precompiled prefix header

[alex25]

well the system headers aren't supposed to change often or at all.

they do, on a real system :wink: i track cvs/svn for a lot of the packages vdrift depends on (mesa, sdl, openal, etc). the apple stuff should've gone in some compatibility header (same with windows or unix specific stuff). for the rest, each file should include the header files in needs. let's not reinvent (badly) the wheel.

oh, and speaking of definitions.h. it shouldn't be in svn as it is automatically generated. i get a conflict every time i do an svn update but i've learned to ignore it.

--alex--