You are right, I hit "reply" without checking the destination. Thanks for your answer. Arnaud On Sat, Apr 24, 2010 at 3:24 PM, Ivan Lazar Miljenovic wrote:

First of all, did you mean to reply back to -cafe as well?

Arnaud Bailly writes:

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I was not precise enough: Yes, I found the examples to have both a library and an executable clear enough that I managed to have something workable. But I found somewhat surprisingly that the modules used in both the library and the executable were compiled twice. I was expecting the executable to link to the dynamic library produced. I understand from your answer this is a known issue.

Right; with Cabal 1.8 this situation is "solved", but at the expense of not being able to build documentation (I think I was the first person to fully try this, which is why the bug went unnoticed until recently; the darcs people are considering using it as well but they didn't test building haddock docs).

So yeah, at the moment you're stuck with building the library multiple times :s

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On Sat, Apr 24, 2010 at 12:14 PM, Ivan Lazar Miljenovic wrote:

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Arnaud Bailly writes:

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Not sure this question is totally on-topic.

Sure is.

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Please point me in the right direction if it is not. I would like to make a cabal package containing both an executable and several libraries,

Each cabal package can contain only one library (which is why gtk2hs is only now starting to be cabalised).

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and link the main executable to the libraries produced in the build. It is not clear how I can achieve that from the documentation. I tried Extra-libraries option but it does not work.

By default, you don't need to do anything extra to have executables using a library in the same package (assuming they have the same source directory) as GHC will find all the modules it needs.

Cabal-1.8 has a new feature that lets executables explicitly depend upon the libraries, which means the library doesn't need to get rebuilt several times.  However, this is causing problems with building haddock documentation: http://hackage.haskell.org/trac/hackage/ticket/656

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com