When we try to install the package
On Ubuntu 12.10 ( 64 bits )
The automatic installation of rgl fail because GL/gl.h file is missing.
Users can solve temporary the problem by installing the debian package : mesa-common-dev before installing TXM.
( I have installed libglu1-mesa-dev, but i think that mesa-common-dev is sufficient ).
I think that the TXM package should contain a dependance with mesa-common-dev to solve the problem.