Re: [gentoo-dev] Haskell support in Gentoo

[Oliver Burnett-Hall <olly-bh@blueyonder.co.uk>]

On Wed, 2003-04-02 at 12:14, Peter Simons wrote:
> Now we wonder how to organize this in the ebuild. A virtual
> "haskell-compiler" target won't do us any good, because -- as I said
> -- many packages require ghc. Hard-coding the ebuilds to depend on ghc
> only is not the right thing to do either, because some packages _can_
> be build with either ghc or nhc, and ideally, the user would be able
> to choose which compiler should be used.

You could create virtual/haskellc (or virtual/hc or whatever) and
packages could then depend on any of:
  o virtual/haskellc
  o dev-lang/ghc
  o dev-lang/nhc98
according to their compiler requirements.

If you want to give the user the choice of which compiler to use (for
packages that could be built with either compiler) then provide a tool,
along the lines of gcc-config, which either creates symlinks or plays
around with the path to select one of these compilers.

HTH,

- olly


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