From 8198df84f06ac88787c5f26f856c43336c813de4 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Tue, 24 Jun 2014 13:01:44 -0700
Subject: [PATCH] Suppress warnings about variadic macros.

---
 format.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/format.h b/format.h
index 179a823e..04c11e75 100644
--- a/format.h
+++ b/format.h
@@ -52,7 +52,6 @@
 # if FMT_GCC_VERSION >= 406
 #  pragma GCC diagnostic push
 #  pragma GCC diagnostic ignored "-Wlong-long"
-#  pragma GCC diagnostic ignored "-Wvariadic-macros"
 # endif
 #else
 # define FMT_GCC_EXTENSION
@@ -2095,6 +2094,12 @@ inline void FormatDec(char *&buffer, T value) {
 }
 }
 
+#if FMT_GCC_VERSION
+// Use the system_header pragma to suppress warnings about variadic macros
+// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't work.
+# pragma GCC system_header
+#endif
+
 #define FMT_CONCATENATE(arg1, arg2)   FMT_CONCATENATE1(arg1, arg2)
 #define FMT_CONCATENATE1(arg1, arg2)  FMT_CONCATENATE2(arg1, arg2)
 #define FMT_CONCATENATE2(arg1, arg2)  arg1##arg2