+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+ for the signal SIGABRT. Only one signal handler is stored for both
+ SIGABRT and SIGABRT_COMPAT. SIGABRT_COMPAT is not a signal of its own. */
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+#ifdef SIGABRT_COMPAT
+# define SIGABRT_COMPAT_MASK (1U << SIGABRT_COMPAT)
+#else
+# define SIGABRT_COMPAT_MASK 0
+#endif
+
+typedef void (*handler_t) (int);
+
+/* Handling of gnulib defined signals. */
+
+#if GNULIB_defined_SIGPIPE
+static handler_t SIGPIPE_handler = SIG_DFL;
+#endif
+
+#if GNULIB_defined_SIGPIPE
+static handler_t
+ext_signal (int sig, handler_t handler)
+{
+ switch (sig)
+ {
+ case SIGPIPE:
+ {
+ handler_t old_handler = SIGPIPE_handler;
+ SIGPIPE_handler = handler;
+ return old_handler;
+ }
+ default: /* System defined signal */
+ return signal (sig, handler);
+ }
+}
+# define signal ext_signal
+#endif
+