Re: how to enforce ordering on a set of targets?

[Paul D. Smith]

%% Noel Yap <address@hidden> writes:

  ny> Robert P. J. Day wrote:

  >> *now*, i want to add another target, "populate", which works almost
  >> the same way but it has to do some preliminary processing in this
  >> makefile before the recursive (potentially parallel) call to the
  >> subdirectories.
  >> 
  >> if i call this preliminary processing step, say, "pre-populate", i
  >> can't just do this:
  >> 
  >> populate: pre-populate ${SUBDIRS}
  >> 
  >> as those steps would be allowed to be done in parallel, which is not
  >> good.  and i can't add
  >> 
  >> ${SUBDIRS}: pre-populate
  >> 
  >> since that dependency should *only* take effect when i'm invoking the
  >> makefile with the "populate" target, and no others.

  ny> Then it sounds like you need to use order rules.

Order rules won't keep the dependency from taking effect if the
"populate" target is not specified.

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