Gtk+ Version compatibilty?

[Daniel Pekelharing <legendstar gmail com>]

Hi all,

I've been working on an Autoconf system for my app,
When it comes to detecting Gtk+, I don't know how early a version I
should allow for?

On my FC4 system I have Gtk+-2.6.7, should I setup the configure script
to pass only on this or a later version?
Or is there somewhere I can find a backward version compatibility list?

Thanks!

-- 
Daniel Pekelharing
<legendstar gmail com>