Re: Configurations proposal

25 Oct 2006


      On Tue, 2006-10-24 at 21:45 -0500, Brian Smith wrote:
...
(sorry, I responded to the wrong list)
On 10/24/06, Duncan Coutts
 wrote:
        On the other hand, in Gtk2Hs I know one case where we do this.
        We have a
        Graphics.UI.Gtk.Cairo api module that is only included if Gtk
        was built
        against Cairo. In any case it could be faked by using cpp to
        just not 
        export anything rather than not having the module exposed at
        all. So
        it's not clear that it's worth banning. Or maybe making it
        slightly
        harder is worth it so that people don't get in the habit.
Couldn't you split this into Gtk and Gtk-Cairo packages, where the
latter is only built if Cairo is available?
Yes I could and that's probably the right thing to do.
...
Similarly, in your GUI example, couldn't you have seperate foo and
foo-gui packages, and only build the foo-gui package if the GUI
libraries are available?
I'm not so sure about that one.
...
Otherwise, how can you say "I depend on the Gtk package being built
with Cairo support" and "I depend on the GUI portion of the foo
package?"
Indeed.


Duncan