[bug #30505] Make doesn't update the entire dependency chain?

[Paul D. Smith]

Update of bug #30505 (project make):

                  Status:                    None => Fixed                  
             Assigned to:                    None => psmith                 
             Open/Closed:                    Open => Closed                 
           Fixed Release:                    None => CVS                    

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Follow-up Comment #1:

I can reproduce this behavior in both GNU make 3.81 and 3.82, but in the
current CVS version of make the target is rebuilt every time.  My suspicion is
that in earlier versions it's related to timestamps.  When you run make
continuously like that it can complete all commands in <1s.  Since make uses
time last modified stamps to determine whether things have changed, if all the
files have the same timestamp even after they're changed then make doesn't
realize they've really been updated.

However, I think in newer versions of make the effect of .PHONY is being
propagated up; it used to cause test.o to always be updated but test was only
updated if timestamps required it.

Anyway I'm marking this fixed.

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