[GHC] #8374: `tcIfaceGlobal (local): not found` while compiling

[GHC]

#8374: `tcIfaceGlobal (local): not found` while compiling
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        Reporter:  bgamari              |            Owner:  thoughtpolice
            Type:  bug                  |           Status:  new
        Priority:  high                 |        Milestone:
       Component:  Build System         |          Version:  7.7
      Resolution:                       |         Keywords:
Operating System:  Unknown/Multiple     |     Architecture:  arm
 Type of failure:  Building GHC failed  |       Difficulty:  Unknown
       Test Case:                       |       Blocked By:
        Blocking:                       |  Related Tickets:
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Changes (by simonpj):

 * owner:   => thoughtpolice


Comment:

 Just to amplify, the AMP warnings are switched off when
 `-XNoImplicitPrelude` is on, for reasons described in `Note [No AMP
 warning with NoImplicitPrelude]`.  That means that `Control.Applicative`,
 and everything that might be compiled before it (ie that does not depend
 on it) should really be compiled with `-XNoImplicitPrelude`.  But that is
 not the case, and I believe that's what is causing the trouble.

 Once we've verified that this is indeed the source of the trouble (comment
 29) I suppose we can either
  * Do nothing, on the grounds that the entire AMP-warning stuff is going
 away in 7.9, once Applicative is a superclass of Monad.
  * Change the test to be "`-XNoImplicitPrelucde` or part of package
 `base`".
  * Ensure that `base` is compiled with `-fno-warn-amp`.

 The latter is probably the easiest, because it can be done by modifying
 `base.cabal`.  Not a good long term fix, but the whole thing is only
 relevant to 7.8.

 I'm transferring ownership to Austin.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8374#comment:30>
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