http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48403
--- Comment #30 from H.J. Lu <hjl.tools at gmail dot com> 2011-04-04 18:52:13 UTC --- This --enable-clocale=gnu --with-system-zlib --enable-shared --with-demangler-in-ld --enable-cloog-backend=isl --with-ppl-include=/opt/gnu/include --with-ppl-lib=/opt/gnu/lib64 --with-cloog-include=/opt/gnu/include --with-cloog-lib=/opt/gnu/lib64 --with-fpmath=sse --enable-languages=c,c++,fortran,java,lto,objc works for me on Fedora 14/x86-64. Please provide your complete configure.