Currently %configure includes the --target argument which is irrelevant for normal software and causes trouble when building compilers, since the build process assumes a cross-compilation is in effect. Currently on at least F11 i386 and F12 i386 the relevant flags used by %configure are --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=i586-redhat-linux-gnu
ref. https://www.redhat.com/archives/fedora-devel-list/2009-August/msg00498.html
*** This bug has been marked as a duplicate of bug 458648 ***