[GHC] #8400: Migrate the RTS to use libuv (or libev, or libevent)

[GHC]

#8400: Migrate the RTS to use libuv (or libev, or libevent)
-------------------------------------+-------------------------------------
        Reporter:  schyler           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  635, 7353         |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 I don't know what Jaffacake's opinion on this is but I'm not terribly keen
 on picking up a `libuv` dependency. We currently have very few native
 dependencies and I think that's a good thing; native dependencies are
 bound to either increase the complexity of the build system (if we
 statically link) or dramatically complicate distribution (if we
 dynamically link). If we could make the `libuv` backend optional and keep
 the existing codepath then maybe I can see us merge this, but otherwise it
 seems like we should simply try to optimize what we have rather than throw
 the whole thing away. I strongly suspect there is some very low-hanging
 fruit in mio.

 I'm willing to be convinced otherwise though.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8400#comment:18>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler