http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53270
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-05-09 17:12:14 UTC --- (In reply to comment #12) > You might try configuring with "--disable-libstdcxx-threads". It > disables C++11 threads support. guard.cc is always built, it's part of libsupc++ so it's nothing to do with the C++11 thread library. I'm pretty sure we've already dealt with this failure elsewhere, IIRC the linuxthreads pthread_mutex_t type has a volatile member causing the default assignment operator to be deleted. For PR 51296 I added a way to force use of __GTHREAD_MUTEX_INIT_FUNCTION, by defining _GTHREAD_USE_MUTEX_INIT_FUNC in libstdc++-v3/config/os/.../os_defines.h We might want to put something in config/os/gnu-linux/os_defines.h so that the macro is defined when using linuxthreads
