%% Yannick Patois <[EMAIL PROTECTED]> 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.

-- 
-------------------------------------------------------------------------------
 Paul D. Smith <[EMAIL PROTECTED]>          Find some GNU make tips at:
 http://www.gnu.org                      http://make.paulandlesley.org
 "Please remain calm...I may be mad, but I am a professional." --Mad Scientist


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