From e4100a47b7d06672c52ab2f43899f7f12ce2d251 Mon Sep 17 00:00:00 2001
From: Levi Morrison <levi.morrison@datadoghq.com>
Date: Fri, 29 Sep 2023 16:36:57 -0600
Subject: [PATCH] fix -Wreturn-type and -Wstrict-prototypes in gd configure

This kind of thing is why -Werror is enabled late, but in this case,
I don't see any reason why we shouldn't just fix it.
---
 ext/gd/config.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/gd/config.m4 b/ext/gd/config.m4
index b342074027059..826d7c7c826a2 100644
--- a/ext/gd/config.m4
+++ b/ext/gd/config.m4
@@ -194,7 +194,7 @@ dnl Various checks for GD features
 
     PHP_TEST_BUILD(foobar, [], [
       AC_MSG_ERROR([GD build test failed. Please check the config.log for details.])
-    ], [ $GD_SHARED_LIBADD ], [char foobar () {}])
+    ], [ $GD_SHARED_LIBADD ], [char foobar(void) { return '\0'; }])
 
   else
     extra_sources="gd_compat.c"