I was trying to work around the problem described in PR 19120 by doing totaly unoptimized build:
[EMAIL PROTECTED]:::~/tmp/gcc-head/objdir> CFLAGS="-O0 -fno-omit-frame-pointer -g3" BOOT_CFLAGS="-O0 -fno-omit-frame-pointer -g3" LIBCFLAGS="-O0 -fno-omit-frame-pointer -g3" ../srcdir/configure --disable-nls --enable-version-specific-runtime-libs --enable-dwarf2 --with-cpu=pentium3 --with-arch=pentium3 --with-system-zlib --disable-shared --prefix=/home/4/wilx --enable-languages=c,c++ --disable-sjlj-exceptions --enable-shared=libstdc++ --enable-shared=libobjc --with-gc=zone make BOOT_CFLAGS="-O0 -fno-omit-frame-pointer -g3" CFLAGS="-O0 -fno-omit-frame-pointer -g3" LIBCFLAGS="-O0 -fno-omit-frame-pointer -g3" bootstrap Yet still I get -O2 during compilation: ./xgcc -B./ -B/home/4/wilx/i386-unknown-freebsd4.10/bin/ -isystem /home/4/wilx/i386-unknown-freebsd4.10/include -isystem /home/4/wilx/i386-unknown-freebsd4.10/sys-include -L/home/4/wilx/tmp/gcc-head/objdir/gcc/../ld -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -pthread -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../srcdir/gcc -I../../srcdir/gcc/. -I../../srcdir/gcc/../include -I../../srcdir/gcc/../libcpp/include -DL_fixunsxfdi -c ../../srcdir/gcc/libgcc2.c -o libgcc/./_fixunsxfdi.o -- Summary: Bootstrap ignores compiler flags supplied on command line Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: v dot haisman at sh dot cvut dot cz CC: gcc-bugs at gcc dot gnu dot org,v dot haisman at sh dot cvut dot cz GCC build triplet: i386-unknown-freebsd4.10 GCC host triplet: i386-unknown-freebsd4.10 GCC target triplet: i386-unknown-freebsd4.10 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19234