Rule-specific variables

[Jeffrey Ratcliffe]

I'm trying to optionally add arguments to a command, depending on the
target, as shown by my (obviously non-working) example:

%.xdb : %.bdfi
        var=1
        [ $(basename $(@F)) = part_of_filename ] && var=2
        command --var=$(var) $(basename $(@F)).bdfi

I could make a rule for each possible target, but it seems it could be
simpler, as there are several possible combinations.

Any ideas?

Please CC me on replies, as I am not subscribed.

Regards

Jeff