Right I am just trying to rebuild the unix package. No matter what version is present in the unix.cabal file,
runhaskell Setup.hs configure
produces an error concerning unix-2.3.0.0
Starting to get really frustrated over this. I just want to build a Unix package test case .. and now I can't even build the unix package itself.
ghc-pkg seems to be at the center of this problem because the problem seems to have to deal with the package database.
1) On Linux(Ubuntu) where is the package database?
2) If ghc-pkg is indeed a Haskell program, how can I get the source to better understand the problem I am encountering on my own?
On Fri, Apr 11, 2008 at 9:33 AM, Brent Yorgey <
byorgey@gmail.com> wrote:
On Fri, Apr 11, 2008 at 3:11 AM, Ketil Malde <
ketil@malde.org> wrote:
"Galchin, Vasili" <vigalchin@gmail.com> writes:
>> ghci
> :m System.Posix
>
> I am getting the wrong version of the Unix package. I know this to be true
> because I did
> ghc-pkg latest unix
>
> and got unix-2.3.0.0
>
> I want unix.2.2.0.0 because this version has changes that I made
Naturally, you'll get 2.3.0.0, since it has the highest version number!
Either rename your modified version to 2.4 (or similar), specify the
exact version in your *application's* cabal file, or use
"ghc-pkg hide" to hide version 2.3.0.0 from view.
Actually, I'm pretty sure that Cabal does not take the visibility states of packages into account when selecting packages to fulfill dependencies, so ghc-pkg hide will not actually work.
-Brent