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-rw-r--r--source3/include/includes.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/source3/include/includes.h b/source3/include/includes.h
index ec4628e51f..3b2b1db877 100644
--- a/source3/include/includes.h
+++ b/source3/include/includes.h
@@ -54,8 +54,10 @@
#endif
#endif
-/* use gcc attribute to check printf fns */
#ifdef __GNUC__
+/** 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. **/
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
#else
#define PRINTF_ATTRIBUTE(a1, a2)