From b457435a8845782708575236f2a7e67537330e6f Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 20 Dec 2014 00:18:06 +0000
Subject: use __buildin_unreachable() after MHD_PANIC() -- if supported by gcc

---
 src/microhttpd/internal.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src/microhttpd/internal.h')

diff --git a/src/microhttpd/internal.h b/src/microhttpd/internal.h
index 4d80d556..4a729dce 100644
--- a/src/microhttpd/internal.h
+++ b/src/microhttpd/internal.h
@@ -75,20 +75,28 @@ extern MHD_PanicCallback mhd_panic;
  */
 extern void *mhd_panic_cls;
 
+/* If we have Clang or gcc >= 4.5, use __buildin_unreachable() */
+#if defined(__clang__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+#define BUILTIN_NOT_REACHED __builtin_unreachable()
+#else
+#define BUILTIN_NOT_REACHED
+#endif
+
+
 #if HAVE_MESSAGES
 /**
  * Trigger 'panic' action based on fatal errors.
  *
  * @param msg error message (const char *)
  */
-#define MHD_PANIC(msg) mhd_panic (mhd_panic_cls, __FILE__, __LINE__, msg)
+#define MHD_PANIC(msg) do { mhd_panic (mhd_panic_cls, __FILE__, __LINE__, msg); BUILTIN_NOT_REACHED; } while (0)
 #else
 /**
  * Trigger 'panic' action based on fatal errors.
  *
  * @param msg error message (const char *)
  */
-#define MHD_PANIC(msg) mhd_panic (mhd_panic_cls, __FILE__, __LINE__, NULL)
+#define MHD_PANIC(msg) do { mhd_panic (mhd_panic_cls, __FILE__, __LINE__, NULL); BUILTIN_NOT_REACHED; } while (0)
 #endif
 
 
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