[GHC] #9678: Warning about __sync_fetch_and_nand semantics from gcc

[GHC]

#9678: Warning about __sync_fetch_and_nand semantics from gcc
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        Reporter:  gintas            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  low               |               Milestone:
       Component:  Build System      |                 Version:  7.9
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thomie):

 * priority:  normal => low
 * status:  patch => new
 * differential:  Phab:D334 =>


Comment:

 >> austin says:
 >> In general I think we should actively move this to an autoconf check
 that then sets ghc-options appropriately, based on if the C compiler
 specified actually supports this flag or not. This will be much more
 robust in general, I think.

 > gintas says:
 > Makes sense. Probably more trouble than it's worth, that warning should
 get dropped from gcc eventually...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9678#comment:4>
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