[GHC] #859: Highly misleading missing-package error message

[GHC]

#859: Highly misleading missing-package error message
-----------------------+----------------------------------------------------
  Reporter:  simonpj   |          Owner:         
      Type:  bug       |         Status:  closed 
  Priority:  normal    |      Milestone:         
 Component:  Compiler  |        Version:  6.4.2  
  Severity:  normal    |     Resolution:  fixed  
  Keywords:            |             Os:  Unknown
Difficulty:  Unknown   |   Architecture:  Unknown
-----------------------+----------------------------------------------------
Changes (by simonmar):

  * resolution:  => fixed
  * status:  new => closed

Comment:

 I've fixed this:

  * error messages about missing packages now state if the missing
    package is a dependency of some other package.

  * the build system will now fail rather than register a package with
    missing dependencies.

  * packages with missing dependencies are now not simply dropped from
    the package database in GHC unless they depend on a package that
    was explicitly ignored with -ignore-package.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/859>
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