#16075: Weverything ignores some OPTIONS_GHC flags -------------------------------------+------------------------------------- Reporter: crockeea | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16075#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#16075: Weverything ignores some OPTIONS_GHC flags -------------------------------------+------------------------------------- Reporter: crockeea | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by bgamari: Old description:

When I enable `-Weverything`, some `OPTIONS_GHC` pragmas are respected, while others are ignored. For example, with `-Weverything`, this file

{{{ main = print "hello"

foo :: (Num a, Show a) => a -> IO () foo = print . show }}}

generates warnings about:

1. missing an export list 2. top-level binding [main] with no type sig 3. redundant constraint [Num a]

If I add `{-# OPTIONS_GHC -fno-warn-missing-signatures -fno-warn-missing- export-lists -fno-warn-redundant-constraints #-}` to the top of the file and recompile, I expect all warnings to go away. But GHC still reports that `main` has no signature.

Note that this problem doesn't occur with `-Wall`. With `-Wall`, the code snippet warns about the missing signature on `main`, but when I add the `OPTIONS_GHC`, the warning goes away. Thus this problem appears to be unique to `Weverything`.

New description: When I enable `-Weverything`, some `OPTIONS_GHC` pragmas are respected, while others are ignored. For example, with `-Weverything`, this file {{{ main = print "hello" foo :: (Num a, Show a) => a -> IO () foo = print . show }}} generates warnings about: 1. missing an export list 2. top-level binding [main] with no type sig 3. redundant constraint [Num a] If I add `{-# OPTIONS_GHC -fno-warn-missing-signatures -fno-warn-missing- export-lists -fno-warn-redundant-constraints #-}` to the top of the file and recompile, I expect all warnings to go away. But GHC still reports that `main` has no signature. Note that this problem doesn't occur with `-Wall`. With `-Wall`, the code snippet warns about the missing signature on `main`, but when I add the `OPTIONS_GHC`, the warning goes away. Thus this problem appears to be unique to `Weverything`. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16075#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler