[bug #54854] multi-target rules invoked too often with -j2

[Vassilis Virvilis]

Follow-up Comment #6, bug #54854 (group make):

Thanks for taking the time to explain with a simple and easy to follow
example.

>From the looks of it I have to agree that this is a legitimate case and cannot
to lead to a broken build.

Unfortunately my case is a rule for a program that builds two real files (not
.PHONY). The problem is the second -j thread overwrites the output the first.
I agree that the solution is to restructure the rules in a way to avoid
behavior and this is what I have done but it took a while to figure it out.

Hopefully this thread will be findable by other people who may wonder about
the exact GNU Make behavior and possible workarounds.

Thanks again.




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