[GHC] #9287: changed dependency generation

[GHC]

#9287: changed dependency generation
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              Reporter:  maeder      |            Owner:
                  Type:  task        |           Status:  new
              Priority:  normal      |        Milestone:
             Component:              |          Version:  7.8.2
  Documentation                      |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  Documentation bug                  |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by simonmar):

 Indeed, when bootstrapping with 7.6.3, the dependency files in a GHC build
 have unnecessary entries due to `-dep-suffix ""`:

 {{{
 # DO NOT DELETE: Beginning of Haskell dependencies
 utils/hsc2hs/dist/build/HSCParser.o utils/hsc2hs/dist/build/HSCParser._o :
 utils/hsc2hs/HSCParser.hs
 $(eval $(call hi-rule,utils/hsc2hs/dist/build/HSCParser.hi
 utils/hsc2hs/dist/build/HSCParser._hi  : %hi: %o
 utils/hsc2hs/HSCParser.hs))
 utils/hsc2hs/dist/build/HSCParser.o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Prelude.hi
 utils/hsc2hs/dist/build/HSCParser._o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Prelude._hi
 utils/hsc2hs/dist/build/HSCParser.o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Data/Char.hi
 utils/hsc2hs/dist/build/HSCParser._o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Data/Char._hi
 utils/hsc2hs/dist/build/HSCParser.o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Control/Monad.hi
 utils/hsc2hs/dist/build/HSCParser._o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Control/Monad._hi
 utils/hsc2hs/dist/build/HSCParser.o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Control/Applicative.hi
 utils/hsc2hs/dist/build/HSCParser._o :
 /home/smarlow/local/lib/ghc-7.6.3/base-4.6.0.1/Control/Applicative._hi
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9287#comment:1>
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