View source for Talk:Cabal/How to install a Cabal package

I would like to add the following to the end of this topic:

(begin proposed addendum)

'''Note''': If you have more than one Haskell compiler on your system,
use the <code>--with-compiler</code> option for the
<code>configure</code> step. That will ensure that Cabal
uses the correct compiler during the entire installation process.
For example:

 <code>
  runghc Setup.hs configure --with-compiler=ghc-6.8.2
  runghc Setup.hs build
  runghc Setup.hs install
 </code>

(end proposed addendum)

Without this, I didn't know that you need to use that
flag. I just ran runhaskell with an explicit path to the compiler
that I wanted. Cabal then ran the wrong ghc-pkg, and registered
the installation to the wrong compiler.

'''Question about DARCS''': How does one install from a DARCS repository?  In some places this seems to be a "natural thing to do" for some people but it isn't self explanatory.

:I don't really follow. If you have a directory containing source files managed by Darcs, then if it is packaged by Cabal, (has a foo.cabal, Setup.hs, etc.), then you build and install as normal. If the sources in a repository are packaged with Autotools, then you configure && make && make install. And so on - whether it's a tarball or a darcs repo or a git repo or a svn repo makes no difference. --[[User:Gwern|Gwern]] 01:47, 17 December 2008 (UTC)