#12858: clock_gettime support on OS X is a nightmare ----------------------------------------+--------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1 Keywords: | Operating System: MacOS X Architecture: Unknown/Multiple | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: ----------------------------------------+--------------------------------- Darwin did not support `clock_gettime` until Sierra, which added it. Unfortunately, the existing `MACOSX_DEPLOYMENT_TARGET` environment variable has no effect on its availability, so binary distributions compiled on Sierra will be incompatible with older releases. We have three options for dealing with this, 1. Disable `clock_gettime` support in our OS X binary distributions (e.g. `./configure ac_cv_func_clock_gettime=no`) 2. Produce one binary distribution for Sierra and another for previous releases 3. Making it possible to change timer backends at runtime. At the moment I'm leaning towards (1). (2) is another possibility. (3) seems like a road to madness. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12858 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler