[GHC] #8943: Add System.Process.createPipe

[GHC]

#8943: Add System.Process.createPipe
--------------------------------------+------------------------------------
        Reporter:  tibbe              |            Owner:
            Type:  feature request    |           Status:  patch
        Priority:  normal             |        Milestone:  7.10.1
       Component:  libraries/process  |          Version:  7.6.3
      Resolution:                     |         Keywords:
Operating System:  Unknown/Multiple   |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown       |       Difficulty:  Unknown
       Test Case:                     |       Blocked By:
        Blocking:                     |  Related Tickets:
--------------------------------------+------------------------------------

Comment (by refold):

 I get the following error on Windows:

 {{{
 [2 of 3] Compiling System.Process   ( System\Process.hs,
 dist\build\System\Proce
 ss.o )

 C:\program files (x86)\haskell
 platform\2013.2.0.0\mingw\bin\..\lib\gcc\mingw32\
 4.5.2\..\..\..\..\include\io.h:64:1:
     parse error on input `{'
 }}}

 After renaming `System\Process.hs` to `.hsc` I get:

 {{{
 [2 of 3] Compiling System.Process   ( dist\build\System\Process.hs,
 dist\build\S
 ystem\Process.o )

 SystemProcess.hsc:921:18:
     Ambiguous occurrence `fdToHandle'
     It could refer to either `System.Process.fdToHandle',
                              defined at SystemProcess.hsc:926:1
                           or `System.Process.Internals.fdToHandle',
                              imported from `System.Process.Internals' at
 SystemP
 rocess.hsc:69:1-31
                              (and originally defined in
 `GHC.IO.Handle.FD')

 SystemProcess.hsc:922:19:
     Ambiguous occurrence `fdToHandle'
     It could refer to either `System.Process.fdToHandle',
                              defined at SystemProcess.hsc:926:1
                           or `System.Process.Internals.fdToHandle',
                              imported from `System.Process.Internals' at
 SystemP
 rocess.hsc:69:1-31
                              (and originally defined in
 `GHC.IO.Handle.FD')
 }}}

 After removing the `fdToHandle` function and fixing the call sites
 everything compiles fine, modulo warnings.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8943#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler