http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48944
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-05-11 09:25:37 UTC --- Created attachment 24222 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24222 pr48944.diff I get the following output from configure *** This configuration is not supported in the following subdirectories: target-libmudflap target-libgomp target-libssp target-libiberty target-libobjc (Any other directories should still work fine.) And the respective line in the toplevel Makefile reads: TARGET_CONFIGDIRS = libgcc libquadmath boehm-gc libffi zlib With the attached patch applied the result is as expected and stuff looks like indicated by Joseph.