#15890: Provide a way for hadrian users to always pass some options to hadrian itself -------------------------------------+------------------------------------- Reporter: alpmestan | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.8.1 Component: Build System | Version: 8.7 (Hadrian) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by snowleopard): I think we can already almost do this, have a look at this section in the docs: https://github.com/ghc/ghc/blob/master/hadrian/doc/user-settings.md #command-line-arguments For example, it's possible to add the following to `UserSetting.hs`: {{{#!haskell ryanFlavour :: Flavour ryanFlavour = performanceFlavour -- Note that we inherit all performanceFlavour settings { name = "ryan" , args = args performanceFlavour <> ryanArgs -- Further tweaks to Args , integerLibrary = pure integerSimple } ryanArgs :: Args ryanArgs = builder Ghc ? input "//Prelude.hs"? pure ["-ddump-simpl", "-ddump-to-file"] }}} And then invoke Hadrian with `--flavour=ryan` flag. There are several further improvements: * Make it possible to override the default flavour, so that it's not necessary to pass `--flavour=ryan`. * Add a new setting `buildThreads` to `Flavour`, so that one could set `buildThreads = 4` as part of the user flavour, instead of setting it separately via command line. * Similarly, add the build root setting to `Flavour` to support `buildRoot = "ghc-prof-build"`, which can still be overriden from the command line if need be. Alp, Ryan: Does this sound like the right thing to do? I'm happy to implement. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15890#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler