[GHC] #14982: LLVM default -mcpu setting inhibits customization

[GHC]

#14982: LLVM default -mcpu setting inhibits customization
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        Reporter:  tommd             |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.4.2
       Component:  Compiler (LLVM)   |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  D4548
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"cb1ee7e10e50b11b4a24e56b425e8f3485d298d5/ghc"
 cb1ee7e1/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="cb1ee7e10e50b11b4a24e56b425e8f3485d298d5"
 Do not supply `-mcpu` if `-optlc` provides `-mcpu` already.

 Reviewers: bgamari

 Subscribers: thomie, carter

 GHC Trac Issues: #14982

 Differential Revision: https://phabricator.haskell.org/D4548
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14982#comment:4>
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