[Hackage] #720: Executables fail on windows if the executable name has a dot in it

[Hackage]

#720: Executables fail on windows if the executable name has a dot in it
----------------------------+-----------------------------------------------
  Reporter:  j3h            |        Owner:     
      Type:  defect         |       Status:  new
  Priority:  normal         |    Milestone:     
 Component:  Cabal library  |      Version:     
  Severity:  normal         |     Keywords:     
Difficulty:  unknown        |   Ghcversion:     
  Platform:                 |  
----------------------------+-----------------------------------------------

Comment(by duncan):

 Currently the code does:

 {{{
   -- exeNameReal, the name that GHC really uses (with .exe on Windows)
   let exeNameReal = exeName' <.>
                     (if null $ takeExtension exeName' then exeExtension
 else "")
 }}}

 Where as I would expect it should be simply

 {{{
   -- exeNameReal, the name that GHC really uses (with .exe on Windows)
   let exeNameReal = exeName' <.> exeExtension
 }}}

 since `p <.> "" = p`.

 It is not clear to me why the code is like it is now. The code was added
 by the patch
 {{{
 Mon Aug 21 15:30:21 BST 2006  Neil Mitchell
   * Make -o use the filename as GHC will, i.e. with .exe on the end for
 Windows.
  This fixes a GHC 6.4.2 bug with relinking every time.
 }}}
 the code was
 {{{
   -- exeNameReal, the name that GHC really uses (with .exe on Windows)
   let exeNameReal = exeName' `joinFileExt`
                     (if null $ snd $ splitFileExt exeName' then
 exeExtension else "")
 }}}
 Previously it had relied on ghc adding the .exe extension. It is still not
 obvious why it is coded the way it is, if it's an oversight or something
 I'm missing. In principle the above allows people to make an executable
 that does not use the .exe extension.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/720#comment:2>
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