+##########################################
+# pthread_sigmask() probe
+if test "$pthread_sigmask" != "yes" ; then
+ pthread_sigmask="no"
+fi
+cat > $TMPC <<EOF
+#include <stddef.h> /* NULL */
+#include <signal.h> /* pthread_sigmask() */
+int main(void)
+{
+ return pthread_sigmask(0, NULL, NULL);
+}
+EOF
+if compile_prog "" "$LIBS" "pthread_sigmask" ; then
+ pthread_sigmask=yes
+elif compile_prog "" "$LIBS -lpthread" "pthread_sigmask" ; then
+ pthread_sigmask=yes
+ LIBS="$LIBS -lpthread"
+fi
+print_config "pthread_sigmask()" "$pthread_sigmask"
+