* configure.in (ATTRIBUTE_FORMAT, ATTRIBUTE_FORMAT_PRINTF): New macros.

2 files changed, 18 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index d7438014f68..5caab5fe8e2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-04-05  Paul Eggert  <eggert@cs.ucla.edu>
+
+        * configure.in (ATTRIBUTE_FORMAT, ATTRIBUTE_FORMAT_PRINTF): New macros.
+
 2011-04-01  Paul Eggert  <eggert@cs.ucla.edu>
 
         Replace 2 copies of readlink code with 1 gnulib version (Bug#8401).
diff --git a/configure.in b/configure.in
index 77deef8dba5..fef19f27642 100644
--- a/configure.in
+++ b/configure.in
@@ -3581,6 +3581,20 @@ typedef unsigned size_t;
 #define EXTERNALLY_VISIBLE
 #endif
 
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define ATTRIBUTE_FORMAT(spec) /* empty */
+#endif
+
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
+# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
+   ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
+#else
+# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
+   ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
+#endif
+
 /* Some versions of GNU/Linux define noinline in their headers.  */
 #ifdef noinline
 #undef noinline