#16163: Don’t throw an error (by default) for use of DEPRECATED symbols under -Werror -------------------------------------+------------------------------------- Reporter: m-renaud | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 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): Orthogonal to the `-Werror`-aspect, I strongly support cleaning up the currently conflated `-Wwarnings-deprecations`==`-Wdeprecations` situation. Currently there is no way to suppress `DEPRECATED`-warnings while being informed about `WARNING` pragmas (or vice-versa), nor the ability to promote/demote those individually to/from `-Werror`-severity. To restate it explicitly, my preference would be to end up with the following new situation: - `-Wdeprecations` ''(modified semantics)'' - warn if a module, function, or type marked `DEPRECATED` is imported or used. - `-Wwarnings` ''(new flag)'' - warn if a module, function, or type marked with `WARNING` is imported or used. - `-Wwarnings-deprecations` ''(unchanged semantics)'' - compat/legacy alias for the union `-Wwarnings -Wdeprecations` While retaining the logic as stated in the user's guide:
Warnings and deprecations are not reported for (a) uses within the defining module, (b) defining a method in a class instance, and (c) uses in an export list. The latter reduces spurious complaints within a library in which one module gathers together and re-exports the exports of several others.
-- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16163#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler