[GHC] #8301: error BaseReg must be in a register for THREADED_RTS

[GHC]

#8301: error BaseReg must be in a register for THREADED_RTS
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        Reporter:  erikd                |            Owner:
            Type:  bug                  |           Status:  new
        Priority:  normal               |        Milestone:
       Component:  Compiler             |          Version:  7.7
      Resolution:                       |         Keywords:
Operating System:  Linux                |     Architecture:  powerpc64
 Type of failure:  Building GHC failed  |       Difficulty:  Unknown
       Test Case:                       |       Blocked By:
        Blocking:                       |  Related Tickets:
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Comment (by simonmar):

 I can't see what I might have broken - that commit only modifies files
 under `rts/`.  Could you run that failing command with `-v`?  (just
 copy/paste it, add the `-v` and run it from the top of your GHC build)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8301#comment:5>
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