[GHC] #106: com. line args not honoured for recompil

[GHC]

#106: com. line args not honoured for recompil
-------------------------+--------------------------------------------------
    Reporter:  nobody    |        Owner:  nobody  
        Type:  bug       |       Status:  reopened
    Priority:  normal    |    Milestone:          
   Component:  Compiler  |      Version:  None    
    Severity:  normal    |   Resolution:          
    Keywords:            |   Difficulty:  Unknown 
          Os:  Unknown   |     Testcase:          
Architecture:  Unknown   |  
-------------------------+--------------------------------------------------
Changes (by simonpj):

  * architecture:  => Unknown
  * resolution:  Wont Fix =>
  * difficulty:  => Unknown
  * testcase:  =>
  * status:  closed => reopened
  * os:  => Unknown

Old description:

> {{{
> I compiled a file with a standard compile and link and some flags,
> include -fallow-overlapping-isntances.  I was interested in
> whether overlapping instances were really required, so I recompiled --
> without modifying the file -- without
> -fallow-overlapping-instances.  I got the "compilation IS NOT required"
> message, clearly erroneous.
>
> Suggestion: flag configuration / compiler state stored in generated code
> and checked on recompile.
>
> My email is nalexander at amavi.com.
>
> Thanks,
> Nick
>
> }}}

New description:

 I compiled a file with a standard compile and link and some flags, include
 `-fallow-overlapping-isntances`.  I was interested in
 whether overlapping instances were really required, so I recompiled --
 without modifying the file -- without
 `-fallow-overlapping-instances`.  I got the "compilation IS NOT required"
 message, clearly erroneous.

 Suggestion: flag configuration / compiler state stored in generated code
 and checked on recompile.

 My email is `nalexander at amavi.com`.

 Thanks,
 Nick

Comment:

 I think this is really a bug; although I'm not quite sure when to fix it.
 It's closely related to #1372.

 Rodrigo Queiro [overdrigzed at gmail.com] cares about this.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/106>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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