From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Mon, 24 Sep 2012 15:21:16 +0000 (+0200)
Subject: Provide a NORETURN_ATTRIBUTE macro similar to PRINTF_ATTRIBUTE
X-Git-Tag: 0.15_rc1~237
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=25d97b97914e2bddc1b1d82ac5ebbe8608ad8e74

Provide a NORETURN_ATTRIBUTE macro similar to PRINTF_ATTRIBUTE

This attribute is understood by gcc since version 2.5. clang provides
support for testing for function attributes using __has_attribute. For
other compilers this macro evaluates to the empty string.

Signed-off-by: Justus Winter <4winter@informatik.uni-hamburg.de>
---

diff --git a/compat/function-attributes.h b/compat/function-attributes.h
index 18f90903..8450a17d 100644
--- a/compat/function-attributes.h
+++ b/compat/function-attributes.h
@@ -28,4 +28,20 @@
 #define __has_attribute(x) 0
 #endif
 
+/* Provide a NORETURN_ATTRIBUTE macro similar to PRINTF_ATTRIBUTE from
+ * talloc.
+ *
+ * This attribute is understood by gcc since version 2.5. clang
+ * provides support for testing for function attributes.
+ */
+#ifndef NORETURN_ATTRIBUTE
+#if (__GNUC__ >= 3 ||				\
+     (__GNUC__ == 2 && __GNUC_MINOR__ >= 5) ||	\
+     __has_attribute (noreturn))
+#define NORETURN_ATTRIBUTE __attribute__ ((noreturn))
+#else
+#define NORETURN_ATTRIBUTE
+#endif
+#endif
+
 #endif