[GHC] #13541: Make it easier to use the gold linker

[GHC]

#13541: Make it easier to use the gold linker
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         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 bgamari):

 Another unfortunate aspect of the status quo is that the user may think
 that passing `LD=gold` to `./configure` will configure the compiler to use
 `gold`, but they would be wrong.

 Another approach that may be would be to check whether `LD` is set to
 `gold` and if so check for a functional `-fuse-ld=gold`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13541#comment:3>
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