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Re: do phony deps take "precedence" over regular deps?


From: John Graham-Cumming
Subject: Re: do phony deps take "precedence" over regular deps?
Date: Mon, 07 Feb 2005 10:35:46 -0500

On Mon, 2005-02-07 at 09:54, Robert P. J. Day wrote:
> $(Program): build_msg (OBJECTS) $(BUILTINS_DEP) ...
>       ... regular commands here ...
> 
> .PHONY: build_msg
> build_msg:
>       @printf ... building $(Program) ...
> 
> the text reads:
> 
>   "Because the printf is in a phony target, the message is printed
> immediately before any prerequisites are updated."
> 
> really?

No.  Just try an experiment:

    .PHONY: all
    all: real-target phony-target other-real-target

    real-target: ; @echo $@
    other-real-target: ; @echo $@

    .PHONY: phony-target
    phony-target: ; @echo $@

And you'll see the output is

    real-target
    phony-target
    other-real-target

Try permuting the prerequisites of all and you see that Make traverses
them left to right.  PHONY only affects whether the prerequisite will be
updated or not.

John.
-- 
John Graham-Cumming

Home: http://www.jgc.org/
Work: http://www.electric-cloud.com/
POPFile: http://getpopfile.org/
GNU Make Standard Library: http://gmsl.sf.net/






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