[GHC] #8921: ghc-stage2 fails with ld: fatal: library -lrt: not found on topHandler02(profthreaded) test

[GHC]

#8921: ghc-stage2 fails with ld: fatal: library -lrt: not found on
topHandler02(profthreaded) test
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        Reporter:  AlainODea         |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.1-rc2
      Resolution:                    |         Keywords:
Operating System:  Solaris           |     Architecture:  x86_64 (amd64)
 Type of failure:  Compile-time      |       Difficulty:  Easy (less than 1
  crash                              |  hour)
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by AlainODea):

 This line needs to be removed:
 https://github.com/ghc/ghc/blob/master/compiler/main/DynFlags.hs#L1216

 It will break -profthreaded on all Solaris and Illumos OSes released since
 2006.

 It leads to a paradox where gcc is handed -r (relocatable) and -lrt (link
 librt) which combined requires librt.a which doesn't and won't ever exist
 on any Solaris or Illumos system.

 I'll provide a patch once I've done some more testing.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8921#comment:3>
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