Re: cabal posix build-depends issue

Isaac Jones writes:

...

If it depends on posix, on a non-posix system, the user will get an error because the posix package doesn't exist.

If it doesn't depend on posix on a posix-based system, then ghc won't get the -package posix flag, and so cabal will fail to link.

There is a further problem: nhc98 has neither posix nor util packages, so a straightforward dependency on either would be wrong. Simon Marlow writes:

My gut feeling is that we should be able to say something like build-depends: if-not-os("mingw32",unix >= 1.0)

I would agree that we need platform-selected dependencies. Platform includes compiler, compiler version, OS, and possibly OS version. Regards, Malcolm