#14946: GHC Calls CPP for HS with -undef -------------------------------------+------------------------------------- Reporter: Phyx- | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): erikd says,
Phyx-, bgamari-, angerman : the preprocessor should *not* be getting called with `-undef` , but it should be getting called with `-Wcpp-undef` which warns on undefined macros. see 3cb32d8b0b51c5
so adding `-Wcpp-undef` to ghc command line adds `-Wundef` to the CPP command line
That being said, I don't see why this is responsible for the issue that Phyx- is seeing as it adds `-Wundef`, not `-undef` (and indeed the commit looks right). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14946#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler