[GHC] #14493: Why is g++ necessary to compile GHC?

[GHC]

#14493: Why is g++ necessary to compile GHC?
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Simonpj noted after a system upgrade that GHC failed to build unless `g++`
 is installed. `libffi`'s `configure` otherwise failed with
 {{{
 configure:13086: checking how to run the C++ preprocessor
 configure:13113: gcc -E  conftest.cpp
 gcc: error trying to exec 'cc1plus': execvp: No such file or directory
 }}}

 Why is this necessary?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14493>
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