talloc: also use portable __has_attribute macro to check for attribute support

Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/lib/talloc/talloc.h b/lib/talloc/talloc.h
index b991dd3c4f5842a3d1353336ecef69f3aa6ef98a..0154bf3bbf61e7ad45aed67f308dfc3f19aa3282 100644 (file)
--- a/lib/talloc/talloc.h
+++ b/lib/talloc/talloc.h
@@ -89,8 +89,13 @@ typedef void TALLOC_CTX;
 #define TALLOC_DEPRECATED 0
 #endif
 
+/* for old gcc releases that don't have the feature test macro __has_attribute */
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
 #ifndef PRINTF_ATTRIBUTE
-#if (__GNUC__ >= 3)
+#if __has_attribute(format) || (__GNUC__ >= 3)
 /** Use gcc attribute to check printf fns.  a1 is the 1-based index of
  * the parameter containing the format, and a2 the index of the first
  * argument. Note that some gcc 2.x versions don't handle this