misc/sys/cdefs.h: Add _Noreturn macro for pre-C11 compilers

2014-07-02  Will Newton  <will.newton@linaro.org>
	    Paul Eggert  <eggert@cs.ucla.edu>

	* misc/sys/cdefs.h (_Noreturn): New macro, for pre-C11 compilers.

diff --git a/ChangeLog b/ChangeLog
index 7401bf2..934c47c 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-07-02  Will Newton  <will.newton@linaro.org>
+           Paul Eggert  <eggert@cs.ucla.edu>
+
+       * misc/sys/cdefs.h (_Noreturn): New macro, for pre-C11 compilers.
+
 2014-07-02  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
        * resolv/gethnamaddr.c: Add comment warning that the file is

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 4d958ea..a5c3224 100644 (file)
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -382,6 +382,14 @@
 # define __glibc_likely(cond)  (cond)
 #endif
 
+#if !defined _Noreturn && __STDC_VERSION__ < 201112 && !__GNUC_PREREQ (4,7)
+# if __GNUC_PREREQ (2,8)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# else
+#  define _Noreturn
+# endif
+#endif
+
 #include <bits/wordsize.h>
 
 #if defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH