[Haskell-cafe] test driving cabal install... cabal install and
normal install (runghc Setup) don't mix... two package.conf files...
sjanssen at cse.unl.edu
Fri May 30 00:29:53 EDT 2008
On Thu, May 29, 2008 at 06:11:04PM -0700, Thomas Hartman wrote:
> After a little drama with zlib, I managed to get cabal-install installed.
> I then attempted to do
> cabal install HAppS-Server
> since this is a module with a lot of dependencies, and in rapid
> development flux, so perenially painful for me to install.
> The result is that I managed to install everything up to HAppS-State,
> which I think is the last dependency, but then seemed to hang
> indefinitely in the middle of installing HAppS-Server at the end.
> OK, I thought, then perhaps I can do normal runghc Setup.hs after
> downloading and unzipping the tar from
> However, this resulted in error
> thartman at thartman-laptop:~/haskellInstalls/smallInstalls/HAppS-Server-0.9.2.1>runghc
> Setup.hs configure
> Setup.hs: At least the following dependencies are missing:
> HAppS-Data >=0.9.2...
> Strange, because I had just installed that module via cabal-install,
> and I could load it in ghci with :m +HappS.Data.
'cabal install' installs packages to your user database by default. However,
'Setup configure' only uses packages from the global database unless the --user
flag is passed.
> I then ran ghc-pkg and got this strange result that my packages were
> broken into two different files. Is this by design?
> ghc-pkg list
> Cabal-22.214.171.124, Cabal-1.3.11, Cabal-1.5.2, DeepArrow-0.2,
> HAppS-Data-0.9.2.1, HAppS-IxSet-0.9.2.1, HAppS-State-0.9.2.1,
Yep, this is by design. The first is a global database that will require root
access to modify. The second is your user database which you can modify
without root access.
> I am curious if anybody else is able to install HAppS-Server using
> cabal install, and whether they can shed any light on the other isuses
> I raised.
I tried building HAppS-server the other day, and had a similar experience. It
seems that HAppS uses some incredibly elaborate TH/typeclass hacks that take
gobs of resources to compile -- my box actually ran out of memory attempting to
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