Just a word of warning from a library maintainer's point of view: Including new flags into `-Wall` puts some non-trivial burden onto
#10635: -fwarn-redundant-constraints should not be part of -Wall -------------------------------------+------------------------------------- Reporter: Lemming | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.11 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: #9939, #9973, | Differential Rev(s): #10100, #10183, #11370 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by Lemming): Replying to [comment:29 svenpanne]: maintainers wanting a warning-free build. Simply adding a new pragma is not enough: Old GHCs don't know that pragma, so you have to put that into some ugly `#ifdef`s, which in turn oftern implies adding another (language) pragma to allow the preprocessor plus perhaps some changes in the `.cabal` file. I don't like CPP and would prefer that GHC gets a switch to disable warnings about certain pragmas. This was proposed in #2867. It should be possible to disable those warnings globally in the Cabal file. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10635#comment:30 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler