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* src/globals.cc: Define globals _GLIBCPP_mutex_init (), _GLIBCPP_mutex_address_init (), _GLIBCPP_once, _GLIBCPP_mutex and _GLIBCPP_mutex_address. * include/bits/stl_threads.h (_STL_mutex_lock): Use above to provide once-only runtime initialization of _M_lock mutex when __GTHREAD_MUTEX_INIT_FUNCTION is defined. (__STL_MUTEX_INITIALIZER): Provide initializer for _STL_mutex_lock for __GTHREAD_MUTEX_INIT_FUNCTION case. From-SVN: r43360
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