[Haskell-cafe] C2HS issues on Hackage

Michael Snoyman michael at snoyman.com
Tue Aug 11 02:03:12 EDT 2009

On Tue, Aug 11, 2009 at 1:19 AM, Duncan Coutts
<duncan.coutts at worc.ox.ac.uk>wrote:

> On Tue, 2009-08-04 at 07:07 +0300, Michael Snoyman wrote:
> > Hi all,
> >
> > I've written a Yaml library built on top of libyaml (the same C
> > library at the core of Python's yaml library). All is well on my local
> > system and my server; I'm currently using it in production. However,
> > the build is failing on Hackage with the following build log:
> >
> http://hackage.haskell.org/packages/archive/yaml/0.0.1/logs/failure/ghc-6.10
> .
> >
> > It seems that whichever version of C2HS is installed on the server
> > does not allow "type" (or perhaps other keywords?) to be used as C
> > identifiers. Unfortunately, "type" is the name of a field in a C
> > struct I need to integrate with. It's obviously not vital that I get
> > it to compile on hackage, but 1) I'm worried this is a sign of a
> > bigger problem, and 2) it's always nice to have the API documentation
> > available online.
> >
> > Any suggestions?
> I recommend that you specify in the .cabal file the minimum version of
> c2hs that you require. It's probably 0.16 that you need.
> Then of course you'll probably find that the version of c2hs on the
> single build machine is indeed older than that. This shows us again the
> problem with using a single build machine rather than allowing any
> client to upload build reports. As an interim measure before we get the
> new hackage server, you could email Ross and ask him nicely to update
> c2hs on the build machine.
> Duncan

Thanks for getting back to me Duncan. I was in fact using 0.16 on my system.
However, to simplify things, I went ahead and rewrote to use the FFI

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