Duncan et al
A few times recently I've tripped badly over this:
* Cabal complains of missing dependencies
* But the "missing" package is definitely installed
Example below.
The reason is: the "missing" package is installed for this user, but I didn't
say "--user" when saying "setup configure".
Confusingly, saying "cabal configure" works fine. But "cabal configure
--global " fails with the missing dependency.
So there are two infelicities, which combined to leave me stumped:
1. "setup configure" and "cabal configure" use different defaults. The former
defaults to "--global" while the latter defaults to "--user". I suggest both
default to --user.
2. The missing-package error message does not mention that it's looking only in
the global packages. When (but only when) looking in the global packages only,
the error should say:
Setup: At least the following dependencies are missing:
primitive ==0.3.*
NB: setup is looking only in the globally-installed packages.
If you want to include your per-user installed packages, use --user
As a refinement, only suggest --user if that would actually resolve the problem.
Simon
=============
bash-3.2$ ./Setup configure --with-ghc=$head2
Configuring vector-0.6...
Setup: At least the following dependencies are missing:
primitive ==0.3.*
bash-3.2$ ghc-pkg list
...blah...
/home/simonpj/.ghc/x86_64-linux-6.13/package.conf.d:
monads-tf-0.1.0.0
{parsec-3.0.0}
primitive-0.3
transformers-0.2.1.0
vector-0.6
bash-3.2$
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