From db7f8031e7c2992de9290877fc49a81dc1ac1dfd Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <rhaberkorn@fmsbw.de>
Date: Mon, 20 Oct 2025 01:16:46 +0200
Subject: fixup: AX_PTRDIFF_ALIASES_INT should enable -Werror

---
 m4/ax_ptrdiff_aliases_int.m4 | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'm4')

diff --git a/m4/ax_ptrdiff_aliases_int.m4 b/m4/ax_ptrdiff_aliases_int.m4
index f7175cd..d28e864 100644
--- a/m4/ax_ptrdiff_aliases_int.m4
+++ b/m4/ax_ptrdiff_aliases_int.m4
@@ -1,5 +1,8 @@
 
 AC_DEFUN([AX_PTRDIFF_ALIASES_INT], [
+	ax_saved_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS -Werror"
+
 	AC_CACHE_CHECK([whether ptrdiff_t aliases int], [ax_cv_ptrdiff_aliases_int], [
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 			@%:@include <stddef.h>
@@ -13,4 +16,6 @@ AC_DEFUN([AX_PTRDIFF_ALIASES_INT], [
 	AS_IF([test "x$ax_cv_ptrdiff_aliases_int" = "xyes"], [
 		AC_DEFINE([PTRDIFF_ALIASES_INT], [1], [Whether ptrdiff_t aliases int])
 	])
+
+	CFLAGS="$ax_saved_CFLAGS"
 ])dnl
-- 
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