a gcc output when facing an unknown atom

gcc_unknown_atom.txt (text/plain), 1.93 KB, created by nobody on 2014-12-17 11:53:35 UTC

LC_ALL=C gcc -march=invalid_atom_for_that_gcc -v -E -P - < /dev/null 
Using built-in specs.
COLLECT_GCC=/usr/i686-pc-linux-gnu/gcc-bin/4.7.4/gcc
Target: i686-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-4.7.4/work/gcc-4.7.4/configure --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/4.7.4 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.7.4/include --datadir=/usr/share/gcc-data/i686-pc-linux-gnu/4.7.4 --mandir=/usr/share/gcc-data/i686-pc-linux-gnu/4.7.4/man --infodir=/usr/share/gcc-data/i686-pc-linux-gnu/4.7.4/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.7.4/include/g++-v4 --with-python-dir=/share/gcc-data/i686-pc-linux-gnu/4.7.4/python --enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --enable-checking=release --with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.7.4 p1.0, pie-0.5.5' --enable-libstdcxx-time --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --disable-multilib --disable-altivec --disable-fixed-point --with-arch=i686 --enable-targets=all --disable-libgcj --enable-libgomp --disable-libmudflap --disable-libssp --enable-lto --without-cloog --without-ppl
Thread model: posix
gcc version 4.7.4 (Gentoo 4.7.4 p1.0, pie-0.5.5) 
COLLECT_GCC_OPTIONS='-march=invalid_atom_for_that_gcc' '-v' '-E' '-P'
 /usr/libexec/gcc/i686-pc-linux-gnu/4.7.4/cc1 -E -quiet -v -P - -march=invalid_atom_for_that_gcc
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/lib/gcc/i686-pc-linux-gnu/4.7.4/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/i686-pc-linux-gnu/4.7.4/include
 /usr/lib/gcc/i686-pc-linux-gnu/4.7.4/include-fixed
 /usr/include
End of search list.
cc1: error: bad value (invalid_atom_for_that_gcc) for -march= switch