From 12d6389c14816811c2418062b914b36a8a27ef5d Mon Sep 17 00:00:00 2001
From: =?utf8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sun, 18 Dec 2016 15:47:41 -0500
Subject: [PATCH] build-sys: treat format errors as fatal (#4910)

We currently don't expect any warnings about format strings, on any
architecture (#4612 removed the last few warnings). Turn those warnings into
errors in the future.

As requested by Martin Pitt.

gcc documentation says that -Wformat=2 includes -Wformat-security and
-Wformat-nonliteral so don't include them explicitly.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 4a05702..a071bfa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -155,7 +155,6 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -Wall \
         -Wextra \
         -Wundef \
-        "-Wformat=2 -Wformat-security -Wformat-nonliteral" \
         -Wlogical-op \
         -Wmissing-include-dirs \
         -Wold-style-definition \
@@ -168,6 +167,7 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
         -Werror=implicit-function-declaration \
         -Werror=missing-declarations \
         -Werror=return-type \
+        -Werror=format=2 \
         -Wstrict-prototypes \
         -Wredundant-decls \
         -Wmissing-noreturn \
-- 
2.7.4