[GHC] #7143: ghc-7.6.0.20120810-x86_64-windows.exe -> ghc can't figure out LLVM version

[GHC]

#7143: ghc-7.6.0.20120810-x86_64-windows.exe -> ghc can't figure out LLVM version
-------------------------------------+-------------------------------------
              Reporter:  cetinsert   |            Owner:  Fanael
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:  7.8.4
             Component:  Compiler    |          Version:  7.6.1-rc1
  (LLVM)                             |         Keywords:  llvm
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:  Windows     |       Difficulty:  Unknown
       Type of failure:  Incorrect   |       Blocked By:
  warning at compile-time            |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D190   |
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"918719b936b878ab660f20ceef8afc9e3a898c5a/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="918719b936b878ab660f20ceef8afc9e3a898c5a"
 Set llc and opt commands on all platforms

 Summary:
 LLVM llc and opt commands should be set on all platforms, including
 Windows. If they're not, GHC tries to execute an unnamed executable,
 resulting in error messages such as:

     Error (figuring out LLVM version): : runInteractiveProcess: invalid
 argument (Invalid argument)
     <no location info>:
         Warning: Couldn't figure out LLVM version!
                  Make sure you have installed LLVM

 This regression was introduced in e6bfc596.

 Test Plan: Build GHC and test if --info shows sensible values of "LLVM llc
 command" and "LLVM opt command"

 Reviewers: austin, #ghc

 Reviewed By: austin, #ghc

 Subscribers: austin

 Projects: #ghc

 Differential Revision: https://phabricator.haskell.org/D190

 GHC Trac Issues: #7143
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7143#comment:22>
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