[OE-core] simple dependency question

[Richard Purdie]

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.

Cheers,

Richard