From 5c963205adf0bb2d5ccb66c63eb434b0bab3c4dc Mon Sep 17 00:00:00 2001
From: Benjamin Dauvergne <bdauvergne@entrouvert.com>
Date: Tue, 13 Feb 2024 16:00:39 +0100
Subject: [PATCH] configure.ac: raise errors for implicit function declarations
 (#86867)

---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 79d06985..7588ff8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -90,6 +90,7 @@ fi
 dnl
 dnl Check for programs
 dnl
+CFLAGS="$CFLAGS -Werror=implicit-function-declaration"
 AC_PROG_CC
 AM_CFLAGS=""
 AC_HEADER_STDC