[GHC] #9709: Make restarts itself sometimes, and that's OK

[GHC]

#9709: Make restarts itself sometimes, and that's OK
-------------------------------------+-------------------------------------
       Reporter:  goldfire           |                   Owner:
           Type:  bug                |                  Status:  new
       Priority:  normal             |               Milestone:
      Component:  Build System       |                 Version:  7.9
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:                     |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
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 I fairly frequently get the message that `make` has restarted itself

 {{{
 ghc.mk:100: *** Make has restarted itself 2 times; is there a makefile
 bug? See
 http://ghc.haskell.org/trac/ghc/wiki/Building/Troubleshooting#Makehasrestarteditself3timesisthereamakefilebug
 for details.  Stop.
 }}}

 but then when I say `make` again, things proceed just fine. In particular,
 this always (I think) happens after I `make clean` in the `libraries`
 directory.

 If it matters, I always use the `-j` flag to `make`, sometimes with 2
 cores and sometimes with 4. I'm on Mac OS 10.8.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9709>
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