http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61101
--- Comment #13 from Maxime Boissonneault <maxime.boissonneault at calculquebec dot ca> --- I see that. Wasn't the GCC 4.8.1 compiler supposed to already know to look in the folder /software6/compilers/gcc/4.8.1/include/c++/4.8.1/x86_64-unknown-linux-gnu/ to find bits/c++config.h ? Do I need to manually add that to the CPATH ?