https://bugs.freedesktop.org/show_bug.cgi?id=48694

--- Comment #4 from Michel Dänzer michel@daenzer.net --- (In reply to comment #3)

FWIW, I made patches which remove radeon drivers from the scons build 2 years ago and some people weren't very happy about it.

At the time, the make based build system didn't support out-of-tree builds or even reliable parallel builds, both of which have been addressed with automake.