Hi. I would like to tell that profiledboostrap does compile on 32 bit intel for current 4.6 tree snapshot and therefore 4.6 branch is not affected by this problem - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43085
evironment: AFLAGS="-O2 -march=pentium4 -msse2" export CXXFLAGS_FOR_BUILD=${AFLAGS} export CFLAGS_FOR_BUILD=${AFLAGS} export BOOT_CFLAGS=${AFLAGS} export LIBCFLAGS=${AFLAGS} export LIBCXXFLAGS=${AFLAGS} export CXXFLAGS_FOR_TARGET=${AFLAGS} export CFLAGS_FOR_TARGET=${AFLAGS} export CFLAGS=${AFLAGS} export CXXFLAGS=${CFLAGS} export JCFLAGS="-O2" export FCFLAGS="-O2" configure arguments: --host=i686-pc-linux --build=i686-pc-linux --disable-nls --with-cpu=core2 --with-arch=pentium4 --enable-languages=c,c++,fortran,go --disable-stage1-checking --enable-checking=release --enable-threads --enable-tls --enable-lto --with-fpmath=sse ~ cheers.