pthread_sigmask    42 gc/aix_irix_threads.c #undef pthread_sigmask
pthread_sigmask    76 gc/include/gc_pthread_redirects.h # define pthread_sigmask GC_pthread_sigmask
pthread_sigmask   148 gc/pthread_support.c #     undef pthread_sigmask
pthread_sigmask    12 gc/win32_threads.c # undef pthread_sigmask