[OpenAFS] Compiling on FC6?

[William John Murray]

  Hello guys,
            I have got in the habit of compiling AFS on Fedora, 
and cannot find anything which works with the latest kernels - 
while there are clearly RPMs out there, so someone has solved this.
   I think I saw that 1.4.3 will be released soon. Is this the 1_4_2a
branch?
   Neither it nor head seem to work. Head stops at:

 error: implicit declaration of function `IN6_IS_ADDR_V4COMPAT`

  Can anyone suggest where to find something which works?
        Thanks,
              Bill
Ps Or should I just switch to RPM's - is there some info on the ATrpms
stuff?