[Hackage] #947: let "cabal -fSomeFlag" produce error for undeclared flags

[Hackage]

#947: let "cabal -fSomeFlag" produce error for undeclared flags
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  Reporter:  Oblosys             |        Owner:                      
      Type:  enhancement         |       Status:  new                 
  Priority:  normal              |    Milestone:  cabal-install-0.14.2
 Component:  cabal-install tool  |      Version:  1.14.0              
  Severity:  normal              |     Keywords:                      
Difficulty:  unknown             |   Ghcversion:                      
  Platform:                      |  
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Changes (by kosmikus):

  * version:  1.10.2.0 => 1.14.0
  * milestone:  => cabal-install-0.14.2


Comment:

 There are a few things to keep in mind:

    * Flag constraints can be given for arbitrary packages, not just for
 targets.
    * It multiple targets are specified, -f flags apply to all targets.
    * Not every version of a package declares the same flags.

 So whatever we end up doing: a warning might be ok, an error almost
 certainly isn't. Even a warning has to be designed carefully so that it
 isn't just perceived as noise.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/947#comment:2>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects