CPP Help (was Re: Latest Template Haskell Breaks Package)

Francesco Mazzoli f at mazzo.li
Wed Dec 24 09:50:56 UTC 2014

You can specify the pre-processor in the `ghc-options' field in the
cabal file, e.g.

    ghc-options: -pgmPcpphs


On 23 December 2014 at 17:14, Brandon Allbery <allbery.b at gmail.com> wrote:
> On Tue, Dec 23, 2014 at 11:10 AM, Dominic Steinitz <dominic at steinitz.org>
> wrote:
>> How very clever of you and thank you very much. Changing ‘ to 1 does fix
>> the problem.
>> I would have thought this would work
>> cabal install --with-gcc=gcc-4.9
>> But sadly I still got the same error.
> I think that changes the gcc cabal uses to compile C code, but does not
> affect how ghc invokes cpp. Or put otherwise, there are too many ways that a
> C compiler can be dragged into the build pipeline (building C code
> explicitly [via cabal or via ghc foo.c, two different cases], wrapped FFI
> calls in ghc, -fvia-C, CPP, ...).
> --
> brandon s allbery kf8nh                               sine nomine associates
> allbery.b at gmail.com                                  ballbery at sinenomine.net
> unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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