Re: Choosing between several rules for a single targed based on prerequisites avaibility

[Paul D. Smith]

%% Yannick Patois <address@hidden> writes:

  yp> I have a target (A) that can be build either by applying a given rule on
  yp> a prerequisites (P1) or another rule on another prerequisites (P2).

  yp> I would like a Makefile that does:
  yp> - If only one of P1 or P2 exists, use the available rule to build it
  yp> - If both exists, use P1

  yp> Is there a way to say that in a Makefile?
  yp> I couldnt find anything about this.

If you can write it as a pattern rule (or two pattern rules, really)
then it will work exactly as you expect.

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