#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 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: -------------------------------------+------------------------------------- Building GHC 8.0.2 on macOS 10.13 fails with the following error when building {{{ utils/ghc-pkg/Main.hs:1269:40: error: error: editor placeholder in source file then termText (location db) <#> termText "\n (no packages)\n" ^ }}} I'm not very familiar with Haskell, but it looks to me like the C preprocessor is mistaking `<#>` for an invalid cpp directive instead of Haskell syntax. This is using the Xcode 9 beta (and its associated CLT), which ships "Apple LLVM version 9.0.0 (clang-900.0.22.8)". The same version should be available in the Xcode 9 beta for 10.12, but I haven't tested. The full build logs are available here: https://gist.github.com/anonymous/dc5f0c9d087f5d299f71393805c5d611 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13805 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler