#13899: Improve [-Wmissing-home-modules] error message -------------------------------------+------------------------------------- Reporter: alanz | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.2.1-rc2 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 hvr): As `-Wmissing-home-modules` is a generic warning message we may want to avoid mentioning `other-extensions` unless we're actually building via Cabal. So here's an example from `GhcMake.hs` which changes the compiler message based on the presence of the `-fcabal-building-package` flag: {{{#!hs in throwOneError $ mkPlainErrMsg dflags' mod_loc $ text "Unexpected signature:" <+> quotes (ppr mod_name) $$ if gopt Opt_BuildingCabalPackage dflags then parens (text "Try adding" <+> quotes (ppr mod_name) <+> text "to the" <+> quotes (text "signatures") <+> text "field in your Cabal file.") else parens (text "Try passing -instantiated-with=\"" <> suggested_instantiated_with <> text "\"" $$ text "replacing <" <> ppr mod_name <> text "> as necessary.") }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13899#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler