[Haskell-cafe] C2HS issues on Hackage

Duncan Coutts duncan.coutts at worc.ox.ac.uk
Mon Aug 10 18:19:31 EDT 2009

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.


More information about the Haskell-Cafe mailing list