From: Petr Tesarik <petr@tesarici.cz>
Subject: gnulib: Provide a definition of __warndecl 
Upstream: never, compatibility with SLE12 only

The local copy of string.h includes the system string.h. Older glibc makes
use of the __warndecl macro, but gnulib's cdefs.h does not provide one.

Signed-off-by: Petr Tesarik <petr@tesarici.cz>
---
 gdb-10.2/gnulib/import/cdefs.h |   12 ++++++++++++
 1 file changed, 12 insertions(+)

--- a/gnulib/import/cdefs.h
+++ b/gnulib/import/cdefs.h
@@ -704,4 +704,16 @@ _Static_assert (0, "IEEE 128-bits long d
 # define __attribute_returns_twice__ /* Ignore.  */
 #endif
 
+#if __GNUC_PREREQ (4,3)
+# define __warndecl(name, msg) \
+  extern void name (void) __attribute__((__warning__ (msg)))
+# define __warnattr(msg) __attribute__((__warning__ (msg)))
+# define __errordecl(name, msg) \
+  extern void name (void) __attribute__((__error__ (msg)))
+#else
+# define __warndecl(name, msg) extern void name (void)
+# define __warnattr(msg)
+# define __errordecl(name, msg) extern void name (void)
+#endif
+
 #endif	 /* sys/cdefs.h */