http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53083
--- Comment #2 from Da Fox <da_fox at mad dot scientist.com> 2012-04-23 12:26:53 UTC --- Created attachment 27220 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27220 .i version of miarc.c I think this is the information that was missing: The file in question compiled with CFLAGS="-O3 -pipe -fomit-frame-pointer -fweb -ffast-math -mtune=native -mfpmath=sse" (attached) gcc build options: >>> Compiling source in /var/tmp/portage/sys-devel/gcc-4.6.0/work/gcc-4.6.0 ... * CFLAGS="-march=native -pipe -mtune=native -O2" * CXXFLAGS="-march=native -pipe -mtune=native -O2" * Configuring gcc ... * configuring for GCC_LANG: c,c++,fortran * PREFIX: /usr * BINPATH: /usr/x86_64-pc-linux-gnu/gcc-bin/4.6.0 * LIBPATH: /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.0 * DATAPATH: /usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.0 * STDCXX_INCDIR: /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.0/include/g++-v4 * Configuring GCC with: * --prefix=/usr * --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.6.0 * --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.0/include * --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.0 * --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.0/man * --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.6.0/info * --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.0/include/g++-v4 * --host=x86_64-pc-linux-gnu * --build=x86_64-pc-linux-gnu * --disable-altivec * --disable-fixed-point * --with-ppl * --with-cloog * --disable-ppl-version-check * --with-cloog-include=/usr/include/cloog-ppl * --enable-lto * --enable-nls * --without-included-gettext * --with-system-zlib * --disable-werror * --enable-secureplt * --disable-multilib * --disable-libmudflap * --disable-libssp * --enable-libgomp * --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.6.0/python * --enable-checking=release * --disable-libgcj * --enable-languages=c,c++,fortran * --enable-shared * --enable-threads=posix * --enable-__cxa_atexit * --enable-clocale=gnu * --enable-targets=all * --with-bugurl=http://bugs.gentoo.org/ * --with-pkgversion=Gentoo 4.6.0 p1.2, pie-0.4.5 Compiler does not seem to output anything relevant (no errors, compilation is successful).