Description: Disable use of xml_config. Use pkg_config macro to detect libxml2
Author: Rodrigo Carvalho <rodrigorsdc@gmail.com>

Index: dia-0.97.3+git20160930/configure.ac
===================================================================
--- dia-0.97.3+git20160930.orig/configure.ac
+++ dia-0.97.3+git20160930/configure.ac
@@ -401,30 +401,18 @@ dnl AM_PATH_GTK_2_0's fourth argument (m
 
 found_libxml=false
 if test $found_libxml = false; then
-  AC_CHECK_PROG(XML2_CONFIG, xml2-config, xml2-config)
-  if test "x$XML2_CONFIG" != x ; then
-    AC_MSG_CHECKING(for libxml >= 2.3.9)
-    vers=`$XML2_CONFIG --version | sed -e "s/libxml //" | awk 'BEGIN {FS=".";} { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
-
-    if test "$vers" -ge 2003009; then
-      AC_MSG_RESULT(found)
-      found_libxml=true
-      XML_LIBS="`$XML2_CONFIG --libs`"
-      XML_CFLAGS="`$XML2_CONFIG --cflags`"
-
-      if test "$enable_gnome_print" = "yes"; then
-          gnome-config --cflags print | \
-          grep gnome-xml 2>&1 >/dev/null && \
-          AC_MSG_ERROR(libxml2 found but gnome-print uses libxml1 ; this is a conflict.\nPlease do either provide libxml1 or disable gnome-print.)
-      fi
-      echo $GNOME_CFLAGS | \
-      grep gnome-xml 2>&1 >/dev/null && \
-      AC_MSG_ERROR(libxml2 found but one GNOME component uses libxml1 ; this is a conflict.\nPlease do either provide libxml1 or disable the offending GNOME component.)
-        
-    else
-      AC_MSG_RESULT(not found)
-    fi
+  PKG_CHECK_MODULES(LIBXML2, libxml-2.0 >= 2.3.9)
+  XML_LIBS=$LIBXML2_LIBS
+  XML_CFLAGS=$XML2_CFLAGS
+  found_libxml=true
+  if test "$enable_gnome_print" = "yes"; then
+    gnome-config --cflags print | \
+    grep gnome-xml 2>&1 >/dev/null && \
+      AC_MSG_ERROR(libxml2 found but gnome-print uses libxml1 ; this is a conflict.\nPlease do either provide libxml1 or disable gnome-print.)
   fi
+  echo $GNOME_CFLAGS | \
+  grep gnome-xml 2>&1 >/dev/null && \
+    AC_MSG_ERROR(libxml2 found but one GNOME component uses libxml1 ; this is a conflict.\nPlease do either provide libxml1 or disable the offending GNOME component.)
 fi
 
 if test $found_libxml = false; then