This is the port of gcc-3.1 for DJGPP.


Please read this file up to end (maybe skipping sections You don't need,
for example You don't need to read how to build gcc-3.1 from sources
if You only intend to use binary archives). Also consult DJGPP documentation
and FAQ where needed.


Requirements to use this binary release:
    DJGPP-2.03 or above (If You are still using earlier version 
            then please upgrade immediatelly).	
    binutils-2.11.2 or above. Command line option -mno-bnu210 to provide 
	    compatibility with binutils-2.8.1 or 2.9.1 is no more
	    supported

Requirements to build gcc-3.1 from sources:
    Long filename support. I built it in DOS session under Win98SE.
        Win95 and (I hope) WinME should be Ok. I myself haven't tested
	whether it can be build under Win2k or WinXP.
    at least 128Mb of RAM for building under Win9X (Amount of available
        DPMI memory for DOS session should be set to auto). 
    at least DJGPP-2.03 required (You should have latest update and
        additionally fix definition of va_list in include/sys/djtypes.h.
	It will be fixed in DJGPP-2.04 when it will be released.
	See patch at end of this file)
    other GNU utilities (see below)


Source archives
===============

Archive gcc31s2.zip contains script which modifies original gcc-3.1
and sources for DJGPP. You don't need it unless You want to recreate
GCC source archive for DJGPP. If You are using this archive and original 
sources of gcc-3.1.tar.gz, then You don't need gcc304s.zip.
    
The source archive gcc31s.zip contains all the sources to build
all compilers (C, C++, Objective C, GNU Fortran) and also C++
and Fortran libraries (libstdcxx.a, libgpp.a and libg2c.a). 
libg++ is no more supported.

Most users don't need source archives at all.

Binary archives
================

Binary archives are split into 5 parts:

  gcc31b.zip   : The gcc.exe driver program and the C compiler.
                 It also contains the documentation.

  gpp31b.zip   : The C++ compiler and libstdcxx.a together 
                 with needed header files 

  objc31b.zip  : The Objective C compiler and libobjc.a and the needed
                 header files.

  g7731b.zip   : GNU Fortran compiler and libg2c.a and g2f.h. 


The archive gcc31b.zip is required by all other binary packages

Binary packages includes following documentation files:
  
  Archive gcc31b.zip:  
	info/gcc.i* - the use and the internals of the GNU compiler
	info/cpp.i* - documentation of the GNU C preprocessor.
	info/cppinternals.i*  - internals of the GNU C Preprocessor.
		(NEW: use install-info to add it to info/dir)
  Archive gpp31b.zip:
        gnu/gcc-3.1/libstdcxx/* - some documentation of libstdc++-v3
		(HTML and text formats)
  Archive g7731b.zip:
	info/g77.i* - documentation of the GNU Fortran compiler


Before you install gcc-3.1 binaries
======================================

You should remove previous installation of gcc or egcs completely
(unless You really know what You are doing).

Make sure You don't have following files from earlier versions
(relative paths againt to DJGPP directory are given):
	bin/cc1.exe		(from gcc272b.zip or gcc2721b.zip)
	bin/cc1plus.exe		(from gpp272b.zip or gpp2721b.zip)
	bin/f771.exe		(from g7705XXb.zip, XX are 2 digits)
	lib/libgcc.a		(from gcc272b.zip or gcc2721b.zip)
	lib/libobjc.a		
	lib/specs		(from djdev201.zip or djdev202.zip) 
	lib/libstdcxx.a		
	lib/libgpp.a		

Following packages are required for binaries:
	binutils-2.11.2 or above (Versions before 2.11 will not work)

	DJGPP-2.03 (djdev203.zip) or above. 


Installing binaries of gcc-3.1
=================================

Needed archives for different programing languages
	C 			: gcc31b.zip

	C++			: gcc31b.zip, gpp31b.zip

	Fortran	                : gcc31b.zip, g7731b.zip

	Objective C		: gcc31b.zip, objc31b.zip

Of course for ALL languages You also need at least binutils (bnu2112b.zip
or newer) and djdev203.zip (or newer when it will be released)

Unzip all the zip files from that directory, preserving the
directory structure.  For example:

	pkunzip -d djdev203
or
	unzip386 djdev203


NOTES:  I suggest to avoid using command line option -fomit-frame-pointer
        with gcc-3.1 as this option is rather broken.        	
	

1. Only long filenames
----------------------

Unzip the binaries with an unzip program, which can restore the long filenames
stored in the zip archive.

2. Only short filenames
-----------------------

Unzip the binaries with an unzip program which doesn't know about long
filenames, or if your unzipper knows about them, please follow first
the steps described in the DJGPP FAQ in the section 
about setting the NameNumericTail to 0 __BEFORE__!!! unzipping the archives.

3. Long and short filenames at the same time
--------------------------------------------

Use an unzip program which can restore the long filenames and follow
the instructions under 2. when the unzipper knows about long filenames.


Note for users of C++ IO classes fstream, ifstream, ofstream
============================================================

There is a regression against earlier versions of GCC (gcc-2.95.3 and
earlier): Member functions tellp(), tellg(), seekp() and seekg()
are broken when stream is opened not in binary mode. If You are going
to use any similar functions You should open stream in binary mode.

Don't ask me when it will be fixed as I don't know that. I'm also 
not sure I'll spend much time trying to fix that.


Note for users of GNU Fortran compiler
======================================

If You are getting assembler warnings like:

foo.s: Assembler messages:
foo.s:1011: Warning: rest of line ignored; first ignored character is `+'
foo.s:1012: Warning: rest of line ignored; first ignored character is `+'

when compiling FORTRAN sources, please use stabs or DWARF-2 debugging info
instead of COFF one, for example:
	
	gcc -c -O2 -gstabs foo.f -o foo.o
	gcc -c -O2 -gdwarf-2 foo.f -o foo.o
	gcc -c -O2 -gstabs+ foo.f -o foo.o


Rebuilding gcc-3.1 from the sources
======================================

Requirememts
------------

-  Long filename support is required. It means You should build gcc-3.1
   under Win95 or Win98. I myself have not tested building under Win2k 
   and WinXP

-  Much of free disk space (500Mb or more, especially if
   You are using FAT16). 

-  128Mb RAM (or more) to build gcc-3.1 under Win9X. DPMI memory amount 
   for DOS session should be set to "Auto" as genattrtab requires more 
   than 64Mb to run.	

-  Many GNU packges. Please check whether You really have them:
	bsh204b.zip 	GNU BASH 2.0.4 or above. 
	dif272b.zip
	fil316b.zip or newer
	find41b.zip
	grep24b.zip
	gwk306b.zip or newer
	mak3791b.zip
	sed304b.zip or newer
	shl112b.zip
	txt122b.zip or newer
	txi42b.zip or above (You will not get info files with older versions)
	tar112b.zip
	bnu2112b.zip     binutils-2.11.2 or above
	working GNU C compiler (perhaps not earlier than gcc-2.8). 

   If You modify some source files You may also need
	acnf213b.zip (using autoconf-2.50 is not tested and is not
                      recommended)
	amak14b.zip or amak15b.zip
	
   You need autoconf and automake also if You are using gcc31s2.zip.
   However it's normally not needed for most users who builds gcc-3.1 from
   contents of gcc31s.zip.

   Usually newer versions of these packages should also work unless
   otherwise stated above

-  INFO-ZIP binary (compiled with DJGPP v2!!!) is needed for using build.sh 
   to create binary distrubution archives. There is no problems to compile 
   it. See http://www.info-zip.org for additional informtion
   about INFO-ZIP. You can find DJGPP compiled binary there. 

-  Working DJGPP installation of course:
	DJGPP-2.03 and above (I applied Win2k related patches for
		DJGPP v2.03 from http://clio.rice.edu/djgpp/win2k/main.htm);
   	binutils-2.11.2 or above, 
	working gcc installation (perhaps gcc-2.95 or above)

-  You should have sh.exe in DJGPP bin directory as symbolic link to  
   bash.exe (type 'ln -s bash.exe sh.exe' in that directory)


Extracting the sources
----------------------

At first you should unzip the archive gcc31s.zip. The sources are _NOT_
the complete sources like the original gcc-3.1 distribution. I have
removed many files to save disk space which are not needed for the DJGPP
port. However I left configuration of other machines in to make archives
usable to build cross-to-DJGPP compilers


Compiling gcc
-------------

Directory gnu/gcc-3.1 contains all sources of gcc-3.1

Sources are NOT configured. 
	
Change to directory gnu/gcc-3.1/build.djg and configure sources
by running script djconfig.sh. 

	sh djconfig.sh

When this is done You can build gcc-3.1 by running script djmake.sh
Under Win9X You'll have to restart it some times when it will crash 
due to Win9X DPMI descriptor leaks. You may use redir to get output in file.

	sh djmake.sh bootstrap

When this sucessfully ends run script djinsttmp.sh which installs
all into directory gnu/gcc-3.1/install.djg

After that change to this directory and run script makepkg.sh
to create binary distribution packages
	

Installing newly compiled gcc
-----------------------------

It's recommended to install binary packages which are generated 
bu makepkg.sh



Available resources
===================

See following URL for additional information:
gcc:		  http://gcc.gnu.org



Reporting bugs
==============

If you found a bug in gcc-3.1 (gcc, g77, libstdc++, etc) please report it to 
the GCC bug adresses and _NOT_ (or at least not only) in the DJGPP news group. 

But if you think you found a bug in the DJGPP related things, then please 
report it in comp.os.msdos.djgpp (the news group) or mail it to 
djgpp@delorie.com, which is the gateway to the news group.

Some possible situations:
  - gcc says 'Internal compiler error' (or something similar)
       more likely it is error of gcc if it is reproducible. It would 
       be nice to test on some other system (e.g. Linux) and also with 
       different version of compiler if possible and submit report to 
       gcc bug address. 
  - gcc crashes or freezes. 
       In this situation it's hard to guess where is the problem. It may be
       problem with gcc itself but it may be also DJGPP specific one.

Please email me directly only in rare cases, if you think it is only of
interest to me, since I'll see the reports in DJGPP mailing list.


Thanks to
=========

To all who have contributed new features, test results, bugfixes to GCC
(see http://gcc.gnu.org/thanks.html) and also who helped with DJGPP port of 
gcc-3.1


Have fun with gcc

Andris Pavenis <pavenis@lanet.lv>



--- include/sys/djtypes.h~1	Tue Dec 14 06:56:16 1999
+++ include/sys/djtypes.h	Mon Feb  4 16:20:40 2002
@@ -12,7 +12,12 @@
 #define __DJ_ssize_t	typedef int ssize_t;
 #define __DJ_time_t	typedef unsigned int time_t;
 #define __DJ_uid_t	typedef int uid_t;
+
+#if __GNUC__>=3
+#define __DJ_va_list    typedef __builtin_va_list va_list;
+#else
 #define __DJ_va_list	typedef void *va_list;
+#endif
 
 #if defined(__cplusplus) && ( (__GNUC_MINOR__ >= 8 && __GNUC__ == 2 ) || __GNUC__ >= 3 )
 /* wchar_t is now a keyword in C++ */
