Bootstrap failures with build/genextract

["Art Haas" <ahaas at airmail dot net>]

Hi.

I've been seeing bootstrap failures in my last few attempts to build 
mainline GCC. My last successful build was around November 26. I'm
running on i686-pc-linux-gnu using Debian unstable. My builds are
configured with the following short script:

$ cat gcc_conf.sh
#!/bin/sh

params="-march=pentium2"

CPPFLAGS="-DNDEBUG" CFLAGS="-O2 ${params}" CXXFLAGS="-O2 ${params} -fno-check-new" /mnt/src/gcc/configure --prefix=/opt/gnu --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-languages="c,c++,objc" --disable-checking --with-system-zlib --with-gc=page --disable-libstdcxx-pch

export _POSIX2_VERSION=199209
make bootstrap-lean BOOT_CFLAGS="-O2 ${params}" CXXFLAGS="-O2 ${params} -fno-check-new" > make_out 2>&1

# make -k check > check_out 2>&1
$

The output of my last successful build:

$ gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: /mnt/src/gcc/configure --prefix=/opt/gnu
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-languages=c,c++,objc --disable-checking --with-system-zlib
--with-gc=page --disable-libstdcxx-pch
Thread model: posix
gcc version 4.3.0 20061127 (experimental)

Here's the snippet of the build log where things fail:

[ ... snip ... ]
/usr/src/gcc_svn/objdir-1204/./prev-gcc/xgcc -B/usr/src/gcc_svn/objdir-1204/./prev-gcc/ -B/opt/gnu/i686-pc-linux-gnu/bin/   -O2 -march=pentium2 -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Wold-style-definition -Wmissing-format-attribute -Werror    -DHAVE_CONFIG_H -DGENERATOR_FILE  -o build/genextract \
	    build/genextract.o build/rtl.o build/read-rtl.o build/ggc-none.o build/vec.o build/min-insn-modes.o build/gensupport.o build/print-rtl.o build/errors.o .././libiberty/libiberty.a
build/genextract /mnt/src/gcc/gcc/config/i386/i386.md \
	  insn-conditions.md > tmp-extract.c
/bin/sh: line 1: 20227 Segmentation fault      build/genextract /mnt/src/gcc/gcc/config/i386/i386.md insn-conditions.md >tmp-extract.c
make[3]: *** [s-extract] Error 139
make[3]: Leaving directory `/usr/src/gcc_svn/objdir-1204/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/usr/src/gcc_svn/objdir-1204'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/usr/src/gcc_svn/objdir-1204'
make: *** [bootstrap-lean] Error 2

I also am seeing similar failures when building on a SMP PIII machine
running Redhat Rawhide, but on an Athlon machine running FC5 the builds
have been completing successfully. The Athlon box has 1G of physical
memory, where the rawhide machine has 256M with 1G swap and my Debian
box has 128M with 100M swap. My most recent build attempt was last
night on the Debian box, and the failure above comes from that build.

Anyone else seeing similar failures? Any ideas as to why things go boom?

Thanks.

Art Haas
-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822