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From: Andris Pavenis <pavenis AT latnet DOT lv>
To: djgpp AT delorie DOT com
Subject: Re: cross compilation
Date: Tue, 18 Nov 2003 16:28:11 +0200
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Reply-To: djgpp AT delorie DOT com

On Monday 17 November 2003 12:41, Armstrong wrote:
> hello,
>
> ok, so i now got gcc32s.zip. and did not use
> the patch.
>
> things seems to be better, but still not
> good.
>
> now `make` for gcc-3.2-obj dir says:
>
> ../../../gcc-3.2/libiberty/getpwd.c: In function `getpwd':
> ../../../gcc-3.2/libiberty/getpwd.c:86: `PATH_MAX' undeclared (first use in
> this function)
> ../../../gcc-3.2/libiberty/getpwd.c:86: (Each undeclared identifier is
> reported only once
> ../../../gcc-3.2/libiberty/getpwd.c:86: for each function it appears in.)
> make[1]: *** [getpwd.o] Error 1
> make[1]: Leaving directory
> `/packages/cross/gnu/gcc-3.2-obj/i586-pc-msdosdjgpp/libiberty'
> make: *** [all-target-libiberty] Error 2
>
> any help on whats wrong.? i had done:
>   ../gcc-3.2/configure --prefix=$prefix --target=$target \
>   --with-headers=$prefix/$target/include >& configure.log
>
> thanks for the help. (:

Problem seems familiar, but I haven't encountered it in last builds

Last GCC version, which I build as Linux to DJGPP cross-compiler was 
gcc-3.3.2. 
1) At first gcc332s2.zip should be unpacked in some directory.
2) You must have old versions of autoconf-2.13 and automake-1.4 (or 1.5)
installed, perhaps with different prefix.
3) Put the directory where old autoconf and automake are located at the 
begin of path and run script unpack-gcc.sh
4) You should have cross-binutils installed (--prefix=/usr), DJGPP headers at
/usr/i586-pc-msdosdjgpp/sys-include (I have them at /usr/i586-pc-msdosdjgpp/
include and sys-include is a symlink to that directory), similary DJGPP 
libraries must be at /usr/i586-pc-msdosdjgpp/lib
5) Create directory /usr/lib/gcc-lib/i586-pc-msdosdjgpp/3.3.2 (not needed if
building as root)
6) When this all is Ok, then following should configure and build 
cross-compiler

#! /bin/sh
VER=3.3.2
DVER=`echo $VER | sed -e 's#\.#_#' | sed -e 's#\.##g' | sed -e 's#_#.#'`
TOP=`pwd`
SRC=$TOP/gnu/gcc-$DVER
test -d djcross || mkdir djcross || exit 1
cd djcross || exit 1
$SRC/configure	--prefix=/usr \
		--host=`sh $SRC/config.guess` \
		--target=i586-pc-msdosdjgpp \
		--disable-nls \
		--enable-version-specific-runtime-libs \
		--enable-languages=c,c++,f77,objc || exit 1
make

		
Only note: as I remeber c++ include directory must be renamed after 
installation

This is how I'm building cross-compiler. Of course all should be  modified
to install cross-compiler in user directory or in /usr/local.

Andris