From 213b6c7c63a2fca5450d3dd7672a9472e8235ed1 Mon Sep 17 00:00:00 2001
From: Alessandro Toppi <atoppi@meetecho.com>
Date: Fri, 29 Jan 2021 12:13:44 +0100
Subject: [PATCH] Make compiler fail if implicit-function-declaration is
 encountered.

---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c3160f9ec7..c75c6b98de 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,7 +51,8 @@ CFLAGS="$CFLAGS \
 	-Wstrict-prototypes \
 	-Wswitch-default \
 	-Wunused \
-	-Wwrite-strings"
+	-Wwrite-strings \
+	-Werror=implicit-function-declaration"
 
 case "$CC" in
 clang*)