#9174: Haddock fails with "Module defined in multiple files" ----------------------------------+--------------------------------- Reporter: mietek | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: MacOS X Architecture: x86_64 (amd64) | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+--------------------------------- Haddock fails to cooperate with OS X clang CPP: {{{ <no location info>: module ‘pkgid-pkgversion:Main’ is defined in multiple files: dist/build/tmp-#####/Stuff }}} A workaround is to pass `--ghc-options=-optP-P` to `cabal haddock`. This prevents `cabal-install` from being boostrapped, unless `--no-doc` is specified. The original Haddock ticket and the corresponding Cabal issue were both closed as invalid, but there appears to be no GHC ticket to track the underlying cause. http://trac.haskell.org/haddock/ticket/284 https://github.com/haskell/cabal/issues/1740 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9174 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler