Can not build gcc-4.0.2

[aq961_]

Hello!

   I  encounter some strange build time errors during libunwind compilation.
What should I do, how can I fix?
   I  need a compiler to work with AthlonXP and Sempron64 to switch to 64bit
in the future.

   Here is my configuration file:

================================my_configure.sh===============================
#!/bin/sh

B_SUF=GNU_Compiler_Collection

CC="gcc -O1"

CFLAGS="-mmmx -msse -m3dnow"
CFLAGS_FOR_BUILD=$CFLAGS
CFLAGS_FOR_HOST=$CFLAGS

LDFLAGS="-lpthread"
LDFLAGS_FOR_BUILD=$LDFLAGS
LDFLAGS_FOR_HOST=$LDFLAGS

/home/gcc-4.0.2/configure \
--enable-threads=posix --srcdir=/home/gcc-4.0.2/ \
--prefix=/usr --libdir=/usr/lib/$B_SUF \
--bindir=/usr/bin/$B_SUF/ \
--infodir=/usr/local/info --mandir=/usr/local/man \
--includedir=/usr/include --with-local-prefix=/usr/include/$B_SUF \
--disable-win32-registry --with-gxx-include-dir=/usr/include/c++ \
--enable-languages=c,c++,objc,java,treelang --with-dwarf2 \
--enable-nls --enable-shared i786-pc-linux-gnu
==============================================================================

Error messages during building:

=============================stdout.log=======================================
/home/gcc-build/gcc/xgcc -B/home/gcc-build/gcc/ -B/usr/i786-pc-linux-gnu/bin/ -B/usr/i786-pc-linux-gnu/lib/
-isystem /usr/i786-pc-linux-gnu/include -isystem /usr/i786-pc-linux-gnu/sys-include -O2  -DIN_GCC
 -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem
 ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I.
 -I/home/gcc-4.0.2/gcc -I/home/gcc-4.0.2/gcc/. -I/home/gcc-4.0.2/gcc/../include
 -I/home/gcc-4.0.2/gcc/../libcpp/include  -fvisibility=hidden -DHIDE_EXPORTS -fexceptions
 -c /home/gcc-4.0.2/gcc/unwind-dw2.c -o libgcc/./unwind-dw2.o
In file included from /home/gcc-4.0.2/gcc/unwind-dw2.c:257:
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h: In function 'x86_fallback_frame_state':
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:146: error: 'struct sigcontext' has no member named
 'esp'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:153: error: 'struct sigcontext' has no member named
 'eax'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:155: error: 'struct sigcontext' has no member named
 'ebx'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:157: error: 'struct sigcontext' has no member named
 'ecx'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:159: error: 'struct sigcontext' has no member named
 'edx'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:161: error: 'struct sigcontext' has no member named
 'esi'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:163: error: 'struct sigcontext' has no member named
 'edi'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:165: error: 'struct sigcontext' has no member named
 'ebp'
/home/gcc-4.0.2/gcc/config/i386/linux-unwind.h:167: error: 'struct sigcontext' has no member named
 'eip'
make[2]: *** [libgcc/./unwind-dw2.o] Error 1
make[2]: Leaving directory `/home/gcc-build/gcc'
make[1]: *** [libgcc.a] Error 2
make[1]: Leaving directory `/home/gcc-build/gcc'
make: *** [all-gcc] Error 2
==============================================================================

-- 
Best regards,
 Aq_                          mailto:aq961_@rambler.ru