Phony Meaning Consider a long makefile with numerous targets all of which are PHONY meaning that the target name does not represent an existing file I can do either PHONY a a do someting a PHONY b b do someting b PHONY c c do someting c Or PHONY a b c a do someting a b do someting b c do someting c
PHONY is never overridden Like any other target each new PHONY definition adds more prerequisites to the existing list No there is no best practice that I m aware of Both work identically except one has a variable defined which might be useful for other things besides PHONY and one doesn t For the same reason there s no need for a So the dependency graph PHONY B A is waay surprising compared to PHONY B A Another argument is that an implementation of make must handle the PHONY target very special While this critique may seem rather theoretical to pointless since make is so ancient its syntax is here to stay
Phony Meaning
Phony Meaning
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True A PHONY target can have only dependencies without any rule In this case make will not execute any rule but will check if the dependencies are satisfied and if not will execute their rules If all is not a phony target GNU Make checks whether a file named all exists and is older than its prerequisites Try make d and you will see the difference Another important point is that the recipe of a phony target is always executed If you take this example all goal echo Done PHONY clean goal echo Hello World
Sensible phony targets include all and clean these don t correspond to real files but to actions you want the makefile to do Here s how to explain this to make PHONY all clean install test Directories are legitimate targets of makefile rules You should not make these phony mydir mkdir mydir Anyway this question seems to be answered quite extensively behind the link you posted test should be phony so that touch test make test doesn t claim that test is up to date What exactly is still unclear So the answer is Yes I need to add test to the PHONY because executing the command touch test would break this make command
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Another frequent situation is the grouping of several targets real or phony as prerequisites of one single other phony target But in both cases we can say that the resulting phony target is a kind of command In the first case it is a command that forces the build of a file In the second it is a kind of alias for a series of actions PHONY and wildcard are explained in the GNU Make documentation In short PHONY means that docker is a target but is not represented by a file in your current directory that has to be built And is a wildcard the value in the commands will have the value of whatever is when you call make on the target e g make docker foo
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Consider a long makefile with numerous targets all of which are PHONY meaning that the target name does not represent an existing file I can do either PHONY a a do someting a PHONY b b do someting b PHONY c c do someting c Or PHONY a b c a do someting a b do someting b c do someting c
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PHONY is never overridden Like any other target each new PHONY definition adds more prerequisites to the existing list No there is no best practice that I m aware of Both work identically except one has a variable defined which might be useful for other things besides PHONY and one doesn t For the same reason there s no need for a
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Phony Meaning - [desc-14]
