On Jun 1, 2006, at 6:36 AM, Brian Hulley wrote:
Hi - I've just downloaded and installed Edison using Cabal.
How did that go for you? You appear to have had some success ;-) I ask because 1.2rc4 has a new build system and I'm interested in your experience. Also, have you tried running the test suite?
However I now see that Edison seems to have been already installed with the ghc 6.4.2 installation, even though there's no mention of Edison in /doc/html/libraries/index.html, because there are old Edison .hi files in
ghc-6.4.2/hslibs-imports/data
whereas the Cabal install process copied newly built Edison files to C:\Program Files\Haskell\EdisonAPI-1.2\ghc-6.4.2\Data and C:\Program Files\Haskell\EdisonCore-1.2\ghc-6.4.2\Data
I was about to just delete the old .hi files from the hslibs- imports/data directory, but then I noticed there are a few .hi files there for Set and FiniteMap, even though there are also .hi files (though of different sizes) for Set and FiniteMap stored in the imports/data directory as well.
So my question is: how to understand all this? Why are there different copies of Set.hi which have different sizes, but in the same installation, and which one does ghc use when I use import Data.Set in a program?
Simon already touched on this, but let me be a little more explicit: GHC < 5.04 included a version of the Edison library in its standard libraries. At the time it was not being maintained and when GHC moved to the hierarchical libraries, Edison was not included. Thus, the old standard libraries include Edison (version 1.0 I believe) in a flat namespace and the new standard libraries do not include Edison. I have recently undertaken the maintenance of Edison. All Edison packages I have released have the Edison modules under "Data.Edison.*" in the module hierarchy and should not clash with older Edison versions. Also, Edison does not provide the "Data.Set" or "Data.Map" modules. It does, however, provide light wrappers for them which allows you to use Data.Set and Data.Map via the Edison API. These wrappers are Data.Edison.Coll.StandardSet and Data.Edison.Assoc.StandardMap. I hope that clears up any confusion. BTW, I'll be releasing Edison 1.2 final very soon now (probably this weekend, when I can steal a few moments to roll the tarballs).
Also, what does .p_hi mean? (The new build of Edison only creates .hi files not .p_hi files but all the ghc-6.4.2 modules have both .hi and .p_hi files)
(It would also be interesting to know where Cabal gets the information from to configure a package, and where the package database is stored...)
Thanks, Brian.
Rob Dockins Speak softly and drive a Sherman tank. Laugh hard; it's a long way to the bank. -- TMBG