I have a file which is not created by make but is created/updated by an outside process. The time stamp on this file will always be some time in the past. Let's call this file "O".
I have a target which I want make to build which we'll call "T". I want T rebuilt if file O is newer than it was the last time T was built. But even though the time on O might be newer than it was the last time T was built, it will still not be newer than T. Somehow I need to introduce some kind of time tracking mechanism on O which triggers a dependency on T, perhaps through a "stamp" file of some sort but I'm not quite getting my head around it. Any ideas? Cheers, b.
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