Re: simple dependency question

["Robert P. J. Day" <rpjday@crashcourse.ca>]

On Thu, 24 Jul 2014, Richard Purdie wrote:

> On Thu, 2014-07-24 at 07:13 -0400, Robert P. J. Day wrote:
> >   i realize that "DEPENDS" represents build-time dependencies, as in
> > ... all of the DEPENDS recipes must build *completely* before this
> > recipe can *begin* to build, is that correct?
> >
> >   however, in something like module.bbclass where one finds:
> >
> > do_make_scripts[deptask] = "do_populate_sysroot"
> >
> > does that now *override* the normal build-time dependency to say only
> > that this recipe's do_make_scripts task need only wait until all of
> > the "DEPENDS" recipes have completed their do_populate_sysroot tasks?
>
> The original DEPENDS meaning remains unchanged and applies to the
> configure task. The behaviour of DEPENDS comes from:
>
> do_configure[deptask] = "do_populate_sysroot"
>
> which means the configure task waits for all the populate_sysroot tasks
> of DEPENDS to complete before executing this task.
>
> do_make_scripts[deptask] = "do_populate_sysroot"
>
> Adds constraints to the make_scripts task where it also must wait until
> all DEPENDS populate_sysroot have run before it can.
>
> >   in other words, the instant i define an inter-task dependency, does
> > that relax the normal strong build dependency? since, if it didn't,
> > this wouldn't make any sense.
>
> and hence no, it doesn't relax other rules.

  ah, i should have known/remembered that. thanks.

rday

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

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