#13805: GHC 8.0.2 fails to build on macOS 10.13/Xcode 9 - preprocessor error in ghc-pkg -------------------------------------+------------------------------------- Reporter: mistydemeo | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: ghc-pkg | Version: 8.0.2 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 Type of failure: Building GHC | (amd64) failed | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bollu): This was "fixed" for me by installing `gcc` and changing the settings file at `/usr/local/lib/ghc-8.0.2/settings` to: {{{ ... ("Haskell CPP command","gcc"), ("Haskell CPP flags","-E -undef -traditional -Wno-invalid-pp-token -Wno- unicode -Wno-trigraphs"), ... }}} (I replaced `clang` with `gcc`) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13805#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler