http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46455
--- Comment #29 from Zouzou <internet at 123gen dot com> 2010-11-17 07:38:39 UTC --- (In reply to comment #28) > Created attachment 22427 [details] > add destructors in <ext/concurrence.h> > almost the same as the last patch but the destructor calls: > _S_destroy<__gthread_recursive_mutex_t>(&_M_mutex, 0); different error this time: In file included from c:\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/memory:78:0, from test.cpp:15: c:\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/ext/concurrence.h: In static member function 'static int __gnu_cxx::__recursive_mutex::_S_destroy(_Rm*, typename __gnu_cxx::__recursive_mutex::_Detect_win32<_Rm, (& _Rm:: sema)>::type*) [with _Rm = __gthread_recursive_mutex_t, typename __gnu_cxx::__recursive_mutex::_Detect_win32<_Rm, (& _Rm:: sema)>::type = __gthread_mutex_t]': c:\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/ext/concurrence.h:224:54: instantiated from here c:\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/ext/concurrence.h:267:46: error: void value not ignored as it ought to be because __gthread_mutex_destroy returns void. after changing the return types of the _S_destroy functions to void and removing the "return" specifiers, the test case compiles and runs fine without any leak.