[GHC] #12651: Test suite should handle stage1 compiler

[GHC]

#12651: Test suite should handle stage1 compiler
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           Reporter:  nomeata        |             Owner:
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  Test Suite     |           Version:  8.0.1
           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:
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 Sometimes it is useful to run the test suite on a stage1 compiler. But
 currently, the output is cluttered by many tests failing due to missing
 support for Template Haskell or interactive use.

 It would be good if the test suite queried the compiler once whether it
 has support for that, and then skips tests that use these features.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12651>
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