[GHC] #10449: Out-of-tree tests broken on MinGW + native Python due to quoting of config.compiler

[GHC]

#10449: Out-of-tree tests broken on MinGW + native Python due to quoting of
config.compiler
-------------------------------+-------------------------------------------
        Reporter:  Rufflewind  |                   Owner:
            Type:  bug         |                  Status:  patch
        Priority:  normal      |               Milestone:  7.12.1
       Component:  Test Suite  |                 Version:  7.10.1
      Resolution:              |                Keywords:
Operating System:  Windows     |            Architecture:  Unknown/Multiple
 Type of failure:  Other       |               Test Case:
      Blocked By:              |                Blocking:
 Related Tickets:  #10441      |  Differential Revisions:  Phab:D911
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Comment (by Rufflewind):

 Unfortunately, the `wrap` call still breaks the magic.  The conversion
 seems to be documented here:
 http://www.mingw.org/wiki/Posix_path_conversion

 What is the reason for quoting `compiler.config`?  A quick grep shows the
 following code use `compiler.config`:

 {{{
 ./testsuite/config/ghc:config.compiler              = 'ghc'
 ./testsuite/config/ghc:    h = os.popen(config.compiler + ' --info', 'r')
 ./testsuite/config/ghc:    h = os.popen(config.compiler + ' +RTS --info',
 'r')
 ./testsuite/mk/test.mk: -e 'config.compiler=$(call quote_path,$(TEST_HC))'
 \
 ./testsuite/driver/testglobals.py:        self.compiler = ''
 ./testsuite/driver/runtests.py:    # testframe -e
 'config.compiler=ghc-5.04'
 }}}

 There might be others I've missed, but I think in many situations the
 quotes will either get stripped anyway, or can be rewritten using
 `subprocess` so as to avoid the need for them.  If quotes are necessary,
 they could be just added at those specific places.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10449#comment:9>
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