http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53728
--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2013-01-30 23:09:05 UTC --- Can you try to build from latest 4.6 branch SVN? The bootstrap works for me with: CC="gcc -m32" ~/gcc-svn/branches/gcc-4_6-branch/configure --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --with-arch=i686 --enable-languages=c and make -j 8 BOOT_CFLAGS="-O2 -march=pentium3 -pipe" bootstrap-lean for gcc version 4.6.4 20130127 (prerelease) [gcc-4_6-branch revision 195496] (GCC)