[GHC] #7519: CLK_TCK is not always a constant

[GHC]

#7519: CLK_TCK is not always a constant
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    Reporter:  singpolyma        |       Owner:                     
        Type:  bug               |      Status:  patch              
    Priority:  normal            |   Milestone:                     
   Component:  libraries/base    |     Version:  7.7                
    Keywords:  qnx               |          Os:  Other              
Architecture:  Unknown/Multiple  |     Failure:  Building GHC failed
  Difficulty:  Unknown           |    Testcase:                     
   Blockedby:                    |    Blocking:                     
     Related:                    |  
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Changes (by PHO):

 * cc: pho@… (added)


Comment:

 NetBSD does that too.
 In `/usr/include/time.h`:
 {{{
 /*
  * CLK_TCK uses libc's internal __sysconf() to retrieve the machine's
  * HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not
  * need to include unistd.h
  */
 long __sysconf(int);
 #define CLK_TCK         (__sysconf(39))
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7519#comment:6>
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