X-Git-Url: https://git.cworth.org/git?p=notmuch;a=blobdiff_plain;f=compat%2Ffunction-attributes.h;fp=compat%2Ffunction-attributes.h;h=8450a17df90b9a656f0b438a3ccc0216cb56e4a3;hp=18f90903905ef17ff8a97a30577b6f4aafd195c0;hb=25d97b97914e2bddc1b1d82ac5ebbe8608ad8e74;hpb=da12807734cc90d8bf78ce5814636aaf5a18827b

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