[GHC] #13539: Options -pgmlclang and -pgmlc overlap

[GHC]

#13539: Options -pgmlclang and -pgmlc overlap
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           Reporter:  nh2            |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Documentation  |           Version:  8.0.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Documentation
  Unknown/Multiple                   |  bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I tried to tell GHC to use `clang` with `-pgmlclang`, and only after some
 time found out that it won't work, because GHC interprets that as `-pgmlc`
 `lang` (surprise, `-pgmlc` is also an option).

 The user manual suggests that `pgmc<value>` (without space) is the
 recommended syntax. If spaces are in fact allowed, we should change the
 manual.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13539>
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