From 5d6c5d6cf6efeccc9f8278b84536e7234c2c36d0 Mon Sep 17 00:00:00 2001
From: Levi Morrison <levi.morrison@datadoghq.com>
Date: Mon, 2 Oct 2023 08:55:20 -0600
Subject: [PATCH] fix -Wreturn-type and -Wstrict-prototypes in gd configure
 (#12328)

---
 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 b3420740270..826d7c7c826 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"