Building X with CCVER=gcc3

[Rahul Siddharthan]

I successfully built and installed world with CCVER=gcc3.  
Now how do I do the same with XFree86?  Surely it's possible, but when
I tried I ran into a couple of strange compile errors (undefined 
SIZE_T_MAX in one file, which I fixed by including machine/limits.h,
and undefined XFree86Version in another file, which I inserted
manually).  But it didn't build or install any shared libraries, only
the .a libraries.

Rahul