commit 60aa3ffa05f6b40db191a880e9e622d608744c1f
Author: Aleix Boné <aleix.boneribo@bsc.es>
Date:   Sun Jul 21 12:11:30 2025 +0200

    fix libxml2 deprecated macro

diff --git a/configure.ac b/configure.ac
index 7fe1876..3ce1091 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,10 @@ AC_PROG_CPP
 AC_PROG_CXXCPP
 AC_PROG_SED
 
-AM_PATH_XML2
+PKG_PROG_PKG_CONFIG
+PKG_CHECK_MODULES([XML], [libxml-2.0])
+
+AC_SUBST(XML_CPPFLAGS, $XML_CFLAGS)
 
 AX_BOOST_BASE(1.36)
 AX_BOOST_SERIALIZATION