PPC not getting __WORDSIZE set

[Bryan Kearney]

Word of warning.. I am no too familiar with C across platforms.  I am 
trying to package ruby-ffi (spec file is at [1]) and when I do a scratch 
build in Koji [2] it runs fine on x86 but is failing in ppc_64. It 
appears that __WORDSIZE is not being set [3]. I looked at the CFLags for 
the x86_64 and they are the same, so I assumed things would run fine. 
Can anyone point me at what to look at next?

-- bk

[1] Spec file: http://bkearney.fedorapeople.org/ruby-ffi.spec
[2] Main Build: http://koji.fedoraproject.org/koji/taskinfo?taskID=1783879
[3] Failing Build Log: 
http://koji.fedoraproject.org/koji/getfile?taskID=1783882&name=build.log
[4] SRPM: http://bkearney.fedorapeople.org/ruby-ffi-0.5.1-1.fc11.src.rpm