#ifdef _GNU_SOURCE
#define __siginfo siginfo
+#define __ucontext ucontext
#endif
#define __NEED_size_t
#define SIGSTKSZ 8192
#endif
-#ifdef _BSD_SOURCE
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+#define NSIG _NSIG
+#endif
+
+#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
typedef void (*sig_t)(int);
#endif