It would seem that I somehow accidentally deleted libGL.so, which is odd considering I don't remember ever doing so, and even more odd that it's the real file that's gone, not the symlinnks.
(That is, I have
libGL.so -> libGL.so.1
libGL.so.1 -> libGL.so.1.2
but not the last item in the chain: libGL.so.1.2)

My setup is as follows:
XFree86 4.2.1 (DRI enabled)
nVidia TNT2 drivers installed
RH9

What would be the best way to go about getting or re-creating libGL.so.1.2? Re-install XFree? what would be the best way of doing that without having to re-configure?

edit: okay, upon further inspection I found out something pretty odd... an old OGL test program I had made that was still compiled worked. ldd turned up:

libGL.so.1 => /usr/lib/tls/libGL.so.1 (0x40263000)

this is slightly confusing to me... libGL.so is linked to libGL.so.1 which would be the same as this depends on... that in turn does NOT point to /usr/lib/tls/libGL.so.1.

Also, anyone know what this tls directroy might stand for/have been made for?

I'm getting very confused... I ran into my problems first when I was trying to compile an OGL app...

If you're using nVidia's proprietary driver, it could be the one supplying the file you need.

If not, depending on your particular distro, you may have a separate libMesaGL pkg, but chances are you'll need to reinstall X ...unless you wanna dig in the binary pkg to get that particular file only.

Your config should be safe unless you run a config app but if you wanna save it, it's usually /etc/X11/XF86Config-4.