http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55909
--- Comment #43 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-01-30 09:41:52 UTC --- > TLS is supported in Fedora glibc obviously, the issue is likely with the sorry > state of the Fedora/SPARC port, which is essentially unmaintained. So it must > be something SPARC specific. This might be related to PR binutils/15056: http://sourceware.org/bugzilla/show_bug.cgi?id=15056 which reports that TLS is broken for the SPARC in the latest binutils release.