From 66ddd22a5c9a0a7c868da56fcd4c5cb309ec2c3b Mon Sep 17 00:00:00 2001
From: Wei Shi S <wei.s.shi@ericsson.com>
Date: Wed, 11 Apr 2018 09:44:08 +0800
Subject: [PATCH] Add attribute format in nghttp2_debug_vprintf_callback

Change-Id: I991b84ce731adbd25f5cdf565333db1a19e75ec6
---
 lib/includes/nghttp2/nghttp2.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h
index e5217fec..e960a8dc 100644
--- a/lib/includes/nghttp2/nghttp2.h
+++ b/lib/includes/nghttp2/nghttp2.h
@@ -5337,7 +5337,11 @@ nghttp2_stream_get_sum_dependency_weight(nghttp2_stream *stream);
  * ``DEBUGBUILD`` macro defined.
  */
 typedef void (*nghttp2_debug_vprintf_callback)(const char *format,
-              va_list args)  __attribute__ ((format(printf, 1, 0)));
+              va_list args)
+#ifdef __GNUC__
+  __attribute__ ((format(printf, 1, 0)))
+#endif
+;
 
 /**
  * @function