%% Noel Yap <[EMAIL PROTECTED]> writes:

  dj> my_var:=$(shell script)

  ny> File open/close is a very expensive operation.  If you're
  ny> including many makefiles, this may be where your lag is coming
  ny> from.

File open/close is a trivial operation compared to invoking a shell,
though! :-)

  ny> Also, whenever you include a makefile, there's a chance that make
  ny> will re-exec although the details aren't coming to me right now.

If (a) make can find a rule that will build the included makefile, and
(b) that rule shows the included makefile is out of date, then make will
rebuild the included makefile and re-exec.

-- 
-------------------------------------------------------------------------------
 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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