[GHC] #8781: check if GNU nm is really needed and if so let configure detect gnm

[GHC]

#8781: check if GNU nm is really needed and if so let configure detect gnm
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        Reporter:  maeder               |            Owner:
            Type:  feature request      |           Status:  new
        Priority:  normal               |        Milestone:
       Component:  Build System         |          Version:  7.8.1-rc1
      Resolution:                       |         Keywords:
Operating System:  Solaris              |     Architecture:  x86
 Type of failure:  Building GHC failed  |       Difficulty:  Unknown
       Test Case:                       |       Blocked By:
        Blocking:                       |  Related Tickets:
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Comment (by kgardas):

 To fix that it's IMHO a matter of extending deriveConstants to also
 support POSIX nm output. For example with POSIX nm and '-p' option we get
 very near to what GNU nm provides, but still there are some differences
 which should be handled by deriveConstants.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8781#comment:2>
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