https://bugs.gentoo.org/955781

--- a/configure.ac
+++ b/configure.ac
@@ -135,10 +133,9 @@ dnl AM_LANGINFO_CODESET
 
 AM_ICONV
 
-ifdef([AM_PATH_XML2],
-    [AM_PATH_XML2(2.6.0, , AC_MSG_ERROR([You must have libxml2 >= 2.6.0 installed]))],
-    [errprint([You must have libxml2 (>= 2.6.0) installed
-])m4_exit(1)AC_MSG_ERROR([You must have libxml2 (>= 2.6.0) installed])])
+PKG_CHECK_MODULES(XML, [libxml-2.0])
+AC_SUBST(XML_CFLAGS)
+AC_SUBST(XML_LIBS)
 
 AC_CHECK_DECLS(O_BINARY, , , [ #include <fcntl.h> ] )
 
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,7 +8,7 @@ endif
 nodist_bin_SCRIPTS = dvddirdel
 
 AM_CPPFLAGS = -DSYSCONFDIR="\"$(sysconfdir)\"" \
-    @XML_CPPFLAGS@ @MAGICK_CPPFLAGS@ @FREETYPE_CPPFLAGS@ @FRIBIDI_CFLAGS@ @FONTCONFIG_CFLAGS@
+    @XML_CFLAGS@ @MAGICK_CPPFLAGS@ @FREETYPE_CPPFLAGS@ @FRIBIDI_CFLAGS@ @FONTCONFIG_CFLAGS@
 AM_CFLAGS = -Wall
 
 dvdauthor_SOURCES = dvdauthor.c common.h dvdauthor.h da-internal.h \