[GHC] #14724: ghc-8.2.2 configure script fail to extract gcc version correctly

[GHC]

#14724: ghc-8.2.2 configure script fail to extract gcc version correctly
-------------------------------------+-------------------------------------
           Reporter:  hyophyop       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.2
           Keywords:                 |  Operating System:  MacOS X
       Architecture:  x86_64         |   Type of failure:  Installing GHC
  (amd64)                            |  failed
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 In GHC's configure script, there's a variable $fp_cv_gcc_version which
 contains gcc version by running one-line bash code.
 {{{
     fp_cv_gcc_version="`$CC -v 2>&1 | grep 'version ' | sed -e
 's/.*version [^0-9]*\([0-9.]*\).*/\1/g'`"
 }}}

 Following is gcc version info of my system.

 {{{
 Apple LLVM version 9.0.0 (clang-900.0.39.2)
 Target: x86_64-apple-darwin17.4.0
 Thread model: posix
 InstalledDir: /Library/Developer/CommandLineTools/usr/bin
 Found CUDA installation: /usr/local/cuda, version 7.5
 }}}

 Expected value of fp_cv_gcc_version is 9.0.0.
 But CUDA version is extracted unexpectedly and attached to version info
 resulting buggy `mk/config.mk` like following.
 {{{

 GccVersion            = 9.0.0
 7.5
 ifeq "$(phase)" "0"
 CrossCompilePrefix    =
 ...
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14724>
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