[GHC] #15837: Hadrian should build dynamically linked ghc binary

[GHC]

#15837: Hadrian should build dynamically linked ghc binary
-------------------------------------+-------------------------------------
        Reporter:  davide            |                Owner:  davide
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  8.6.1
  (Hadrian)                          |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5385
       Wiki Page:                    |
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Changes (by alpmestan):

 * differential:   => Phab:D5385


Comment:

 The Cabal PR got merged, and I just pushed
 [https://phabricator.haskell.org/D5385 D5385] which updates the Cabal
 submodule to point to my commit, makes use of `extra-dynamic-library-
 flavours` in `rts.cabal.in` when the `dynamic` flag is passed, and
 arranges for that flag to be passed by Hadrian whenever appropriate.

 Once this lands, we will be done with 1., 2. and 3. from the original
 comment.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15837#comment:7>
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