#14227: Add -fdefer-ffi-errors flag -------------------------------------+------------------------------------- Reporter: tysonzero | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 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 bgamari):
The easiest solution to the problem seems to me to be a `-fdefer-ffi- errors` flag which replaces any unsupported ffi declaration with a runtime error call that gives a similar error message to the one currently given at compile time.
An interesting idea. I believe this wouldn't be too hard to implement; the relevant code can be found in `TcForeign.checkCConv`.
I would also like a `-fdefer-ffi-errors-no-warn` flag to avoid my tooling complaining / emitting a bunch of warnings that don't actually help me much.
I think I would probably instead spell this `-Wno-deferred-ffi-errors` or similar. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14227#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler