[GHC] #9055: unregisterised build fails with: globalRegMaybe not defined for this platform

[GHC]

#9055: unregisterised build fails with: globalRegMaybe not defined for this
platform
-----------------------------------+---------------------------------------
       Reporter:  trommler         |             Owner:
           Type:  bug              |            Status:  new
       Priority:  normal           |         Milestone:
      Component:  Compiler         |           Version:  7.9
       Keywords:                   |  Operating System:  Unknown/Multiple
   Architecture:                   |   Type of failure:  Compile-time crash
  Unknown/Multiple                 |         Test Case:
     Difficulty:  Unknown          |          Blocking:
     Blocked By:                   |
Related Tickets:                   |
-----------------------------------+---------------------------------------
 Building HEAD fails with:
 {{{
 make[1]: *** [rts/dist/build/Updates.o] Error 1
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 7.9.20140429 for powerpc64-unknown-linux):
         globalRegMaybe not defined for this platform
 }}}
 on Linux powerpc64 and x86_64 (unregisterised).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9055>
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