[GHC] #13495: ghc-stage1: panic! (the 'impossible' happened) creating cross compiler for PPC

[GHC]

#13495: ghc-stage1: panic! (the 'impossible' happened) creating cross compiler for
PPC
----------------------------------------+-------------------------------
        Reporter:  jms                  |                Owner:  (none)
            Type:  bug                  |               Status:  new
        Priority:  normal               |            Milestone:  8.2.1
       Component:  Compiler             |              Version:  8.0.2
      Resolution:                       |             Keywords:
Operating System:  Linux                |         Architecture:  powerpc
 Type of failure:  Building GHC failed  |            Test Case:
      Blocked By:                       |             Blocking:
 Related Tickets:                       |  Differential Rev(s):
       Wiki Page:                       |
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Comment (by slyfox):

 '''quick-cross.mk''' explicitly enables '''llvm''' backend:
 {{{
 GhcStage2HcOpts    = -O0 -fllvm
 GhcLibHcOpts       = -O -fllvm
 }}}

 You might want to disable that as you are using '''--enable-
 unregisterised'''.

 I think '''GHC''' should ignore '''-fllvm''' (with a warning) if compiler
 targets
 unregisterised codegen.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13495#comment:3>
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