#910: --make should have a -j flag for parallel building -------------------------------------+------------------------------------- Reporter: igloo | Owner: Type: feature request | Status: closed Priority: normal | Milestone: ⊥ Component: Compiler | Version: 6.4.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: N/A Blocked By: 8184, 8235 | Blocking: Related Tickets: #9221 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rrnewton): For me, typical stack builds spend a huge amount of time bottlenecked on just one or two ghc compiles. Yes, we could push towards stack and other tools dynamically provisioning cores to GHC instances. But, in the short term GHC doesn't actually get decent parallel scaling anyway (#9221) so I really just want `-j2` or `-j3`. And that limited level of oversubscription I'm not very worried about (the overall builds spend so little their time with decent parallel utilization anyway). Do we have a policy for priorities of env vars versus flags in general? I think command line flags should take precedence. Then any smart tools that know how to manage "ghc -j" can override any system wide default. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/910#comment:65 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler