[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:  kgardas
            Type:  feature request      |           Status:  patch
        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):

 Replying to [comment:35 maeder]:
 > No, no pair is returned by simply Nothing that is ignored later.

 Sorry, I don't understand. I still see that four members list is matched
 and mkMapping is invoked with x0 and x3 as its params. Isn't that true? So
 if I'm not mistaken then mkMapping is invoked for:
 {{{
 tmp.c      f        0        0
 }}}
 which is IMHO not good. Or is it? Please correct me if I'm wrong. Thanks.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8781#comment:36>
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