2 POSIX compatible signal blocking for threads.
10 sigprocmask [test $HAVE_PTHREAD_SIGMASK = 0]
13 gl_FUNC_PTHREAD_SIGMASK
14 if test $HAVE_PTHREAD_SIGMASK = 0; then
15 AC_LIBOBJ([pthread_sigmask])
17 gl_SIGNAL_MODULE_INDICATOR([pthread_sigmask])
31 Paul Eggert, Bruno Haible, Jim Meyering