gst-plugin-docs.m4: fix autogen.sh warnings

Fix "AM_PATH_PYTHON([2.7]) is m4_require'd but not m4_defun'd"
warnings in autogen.sh. Just do AC_REQUIRE(AM_PATH_PYTHON)
without any arguments, which makes more sense. And disable
plugin doc building if python was not found.

diff --git a/m4/gst-plugin-docs.m4 b/m4/gst-plugin-docs.m4
index 4fb20ee..0e2ab6e 100644 (file)
--- a/m4/gst-plugin-docs.m4
+++ b/m4/gst-plugin-docs.m4
@@ -6,13 +6,17 @@ dnl used when building the plugin documentation
 AC_DEFUN([AG_GST_PLUGIN_DOCS],
 [
   AC_BEFORE([GTK_DOC_CHECK],[$0])dnl check for gtk-doc first
-  AC_REQUIRE([AM_PATH_PYTHON([2.7])])dnl find python first
+  AC_REQUIRE([AM_PATH_PYTHON])dnl find python first
 
   build_plugin_docs=no
   AC_MSG_CHECKING([whether to build plugin documentation])
   if test x$enable_gtk_doc = xyes; then
-    build_plugin_docs=yes
-    AC_MSG_RESULT([yes])
+    if test x$PYTHON != x; then
+      build_plugin_docs=yes
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_RESULT([no (python not found)])
+    fi
   else
     AC_MSG_RESULT([no (gtk-doc disabled or not available)])
   fi