1 files changed, 56 insertions, 0 deletions
diff --git a/m4/xml2.m4 b/m4/xml2.m4
new file mode 100644
index 0000000..763755e
--- /dev/null
+++ b/m4/xml2.m4
@@ -0,0 +1,56 @@
+#
+# lldp_CHECK_XML2
+#
+
+
+AC_DEFUN([lldp_CHECK_XML2], [
+  if test x"$with_xml" != x"no"; then
+   PKG_CHECK_MODULES([libxml2], [libxml-2.0], [
+    dnl Found through pkg-config
+    AC_DEFINE_UNQUOTED([USE_XML], 1, [Define to indicate to enable XML support])
+    with_xml=yes
+   ],[
+    dnl Fallback to xml2-config
+    AC_PATH_TOOL([XML2_CONFIG], [xml2-config], [no])
+    if test x"$XML2_CONFIG" = x"no"; then
+      dnl No luck
+      if test x"$with_xml" = x"yes"; then
+         AC_MSG_FAILURE([*** no libxml2 support found])
+      fi
+      with_xml=no
+    else
+      dnl Check that it's working as expected
+      libxml2_LIBS=`${XML2_CONFIG} --libs`
+      libxml2_CFLAGS=`${XML2_CONFIG} --cflags`
+
+      _save_flags="$CFLAGS"
+      _save_libs="$LIBS"
+      CFLAGS="$CFLAGS ${libxml2_CFLAGS}"
+      LIBS="$LIBS ${libxml2_LIBS}"
+      AC_MSG_CHECKING([whether libxml-2 work as expected])
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([
+@%:@include <libxml/encoding.h>
+@%:@include <libxml/xmlwriter.h>
+],[
+	xmlDocPtr doc;
+	xmlTextWriterPtr xw = xmlNewTextWriterDoc(&doc, 0);
+        return (xw != NULL);
+])],[
+        AC_MSG_RESULT(yes)
+        AC_SUBST([libxml2_LIBS])
+        AC_SUBST([libxml2_CFLAGS])
+        AC_DEFINE_UNQUOTED([USE_XML], 1, [Define to indicate to enable XML support])
+        with_xml=yes
+      ],[
+        AC_MSG_RESULT(no)
+        if test x"$with_xml" = x"yes"; then
+            AC_MSG_FAILURE([*** libxml2 not working as expected])
+        fi
+        with_xml=no
+      ])
+      CFLAGS="$_save_flags"
+      LIBS="$_save_libs"
+    fi
+   ])
+  fi
+])