Re: hat, ghc

On Fri, Sep 02, 2005 at 10:22:06AM +0100, Malcolm Wallace wrote:

Frederik Eaton writes:

...

By the way, can I make a request to have the hmake default be to use the environment?

Ian Lynagh recently added this capability to hmake, but it wasn't documented (until yesterday). The relevant option is hmake-config add-dyn ghc which causes the version of ghc to be probed every time hmake is run, rather than only once at configure-time. Thus, it should pick up the current environment settings as needed.

OK.

...

Now, it appears to be looking for 'ghc-pkg' in the library directory of 'ghc' (rather, again, than in $PATH)

Well, hmake absolutely needs to use the ghc-pkg that belongs to the particular version of ghc. The heuristic used to find it might be slightly fragile, but it is the best available, and indeed it is based on the information given by ghc itself. If the executable has been moved such that querying ghc for its location is no longer reliable, that's tough to fix.

If 'ghc' could always tell you where the correct 'ghc-pkg' lives, then I guess that might be a reasonable way of doing things. However, nothing is strange about my installation, it is the default but with a different prefix, so something else must be broken. (And if 'hmake' had just gone with $PATH then it would have worked :) ) Frederik -- http://ofb.net/~frederik/