[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 maeder):

 I think, I've a better patch. Always call "nm -P" (for POSIX.2 standard
 output). The output looks like

 {{{
 derivedConstantMAX_Vanilla_REG C 0000000b 0000000b
 }}}

 for gnm or like

 {{{
 derivedConstantMAX_Vanilla_REG D        1        b
 }}}

 for Solaris nm.

 So just take the first and last word (of 4 words) to extract the name and
 the size.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8781#comment:13>
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