[GHC] #7661: GHC build system does not detect opt-3.0 and friends

[GHC]

#7661: GHC build system does not detect opt-3.0 and friends
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Reporter:  singpolyma           |          Owner:                  
    Type:  feature request      |         Status:  new             
Priority:  normal               |      Component:  Compiler        
 Version:  7.7                  |       Keywords:                  
      Os:  Unknown/Multiple     |   Architecture:  Unknown/Multiple
 Failure:  Building GHC failed  |      Blockedby:                  
Blocking:                       |        Related:                  
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Comment(by thoughtpolice):

 Well, those distributions typically make the GHC package (which you may
 use for a bootstrap compiler) depend specifically on llvm-3.0, for those
 co-existence reasons. And they're patched to specifically invoke those
 versions, just to be extra sure. So out of the box, you're not necessarily
 aware that you need the llvm package, or that it's even there! This is
 very much the case on my ARM/Linux installs (Ubuntu 12.10.) In general I
 just fix this by symlinking appropriately into my $HOME/bin.

 I think you could probably encapsulate most of the hairy machinery in an
 m4 macro to search for 'llc-X.Y' and 'opt-X.Y' variants, after looking for
 non-suffixed versions.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7661#comment:2>
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