Re: Compiling git with makepp patch
From: Jonathan Nieder <hidden>
Date: 2016-06-15 22:49:22
Hi, Daniel Pfeiffer wrote:
.PHONY: FORCE I don't know why you depend on a phony that has no rule — I also had to make that possible.
Surely the name explains it. :)
The file needs to be built immediately so that it can be included, before reading the rest of the makefile. But the dependency is only known to be phony after running the rule. Here you have a hen-egg problem, where I have no clue how Gnu make can cope (this is the one case where it requires .PHONY).
GNU make, unlike, say, pmake, reads all the rules before it runs anything iirc. So you can have -include foo foo: echo bar: >foo echo ' echo hi' >>foo and it will cope okay. Anyway, the git makefile is very far from topologically sorted; if you are suggesting we change that, that's fine with me, as long as the new rule is somehow justified and consistent. Hope that helps, Jonathan