This patch does the following: 
 
        Puts the correct library directories for linux x86_64 
        systems into setup.py search paths. 
 
        Fixes a type-casting bug in the _tkinter module 
        that would cause incorrect pointer printing on 64-bit 
        systems (a pointer was cast to an int). 
 
        Adds imageop and rgbimg to the list of expected 
        to be skipped tests on 64-bit platforms 
 
With these changes, I get a clean build and a clean "make 
test". 
 
I also ran the regression suite in '-uall' mode.  This was 
mostly good, and the few errors that occurred do not appear 
related to x86_64.  (Well, with the possible exception of 
some linux audio-related cores which I don't know about yet) 
 
/Bob