[GHC] #14712: After git pull make can't work without make clean

[GHC]

#14712: After git pull make can't work without make clean
-------------------------------------+-------------------------------------
        Reporter:  jiamo             |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Build System      |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  MacOS X           |         Architecture:  x86_64
 Type of failure:  Building GHC      |  (amd64)
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * type:  bug => feature request


Comment:

 Indeed Hadrian may be a bit better in this regard although I don't believe
 it's much different at the moment. Ultimately we will need to do something
 like https://github.com/snowleopard/hadrian/issues/416 to improve things
 significantly.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14712#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler