Re: [Haskelldb-users] Compiling with GHC 6.4, HSQL, and MySQL

[Bjorn B. <bri...@cs...>]

Robert van Herk wrote:
> I think that Setup.hs in the repos together with the cabal file could b=
e=20
> used to compile with GHC 6.4 and PostgreSQL support.
>=20
> However, I would like to compile with GHC 6.4, HSQL, and MySQL (and NO=20
> PostgreSQL).
>=20
> When I try runhaskell Setup.hs build, I get:
>=20
> $ runhaskell Setup.hs build
> Preprocessing library haskelldb-0.9...
> can't find source for Database.HaskellDB.HSQL.PostgreSQL in ["build/ghc=
"]
>=20
> In the output of "runhaskell Setup.hs configure", I don't see anything=20
> trying to look for availability of PostgreSQL either. Is there an easy=20
> solution to this?

Short answer: no, there is no easy answer. As far as I know anyway.

Does anyone have an idea about how we should handle HSQL providing only=20
some backends, and how we should handle conditionally compiling only=20
some backends? This is now done with configure, but using plain Cabal=20
would be nice.

Maybe we could always provide all backends, but use CPP to make the=20
unavailable ones dummies that fail at runtime?

/Bj=F6rn