86 internal compiler error exposed by glibc2 builds.
          + Fix profiling bugs on the Alpha.
          + Fix ImageMagick & emacs 20.2 build problems on the Alpha.
          + Fix  rs6000/ppc bug when converting values from integer types
            to floating point types.

   The  EGCS  1.0 releases include installation instructions in both HTML
   and  plaintext  forms  (see  the  INSTALL  directory  in  the toplevel
   directory  of  the distribution). However, we also keep the most up to
   date  [2]installation instructions and [3]build/test status on our web
   page. We will update those pages as new information becomes available.

   And,  we  can't  in good conscience fail to mention some [4]caveats to
   using EGCS.

   Update:  Big  thanks  to  Stanford for providing a high speed link for
   downloading EGCS (go.cygnus.com)!

   Download  EGCS  from  ftp.cygnus.com (USA California) or go.cygnus.com
   (USA California -- High speed link provided by Stanford).

   The EGCS 1.0 release is also available many mirror sites.
   [5]Goto mirror list to find a closer site

   We'd  like  to  thank  the  numerous  people that have contributed new
   features,  test results, bugfixes, etc. Unfortunately, they're far too
   numerous to mention by name.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [6]gnu@gnu.org. There
   are also [7]other ways to contact the FSF.

   These pages are maintained by [8]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [9]GCC    manuals.   If   that   fails,   the
    [10]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing   list   at   [11]gcc@gnu.org   or
    [12]gcc@gcc.gnu.org. All of our lists have [13]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [14]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.0/features.html
   2. http://gcc.gnu.org/install/
   3. http://gcc.gnu.org/egcs-1.0/buildstat.html
   4. http://gcc.gnu.org/egcs-1.0/caveats.html
   5. http://gcc.gnu.org/mirrors.html
   6. mailto:gnu@gnu.org
   7. http://www.gnu.org/home.html#ContactInfo
   8. http://gcc.gnu.org/about.html
   9. http://gcc.gnu.org/onlinedocs/
  10. mailto:gcc-help@gcc.gnu.org
  11. mailto:gcc@gnu.org
  12. mailto:gcc@gcc.gnu.org
  13. http://gcc.gnu.org/lists.html
  14. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/features.html

                             EGCS 1.0 features

     * Core  compiler  is  based on the gcc2 development tree from Aug 2,
       1997, so we have most of the [1]features found in GCC 2.8.
     * Integrated GNU Fortran compiler based on g77-0.5.22-19970929.
     * Vast  improvements  in the C++ compiler; so many they have [2]page
       of their own!
     * Integrated C++ runtime libraries, including support for most major
       linux systems!
     * New  instruction  scheduler  from IBM Haifa which includes support
       for  function  wide  instruction scheduling as well as superscalar
       scheduling.
     * Significantly improved alias analysis code.
     * Improved register allocation for two address machines.
     * Significant  code  generation  improvements  for  Fortran  code on
       Alphas.
     * Various  optimizations  from  the  g77 project as well as improved
       loop optimizations.
     * Dwarf2 debug format support for some targets.
     * egcs   libstdc++  includes  the  SGI  STL  implementation  without
       changes.
     * As  a  result  of  these  and  other changes, egcs libstc++ is not
       binary compatible with previous releases of libstdc++.
     * Various  new  ports  -- UltraSPARC, Irix6.2 & Irix6.3 support, The
       SCO  Openserver  5  family (5.0.{0,2,4} and Internet FastStart 1.0
       and  1.1),  Support for RTEMS on several embedded targets, Support
       for arm-linux, Mitsubishi M32R, Hitachi H8/S, Matsushita MN102 and
       MN103, NEC V850, Sparclet, Solaris & Linux on PowerPCs, etc.
     * Integrated testsuites for gcc, g++, g77, libstdc++ and libio.
     * RS6000/PowerPC   ports   generate   code  which  can  run  on  all
       RS6000/PowerPC variants by default.
     * -mcpu=  and  -march=  switches  for  the  x86 port to allow better
       control over how the x86 port generates code.
     * Includes  the template repository patch (aka repo patch); note the
       new template code makes repo obsolete for ELF systems using gnu-ld
       such as Linux.
     * Plus the usual assortment of bugfixes and improvements.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [3]gnu@gnu.org. There
   are also [4]other ways to contact the FSF.

   These pages are maintained by [5]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
    pages    and    the    [6]GCC    manuals.   If   that   fails,   the
    [7]gcc-help@gcc.gnu.org mailing list might help.
    Please  send  comments on these web pages and the development of GCC
    to    our    developer    mailing    list   at   [8]gcc@gnu.org   or
    [9]gcc@gcc.gnu.org. All of our lists have [10]public archives.

   Copyright  (C)  Free  Software Foundation, Inc., 51 Franklin St, Fifth
   Floor, Boston, MA 02110, USA.

   Verbatim  copying and distribution of this entire article is permitted
   in any medium, provided this notice is preserved.

   Last modified 2005-07-11 [11]Valid XHTML 1.0 

References

   1. http://gcc.gnu.org/egcs-1.0/features-2.8.html
   2. http://gcc.gnu.org/egcs-1.0/c++features.html
   3. mailto:gnu@gnu.org
   4. http://www.gnu.org/home.html#ContactInfo
   5. http://gcc.gnu.org/about.html
   6. http://gcc.gnu.org/onlinedocs/
   7. mailto:gcc-help@gcc.gnu.org
   8. mailto:gcc@gnu.org
   9. mailto:gcc@gcc.gnu.org
  10. http://gcc.gnu.org/lists.html
  11. http://validator.w3.org/check/referer
======================================================================
http://gcc.gnu.org/egcs-1.0/caveats.html

                              EGCS 1.0 Caveats

     * EGCS  has an integrated libstdc++, but does not have an integrated
       libg++. Furthermore old libg++ releases will not work with egc; HJ
       Lu has made a libg++-2.8.1.2 available which may work with EGCS.
       Note most C++ programs only need libstdc++.
     * Note  that using -pedantic or -Wreturn-type can cause an explosion
       in  the  amount of memory needed for template-heavy C++ code, such
       as   code   that   uses   STL.   Also  note  that  -Wall  includes
       -Wreturn-type,  so  if  you  use  -Wall  you  will need to specify
       -Wno-return-type to turn it off.
     * Exception   handling   may   not   work   with  shared  libraries,
       particularly on alphas, hppas, and mips based platforms. Exception
       handling  is  known  to  work  on  x86-linux platforms with shared
       libraries.
     * Some  versions  of  the  Linux kernel have bugs which prevent them
       from being compiled or from running when compiled by EGCS. See the
       FAQ (as shipped with EGCS 1.0) for additional information.
     * In general, EGCS is more rigorous about rejecting invalid C++ code
       or  deprecated  C++ constructs than G++ 2.7. As a result it may be
       necessary to fix C++ code before it will compile with EGCS.
     * G++  is  also  aggressively tracking the C++ standard; as a result
       code  which  was  previously  valid  (and  thus  accepted by other
       compilers and older versions of G++) may no longer be accepted.
     * EGCS  1.0 may not work with Red Hat Linux 5.0 on all targets. EGCS
       1.0.x and later releases should work with Red Hat Linux 5.0.
     _________________________________________________________________

   Please  send  FSF & GNU inquiries & questions to [1]gnu@gnu.org. There
   are also [2]other ways to contact the FSF.

   These pages are maintained by [3]the GCC team.


    For  questions  related  to the use of GCC, please consult these web
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    Please  send  comments on these web pages and the development of GCC
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References

   1. mailto:gnu@gnu.org
   2. http://www.gnu.org/home.html#ContactInfo
   3. http://gcc.gnu.org/about.html
   4. http://gcc.gnu.org/onlinedocs/
   5. mailto:gcc-help@gcc.gnu.org
   6. mailto:gcc@gnu.org
   7. mailto:gcc@gcc.gnu.org
   8. http://gcc.gnu.org/lists.html
   9. http://validator.w3.org/check/referer
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