gtk-doc knows your package version

tl;dr: gtk-doc will now bind autoconf PACKAGE_* variables for use in your documentation.

For various modules which use gtk-doc, it’s a bit of a rite of passage to copy some build machinery from somewhere to generate a version.xml file which contains your package version, so that you can include it in your generated documentation (“Documenting version X of package Y”).

This is a bit of a pain. It doesn’t have to happen any longer.

gtk-doc master (to become 1.25) now generates a xml/gtkdocentities.ent file containing a few PACKAGE_* variables as generated by autoconf. So, you can now get rid of your version.xml machinery, and change your top-level documentation XML file’s DOCTYPE to the following:

<?xml version="1.0"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
 <!ENTITY % local.common.attrib "xmlns:xi CDATA #FIXED ''">
 <!ENTITY % gtkdocentities SYSTEM "xml/gtkdocentities.ent">

You can now use &package_string;, &package_version;, &package_url;, etc. in your documentation. See gtk-doc.make for a full list.

Thanks to Stefan for getting this feature in!