added a new check for pthread_mutex_timedlock() into configure.ac

qse/configure

@@ -19902,6 +19902,52 @@ fi
 done
 
 
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_mutex_timedlock in -lpthread" >&5
+$as_echo_n "checking for pthread_mutex_timedlock in -lpthread... " >&6; }
+if ${ac_cv_lib_pthread_pthread_mutex_timedlock+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpthread  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pthread_mutex_timedlock ();
+int
+main ()
+{
+return pthread_mutex_timedlock ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_pthread_pthread_mutex_timedlock=yes
+else
+  ac_cv_lib_pthread_pthread_mutex_timedlock=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread_pthread_mutex_timedlock" >&5
+$as_echo "$ac_cv_lib_pthread_pthread_mutex_timedlock" >&6; }
+if test "x$ac_cv_lib_pthread_pthread_mutex_timedlock" = xyes; then :
+
+
+$as_echo "#define HAVE_PTHREAD_MUTEX_TIMEDLOCK 1" >>confdefs.h
+
+
+fi
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lunicows" >&5
 $as_echo_n "checking for main in -lunicows... " >&6; }
 if ${ac_cv_lib_unicows_main+:} false; then :