It does not work as intended and gives inconsistent results between
cabal install and cabal configure. The problem with the approach was
that we were filtering out the dependencies of non-buildable components
at the end. But that does not help much since if one of the deps of
the non-buildable component were not available then we would have
failed earlier with a constraint failure. A proper solution would have
to tackle it from the beginning, not just as a filter at the end.
The meaning of build-depends and buildable: False needs more thought.

It's been deprecated since Cabal 1.1.4 (over 3 years).
The replacement since then has been --destdir=

In the case that the progsdir is not relative to the $prefix

So we can stop pretending that "main-is: foo.hs" is a module name.
Also allows us to deprecate ModuleName.simple which bypasses the
ModuleName type invariant.

Now this like "#if !MIN_VERSION_base(4,2,0)" will work

This is slightly experimental, we'll see how it goes. See ticket #466.

No longer returns Maybe, we can find installed packages for all
the compilers we support (and this feature is a requirement for
support for new compilers).
This is an API change so cannot merge to Cabal-1.8.x branch.

That is, work out which packages are installed for hugs and nhc98.
In both cases there is special support for the core packages.
In future both should use the standard method when they supply
proper installed package info files for the bundled libraries.

This is really hard and rather nasty.

Also improve the error message somewhat

Useless docbook tools.

Important for the case of registering inplace when we're using a
specific package db, e.g. when doing isolated builds.

In particular the one about -prof since this leads to borked packages.

This is a rerecord of
    Stephen Blackheath <oversensitive.pastors.stephen@blacksapphire.com>**20091001053101
to avoid conflicts.

When collecting the output from programs.

Fixes GHC trac #3682. Patch from juhpetersen.

The 1.8.x branch remains at 1.8.0.1

As is the output from ghc-pkg dump.

Can be either locale text or specifically UTF8.
Also tidy up the rawSystemStd* variants and pass
a text/binary mode flag for the input and output.

Do it in the pretty-printing rather than just before writing the file.

Break a couple fewer package's Setup.hs files

Put them last rather than first.