I want to have a prerequisite file, which may or may not exist. If it exists,
I want make to behave as normal. If it does not exist, I want make to ignore
that prerequisite.
Is it possible?
--------------------
I tried
foobar: foo
touch foobar
foo:
but here if foo does not exist, then make " imagines this target to have been
updated whenever its rule is run. This implies that all targets depending on
this one will always have their commands run." (from the manual).
So this is not exactly what I want, I want that foobar command is not run when
foo does not exist.
---------------------------
Background: this would give a me an elegant solution to the auto-dependency,
without a "hole" that I mentioned recently
Mark
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