[GHC] #7032: sleep fails for compiled program

[GHC]

#7032: sleep fails for compiled program
-------------------------------+--------------------------------------------
    Reporter:  carl            |       Owner:                             
        Type:  bug             |      Status:  new                        
    Priority:  normal          |   Milestone:  7.6.1                      
   Component:  Compiler        |     Version:  7.4.2                      
    Keywords:                  |          Os:  Linux                      
Architecture:  x86_64 (amd64)  |     Failure:  Incorrect result at runtime
  Difficulty:  Unknown         |    Testcase:                             
   Blockedby:                  |    Blocking:                             
     Related:                  |  
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Comment(by pcapriotti):

 According to the man page of `sleep`:

 {{{
 sleep() makes the calling thread sleep until seconds seconds have elapsed
 or a signal arrives which is not ignored.
 }}}

 Since we use `SIGVTALRM` for the RTS clock, `sleep` is always going to be
 interrupted immediately. Normally, you should use `threadDelay`, which
 will also let other threads run (even without `-threaded`).

 The attached patch explains this problem in the documentation for `sleep`,
 and adds a `WARNING` pragma.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7032#comment:4>
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