Mesa
 

i have just downloaded the Mesa libraries into my box and did the following:

./configure
make
make clean
make install

then i wrote a simple opengl program. it compiled no problem.
but when i tried to run the exectuable, it gave this error:

Xlib: extension "GLX" missing on display ":0.0"
Segmentation fault

i don't really know what's missing... help would be appreciated