I've been trying to build osg on an arch system for a bit now and I'm running 
into some problems with newer libraries. I was trying to use the new version in 
the arch repo (3.2.1), but whenver I tried to load a .osg scene file, the 
entire computer would immediately lock up and it sounded like the computer 
suddenly started spinning the disk at hyper speed. You know, one of those 
really bad freeze ups where you can't even kill the process. I couldn't even 
get an error message because it froze up so fast. But displaying a basic window 
seemed to work fine.

So I've been trying to build 3.0.1 in hopes that it would be more stable, but 
I'm having problems with conflicts related to giflib, ffmpeg, and xine. The 
arch wiki already mentions that osg needs to link against the older 
compatibility version of ffmpeg and I've made two very small changes to the GIF 
reader class in the source to accomodate the problem with the newer giflib, but 
the build is starting to seem a bit ad-hoc.

How can I change the cmake build process so that it uses some older versions of 
ffmpeg and xine-lib? Or should I just ignore these extra plugins somehow, 
because I only really need osg for scene management and rendering?

Thanks!

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