From 32ec3063df81161f87ef8eca6f3c7c78e19baff9 Mon Sep 17 00:00:00 2001
From: Marcel Raad <raad@teamviewer.com>
Date: Fri, 16 Jun 2017 14:08:28 +0200
Subject: curl-compilers.m4: enable missing-variable-declarations clang warning

It usually warns when forgetting to declare TU-local variables static.

Closes https://github.com/curl/curl/pull/1578
---
 m4/curl-compilers.m4 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 7d53953c9..9efe2ae23 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -892,6 +892,11 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
             tmp_CFLAGS="$tmp_CFLAGS -Wshift-sign-overflow"
           fi
           #
+          dnl Only clang 3.2 or later
+          if test "$compiler_num" -ge "302"; then
+            tmp_CFLAGS="$tmp_CFLAGS -Wmissing-variable-declarations"
+          fi
+          #
           dnl Only clang 3.6 or later
           if test "$compiler_num" -ge "306"; then
             tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
-- 
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