[GHC] #3226: please eliminate error message from Make on every build

[GHC]

#3226: please eliminate error message from Make on every build
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    Reporter:  nr                |        Owner:                  
        Type:  feature request   |       Status:  new             
    Priority:  normal            |    Milestone:                  
   Component:  Build System      |      Version:  6.11            
    Severity:  minor             |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by nr):

  * severity:  trivial => minor

Comment:

 Two comments:

   * Regarding the speed of the build, I think it is really worth exploring
 Glenn Fowler's nmake.  nmake is engineered by real engineers to be
 portable and to work at scale.  It is entirely possible that it might make
 the safe path also fast.  It could even make it possible (although time-
 consuming and tedious) to eliminate the separate 'configure' step.  What
 do you think of this as a possible student project?

   * Having established the safe but slow path, is there a way to make it
 less noisy?  In particular, is there a way to change ghc/ghc.mk so that it
 does ''not'' bleat if the dependency file is missing?  I have upgraded
 severity to 'minor' (from 'trivial') because this error message interrupts
 my workflow in emacs ({{{C-x `}}} now has to stop at an extra error
 message... sometimes).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3226#comment:7>
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