From 3da09318114773af4b09aead0f0c917b0ad11928 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Sun, 30 Apr 2023 13:16:12 +0200
Subject: libxml.m4: Fix "possibly undefined macro" error

See #527.
---
 libxml.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libxml.m4 b/libxml.m4
index d8ce7c59..27ad84d4 100644
--- a/libxml.m4
+++ b/libxml.m4
@@ -2,7 +2,7 @@ dnl AM_PATH_XML2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
 dnl Test for XML, and define XML_CPPFLAGS and XML_LIBS
 dnl
 AC_DEFUN([AM_PATH_XML2],[
-  AC_MSG_WARN([[AM_PATH_XML2 is deprecated, use PKG_CHECK_MODULES instead]])
+  m4_warn([obsolete], [AM_PATH_XML2 is deprecated, use PKG_CHECK_MODULES instead])
   AC_REQUIRE([PKG_PROG_PKG_CONFIG])
 
   verdep=ifelse([$1], [], [], [">= $1"])
-- 
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