#10360: GHC ignores command-line options if *.o and *.hi files exist -------------------------------------+------------------------------------- Reporter: asr | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- For example, given the module {{{#!hs module Test where foo = putStrLn "Hello World" }}} if I compile using the command {{{ ghc -c Test.hs }}} and then I compile adding the `-Wall` flag {{{ ghc -c -Wall Test.hs }}} I would expect the warning {{{ Test.hs:3:1: Warning: Top-level binding with no type signature: foo :: IO () }}} but GHC produces the message {{{ compilation IS NOT required }}} That is, the `-Wall` flag was ignored because the `Test.o` and `Test.hi` exist. (I couldn't reproduce this behaviour using gcc version 4.6.3.) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10360 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler