http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56371
--- Comment #1 from Karlson2k <k2k at narod dot ru> 2013-02-17 23:12:26 UTC --- Too many differences to quickly predict what and where wrong, but most significant for me is 'thread-local storage'. Compiled GCC from combined tree don't have emulation for TLS and resulted GCC fail for build any program with 'static __thread'.