Problems crosscompiling 3.3.1 (CVS branch) from i386-linux to i686-pc-linux-gnu

[Liviu Dudau <dliviu at ntlworld dot com>]

Hello,

After all the nice things that started to appear in 3.3 branch of gcc, I 
launched on a project to build
a GNU/Linux system tailored to my CPU. As a first step, I'm trying to 
build a crosscompiler from my
i386-linux environment (Debian testing) to a i686-pc-linux-gnu target 
using the 3.3 CVS branch.

However, building the bootstrap c compiler fails misserably with:

make[2]: Entering directory `/opt/temp/obj/gcc-3.3.1/gcc'
for d in libgcc; do \
 if [ -d $d ]; then true; else /bin/sh 
../../../src/gcc-3.3.1/gcc/mkinstalldirs $d; fi; \
done
mkdir libgcc
if [ -f stmp-dirs ]; then true; else touch stmp-dirs; fi
/opt/temp/obj/gcc-3.3.1/gcc/xgcc -B/opt/temp/obj/gcc-3.3.1/gcc/ 
-B/opt/temp/build/cross/i686-pc-linux-gnu/bin/ 
-B/opt/temp/build/cross/i686-pc-linux-gnu/lib/ -isystem 
/opt/temp/build/cross/i686-pc-linux-gnu/include -O2  -DIN_GCC 
-DCROSS_COMPILE   -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -isystem ./include  -fPIC -g  -DIN_LIBGCC2 
-D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I. -I. 
-I../../../src/gcc-3.3.1/gcc -I../../../src/gcc-3.3.1/gcc/. 
-I../../../src/gcc-3.3.1/gcc/config 
-I../../../src/gcc-3.3.1/gcc/../include  -DL_muldi3 -c 
../../../src/gcc-3.3.1/gcc/libgcc2.c -o libgcc/./_muldi3.o
In file included from tconfig.h:23,
                from ../../../src/gcc-3.3.1/gcc/libgcc2.c:36:
../../../src/gcc-3.3.1/gcc/config/i386/linux.h:232:20: signal.h: No such 
file or directory
../../../src/gcc-3.3.1/gcc/config/i386/linux.h:233:26: sys/ucontext.h: 
No such file or directory
make[2]: *** [libgcc/./_muldi3.o] Error 1

as the first thing (I think) when it tries to build stage1. The 
configure command was:

CFLAGS="-O2 -Dinhibit_libc" ../../src/gcc-3.3.1/configure 
--prefix=/opt/temp/build/cross --host=i386-linux 
--target=i686-pc-linux-gnu --disable-nls --disable-shared 
--disable-multilib --enable-threads=single --enable-__cxa_atexit 
--enable-languages=c --with-gnu-as 
--with-as=/opt/temp/build/cross/bin/i686-pc-linux-gnu-as --with-gnu-ld 
--with-ld=/opt/temp/build/cross/bin/i686-pc-linux-gnu-ld 
--with-cpu=athlon_xp --with-schedule=athlon_xp --with-tune=athlon_xp 
--with-sysroot=/opt/temp/build/cross/i686-pc-linux-gnu/include/linux

Trying --with-sysroot=/opt/temp/build/cross/i686-pc-linux-gnu/include 
(where the linux, asm and asm-i386 directories reside) does not change 
the error. I can provide full logs on request.

The snipet right after it finished building xgcc1:

gcc -DIN_GCC -DHAVE_CONFIG_H -g -DIN_GCC -DCROSS_COMPILE -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wtraditional 
-pedantic -Wno-long-long -DHAVE_CONFIG_H -DGENERATOR_FILE  -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wtraditional 
-pedantic -Wno-long-long  -I. -I.. 
-I../../../../src/gcc-3.3.1/gcc/fixinc 
-I../../../../src/gcc-3.3.1/gcc/fixinc/.. 
-I../../../../src/gcc-3.3.1/gcc/fixinc/../config 
-I../../../../src/gcc-3.3.1/gcc/fixinc/../../include  -o fixincl 
fixincl.o fixtests.o fixfixes.o server.o procopen.o gnu-regex.o fixlib.o 
../../libiberty/libiberty.a
echo timestamp > full-stamp
./fixincl -v < /dev/null
'fixincl version 1.1'
chmod 755 ../fixinc.sh
make[3]: Leaving directory `/opt/livian/obj/gcc-3.3.1/gcc/fixinc'
rm -rf include; mkdir include
chmod a+rx include
(TARGET_MACHINE='i686-pc-linux-gnu'; srcdir=`cd 
../../../src/gcc-3.3.1/gcc; ${PWDCMD-pwd}`; \
SHELL='/bin/sh' ;\
export TARGET_MACHINE srcdir SHELL ; \
/bin/sh ./fixinc.sh `${PWDCMD-pwd}`/include 
/opt/livian/build/cross/i686-pc-linux-gnu/sys-include ; \
rm -f include/syslimits.h; \
if [ -f include/limits.h ]; then \
 mv include/limits.h include/syslimits.h; \
else \
 cp ../../../src/gcc-3.3.1/gcc/gsyslimits.h include/syslimits.h; \
fi; \
chmod a+r include/syslimits.h)
Fixing headers into /opt/livian/obj/gcc-3.3.1/gcc/include for 
i686-pc-linux-gnu target
if [ "/opt/livian/build/cross/i686-pc-linux-gnu/sys-include" = 
"/opt/livian/build/cross/i686-pc-linux-gnu/sys-include" ] \
  && [ -d /opt/livian/build/cross/i686-pc-linux-gnu/sys-include ]; then \
 if [ -d /opt/livian/build/cross/lib ] ; then true ; else mkdir 
/opt/livian/build/cross/lib ; fi; \
 if [ -d /opt/livian/build/cross/lib/gcc-lib ] ; then true ; else mkdir 
/opt/livian/build/cross/lib/gcc-lib; fi; \
 if [ -d /opt/livian/build/cross/lib/gcc-lib/i686-pc-linux-gnu ] ; then 
true ; else mkdir /opt/livian/build/cross/lib/gcc-lib/i686-pc-linux-gnu 
; fi; \
 if [ -d /opt/livian/build/cross/lib/gcc-lib/i686-pc-linux-gnu/3.3.1 ] 
; then true ; else mkdir 
/opt/livian/build/cross/lib/gcc-lib/i686-pc-linux-gnu/3.3.1 ; fi; \
else true; fi
echo timestamp > stmp-fixinc
if [ -f /opt/livian/build/cross/i686-pc-linux-gnu/sys-include/limits.h ] 
; then \
 cat ../../../src/gcc-3.3.1/gcc/limitx.h 
../../../src/gcc-3.3.1/gcc/glimits.h ../../../src/gcc-3.3.1/gcc/limity.h 
> tmp-xlimits.h; \
else \
 cat ../../../src/gcc-3.3.1/gcc/glimits.h > tmp-xlimits.h; \
fi
mv tmp-xlimits.h xlimits.h
if [ -d include ] ; then true; else mkdir include; chmod a+rx include; fi
for file in .. ../../../src/gcc-3.3.1/gcc/ginclude/float.h 
../../../src/gcc-3.3.1/gcc/ginclude/iso646.h 
../../../src/gcc-3.3.1/gcc/ginclude/stdarg.h 
../../../src/gcc-3.3.1/gcc/ginclude/stdbool.h 
../../../src/gcc-3.3.1/gcc/ginclude/stddef.h 
../../../src/gcc-3.3.1/gcc/ginclude/varargs.h 
../../../src/gcc-3.3.1/gcc/unwind.h 
../../../src/gcc-3.3.1/gcc/config/i386/mmintrin.h 
../../../src/gcc-3.3.1/gcc/config/i386/xmmintrin.h; do \
 if [ X$file != X.. ]; then \
   realfile=`echo $file | sed -e 's|.*/\([^/]*\)$|\1|'`; \
   echo timestamp > include/$realfile; \
   rm -f include/$realfile; \
   cp $file include; \
   chmod a+r include/$realfile; \
 fi; \
done
rm -f include/limits.h
cp xlimits.h include/limits.h
chmod a+r include/limits.h
rm -f include/README
cp ../../../src/gcc-3.3.1/gcc/README-fixinc include/README
chmod a+r include/README



Now the questions:

1) which version of signal.h is gcc trying to find here? Looking at my 
Debian system, there is a /usr/include/signal.h coming from glibc, and a 
/usr/include/linux/signal.h coming from the kernel. If it is the linux 
version, why not use the <linux/signal.h> in the i386/linux.h file?

2) what do I do wrong here? Am I missleaded? Any hints will be gladly 
appreciated.

3) why doesn't the configuration step for stage1 obey the 
--with-sysinclude option?

4) OT: even with all those options, the genattrtab always chooses the 
'pentium' and 'pentium_fpu' Automaton. Any idea on how to change that?

Sorry for the long post. Any answers will be welcome.


Many thanks,

Liviu