On 2015-01-01 at 14:58:40 +0100, George Colpitts wrote:
I built from source on Mac OS and found the following issues:
[...]
- cabal install cpphs fails: - cabal install cpphs Resolving dependencies... Configuring cpphs-1.13... Building cpphs-1.13... Failed to install cpphs-1.13 Build log ( /Users/gcolpitts/.cabal/logs/cpphs-1.13.log ): Warning: cpphs.cabal: Unknown fields: build-depends (line 5) Fields allowed in this section: name, version, cabal-version, build-type, license, license-file, license-files, copyright, maintainer, stability, homepage, package-url, bug-reports, synopsis, description, category, author, tested-with, data-files, data-dir, extra-source-files, extra-tmp-files, extra-doc-files Configuring cpphs-1.13... Building cpphs-1.13... Preprocessing library cpphs-1.13... - Language/Preprocessor/Cpphs.hs:1:1: Could not find module ‘Prelude’ It is a member of the hidden package ‘base-4.8.0.0’. Perhaps you need to add ‘base’ to the build-depends in your .cabal file. Use -v to see a list of the files searched for.
[...] This is a known issue; cpphs-1.18.6 would actually work with GHC 7.10/base-4.8, but it depends on polyparse, but there isn't yet a polyparse version compatible w/ base-4.8 (due to AMP) on Hackage[1] Otoh, cpphs-1.13 is selected even though Hackage shows that it has a constraint `base <4.8`. However, that's rather a bug in Hackage, as the `.cabal` file is actually invalid, as it has the `build-depends` at the wrong level. So effectively it has no build-depends line at all, so cabal-install is led to believe that it works w/o any build-deps at all.. I did file an issue about that[3] [1]: Coincidentally, I sent Malcolm a AMP-compatibility patch for polyparse just earlier today... [2]: http://hackage.haskell.org/package/cpphs-1.13 [3]: https://github.com/haskell/hackage-server/issues/303