Re: [GHC] #12567: `ghc --make` recompiles unchanged files when using `-fplugin` OPTIONS

#12567: `ghc --make` recompiles unchanged files when using `-fplugin` OPTIONS -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: plugin, | RecompilationCheck Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #7414 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"1d1e2b77fdc2babdf4fff72b9120c6831e7b422f/ghc" 1d1e2b7/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="1d1e2b77fdc2babdf4fff72b9120c6831e7b422f" Implement "An API for deciding whether plugins should cause recompilation" This patch implements the API proposed as pull request #108 for plugin authors to influence the recompilation checker. It adds a new field to a plugin which computes a `FingerPrint`. This is recorded in interface files and if it changes then we recompile the module. There are also helper functions such as `purePlugin` and `impurePlugin` for constructing plugins which have simple recompilation semantics but in general, an author can compute a hash as they wish. Fixes #12567 and #7414 https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/002 2-plugin-recompilation.rst Reviewers: bgamari, ggreif Reviewed By: bgamari Subscribers: rwbarton, thomie, carter GHC Trac Issues: #7414, #12567 Differential Revision: https://phabricator.haskell.org/D4366 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12567#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler