From 3121171f56c2d4a273b89a9d1d47d9f50e027770 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Thu, 25 Feb 2016 18:30:27 +0100
Subject: otp: Add gcc option -Werror=implicit

to get errors for missing function and variable declarations.
---
 erts/configure.in | 1 +
 1 file changed, 1 insertion(+)

(limited to 'erts/configure.in')

diff --git a/erts/configure.in b/erts/configure.in
index ba735fe921..8d178107a0 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -584,6 +584,7 @@ fi
 if test "x$GCC" = xyes; then
   # Treat certain GCC warnings as errors
   LM_TRY_ENABLE_CFLAG([-Werror=return-type], [WERRORFLAGS])
+  LM_TRY_ENABLE_CFLAG([-Werror=implicit], [WERRORFLAGS])
 
   # until the emulator can handle this, I suggest we turn it off!
   #WFLAGS="-Wall -Wshadow -Wcast-qual -Wmissing-declarations"
-- 
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