[GHC] #8620: make -j3 build of head on Mac 10.9 with xcode 5 fails

[GHC]

#8620: make -j3 build of head on Mac 10.9 with xcode 5 fails
----------------------------------------+----------------------------------
        Reporter:  George               |            Owner:
            Type:  bug                  |           Status:  new
        Priority:  normal               |        Milestone:  7.8.2
       Component:  Compiler             |          Version:
      Resolution:                       |         Keywords:
Operating System:  MacOS X              |     Architecture:  x86_64 (amd64)
 Type of failure:  Building GHC failed  |       Difficulty:  Unknown
       Test Case:                       |       Blocked By:
        Blocking:                       |  Related Tickets:
----------------------------------------+----------------------------------

Comment (by nomeata):

 Just run `make` again. I believe this is a known and old problem:
 [wiki:Building/Troubleshooting#Makehasrestarteditself3timesisthereamakefilebug]

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8620#comment:10>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler