2014-10-14  Kai Tietz  <ktietz@redhat.com>

        PR libstdc++/57440
        * config/os/mingw32/os_defines.h (_GTHREAD_USE_MUTEX_INIT_FUNC):
        Define to avoid leak.
        * config/os/mingw32-w64/os_defines.h: Likewise.

From-SVN: r216210