[GHC] #12971: Paths are encoded incorrectly when invoking GCC

[GHC]

#12971: Paths are encoded incorrectly when invoking GCC
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        Reporter:  erikprantare  |                Owner:
            Type:  bug           |               Status:  new
        Priority:  highest       |            Milestone:  8.2.1
       Component:  Compiler      |              Version:  8.0.1
      Resolution:                |             Keywords:
Operating System:  Windows       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by bgamari):

 Hmm, the missing `ä` above may have just been due to the terminal.
 Redirecting `ghc`'s output to a file and viewing the file with vim shows
 the following,
 {{{
 Linking Hello.exe ...
 *** C Compiler:
 "C:\msys64\home\ben\ghc-8.0.1-i386\lib/../mingw/bin/gcc.exe" "-U__i686" \
     "-march=i686" "-fno-stack-protector" "-DTABLES_NEXT_TO_CODE" "-c" \
     "C:\msys64\home\ben\Pr<84>ntare\ghc4344_0\ghc_4.c" \
     "-o" "C:\msys64\home\ben\Pr<84>ntare\ghc4344_0\ghc_5.o" \
     "-IC:\msys64\home\ben\ghc-8.0.1-i386\lib/include"
 realgcc.exe: error: C:\msys64\home\ben\Präntare\ghc4344_0\ghc_4.c: No
 such file or directory
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12971#comment:6>
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