[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 carter):

 heres a listing of the new apple nm flag options/output, for comparision
 with the prior one

 {{{


 $ /Users/carter/Desktop/bad-cli-tools/Command\ Line\ Tools\ \(OS\ X\
 10.11\)/CLTools_Executables.pkg.cpio.xz/Library/Developer/CommandLineTools/usr/bin/nm
 --help
 OVERVIEW: llvm symbol table dumper

 USAGE: nm [options] <input files> --s Dump only symbols from this segment
 and section name, Mach-O only

 OPTIONS:

 General options:

   -B                      - Alias for --format=bsd
   -P                      - Alias for --format=posix
   -aarch64-neon-syntax    - Choose style of NEON code to emit from AArch64
 backend:
     =generic              -   Emit generic NEON assembly
     =apple                -   Emit Apple-style NEON assembly
   -arch=<string>          - architecture(s) from a Mach-O file to dump
   -debug-syms             - Show all symbols, even debugger only
   -defined-only           - Show only defined symbols
   -dynamic                - Display the dynamic symbols instead of normal
 symbols.
   -enable-objc-arc-opts   - enable/disable all ARC Optimizations
   -enable-scoped-noalias  -
   -enable-tbaa            -
   -extern-only            - Show only external symbols
   -format                 - Specify output format
     =bsd                  -   BSD format
     =sysv                 -   System V format
     =posix                -   POSIX.2 format
     =darwin               -   Darwin -m format
   -join-liveintervals     - Coalesce copies (default=true)
   -just-symbol-name       - Print just the symbol's name
   -m                      - Alias for --format=darwin
   -no-llvm-bc             - Disable LLVM bitcode reader
   -no-sort                - Show symbols in order encountered
   -numeric-sort           - Sort symbols by address
   -print-after-all        - Print IR after each pass
   -print-armap            - Print the archive map
   -print-before-all       - Print IR before each pass
   -print-file-name        - Precede each symbol with the object file it
 came from
   -print-size             - Show symbol size instead of address
   -reverse-sort           - Sort in reverse order
   -rng-seed=<seed>        - Seed for the random number generator
   -s=<string>             - Dump only symbols from this segment and
 section name, Mach-O only
   -size-sort              - Sort symbols by size
   -stackmap-version=<int> - Specify the stackmap encoding version (default
 = 1)
   -time-passes            - Time each pass, printing elapsed time for each
 on exit
   -undefined-only         - Show only undefined symbols
   -verify-dom-info        - Verify dominator info (time consuming)
   -verify-loop-info       - Verify loop info (time consuming)
   -verify-scev            - Verify ScalarEvolution's backedge taken counts
 (slow)
   -x                      - Print symbol entry in hex, Mach-O only
   -x86-asm-syntax         - Choose style of code to emit from X86 backend:
     =att                  -   Emit AT&T-style assembly
     =intel                -   Emit Intel-style assembly

 Generic Options:

   -help                   - Display available options (-help-hidden for
 more)
   -help-list              - Display list of available options (-help-list-
 hidden for more)
   -version                - Display the version of this program
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11744#comment:6>
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