[GHC] #11744: Latest Xcode update violates POSIX compliance of `nm -P`

[GHC]

#11744: Latest Xcode update violates POSIX compliance of `nm -P`
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        Reporter:  hvr           |                Owner:
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:
       Component:  Build System  |              Version:
      Resolution:                |             Keywords:
Operating System:  MacOS X       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by hvr):

 I was told there might be a `nm-classic(1)` tool provided by Xcode 7.3;
 can somebody verify if it's there, and if we can pass that one to
 `./configure --with-nm=...` to workaround this issue temporarily?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11744#comment:7>
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