#7660: warning: conflicting types when compiling via-C -------------------------------------+------------------------------------- Reporter: singpolyma | Owner: hvr Type: bug | Status: patch Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.7 Resolution: | Keywords: warning Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1506 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"192dd068890701a7692890677d4cbf9f2abdb64a/ghc" 192dd068/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="192dd068890701a7692890677d4cbf9f2abdb64a" Suppress conflicting types for builtins warnings GCC 4.0 and later warn about type-conflicting prototypes for built-in functions such as `strlen`. This is a problem for the via-c backend as it generates code such as typedef void *(*(*StgFunPtr)(void))(void); extern StgFunPtr strlen(); However, by using the `-fno-builtin` flag, GCC is told not to try to auto-detect such built-in functions and instead treat them as ordinary external functions. This also suppresses this warning. This address #7660 Test Plan: IIAM Reviewers: bgamari, austin Reviewed By: austin Subscribers: thomie, erikd Differential Revision: https://phabricator.haskell.org/D1506 GHC Trac Issues: #7660 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7660#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler