[bug #21198] Wrong order of prerequisites with 3.81/CVS

[Martin Dorey]

Follow-up Comment #1, bug #21198 (project make):

In which order do you think the prerequisites should be built?  And why?

If C should be built before D, for example, then we have to tell make that D
depends on C.  Mentioning D after C in a list of prerequisites is not
sufficient.  Mentioning D on a later line than C is not sufficient.  We have
to say that D : C, or that D : X where X : C, or D : X where X : Y and Y : C,
or similar.

The ordering is otherwise up to make and may (and, as you've seen, does) vary
from release to release and even from invocation to invocation.  With -j, C
and D can even be built in parallel.


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