/usr/local/gcc31/include/g++-v3/bits/stl_threads.h:52: bits/gthr.h: No such file or directory /usr/local/gcc31/include/g++-v3/bits/stl_threads.h:79: #error __GTHREAD_MUTEX_INIT or __GTHREAD_MUTEX_INIT_FUNCTION should be defined by gthr.h abstraction layer, report problem to libstdc++@gcc.gnu.org.