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

[GHC]

#11744: Latest Xcode update violates POSIX compliance of `nm -P`
---------------------------------+--------------------------------------
        Reporter:  hvr           |                Owner:
            Type:  bug           |               Status:  new
        Priority:  highest       |            Milestone:
       Component:  Build System  |              Version:
      Resolution:                |             Keywords:
Operating System:  MacOS X       |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):  phab:D2113
       Wiki Page:                |
---------------------------------+--------------------------------------

Comment (by bgamari):

 It actually appears that the latest XCode release (8.1) fixes this. It
 shouldn't be necessary to use `nm-classic` with,
 {{{
 $ nm --version
 Apple LLVM version 8.0.0 (clang-800.0.38)
   Optimized build.
   Default target: x86_64-apple-darwin16.0.0
   Host CPU: haswell
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11744#comment:20>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler