RE: include files with :=

[Paul D. Smith]

%% "Dill, John" <address@hidden> writes:

  >> my_var:=$(shell script)

  dj> I did some more investigation and found that this is where my
  dj> performance problem is.  It appears that time increases linearly
  dj> with the number of times the include file with ':=' variables are
  dj> included, which means make is evaluating it each time it is seen
  dj> like it should.  Adding inclusion guards to my include files
  dj> should fix my performance problem.

You can also add guards around that variable:

    ifndef my_var
      my_var := $(shell script)
    endif

Of course be aware of getting it from the environment if you don't want
to allow that; you can use a fancier test based on the $(origin ...)
function to avoid that if you want.

-- 
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