[GHC] #8785: Replace hooks API in the RTS with something better

[GHC]

#8785: Replace hooks API in the RTS with something better
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        Reporter:  simonmar          |                   Owner:  simonmar
            Type:  task              |                  Status:  new
        Priority:  high              |               Milestone:  7.12.1
       Component:  Runtime System    |                 Version:  7.6.3
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D8
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Comment (by Simon Marlow <marlowsd@…>):

 In [changeset:"a7ab161602aa0b5833d22c66e64eebb1d9275235/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a7ab161602aa0b5833d22c66e64eebb1d9275235"
 Replace hooks by callbacks in RtsConfig (#8785)

 Summary:
 Hooks rely on static linking semantics, and are broken by -Bsymbolic
 which we need when using dynamic linking.

 Test Plan: Built it

 Reviewers: austin, hvr, tibbe

 Differential Revision: https://phabricator.haskell.org/D8
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8785#comment:2>
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