http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51627
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-19 21:03:02 UTC --- (In reply to comment #0) > checking for suffix of object files... configure: error: in > `/home/user/cross-avr-gcc/BUILD/cross-mipsel-gcc-4.6.2/gcc-mipsel/mipsel/libgcc': > configure: error: cannot compute suffix of object files: cannot compile > See `config.log' for more details. Have you done this? Have you read http://gcc.gnu.org/wiki/FAQ#configure_suffix ? Why not put the gmp, mpfr and mpc sources in the gcc source tree and let it build them?