Oliver Kiddle writes:
.PHONY is a GNU make specific feature. We need to make the install target
depend on something that will either be newer than the INSTALL file or
that won't conflict with an existing real file.
Not a problem, surely? If you're not using GNU make, then it'll look for
a (presumably non-existent) file called ".PHONY", and hence the rule will
trigger anyway, with exactly the same effect.
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