[GHC] #8792: Mac OS X does not supply lllvm i.e. opt and llc

[GHC]

#8792: Mac OS X does not supply lllvm i.e. opt and llc
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        Reporter:  George            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Documentation     |          Version:  7.8.1-rc1
      Resolution:                    |         Keywords:
Operating System:  MacOS X           |     Architecture:  Unknown/Multiple
 Type of failure:  Documentation     |       Difficulty:  Easy (less than 1
  bug                                |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by carter):

 so we should more clearly say "clang is provided on recent OS X, but to
 use the LLVM backend, you will need to install LLVM, such as by having the
 homebrew package manager and invoking {{{ brew install llvm }}}"

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8792#comment:9>
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