[Buildroot] Defining a package with no dependencies

[Buildroot] Defining a package with no dependencies

[Jameson Collins]

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If I have a package that doesn't build anything, doesn't depend on
anything, and doesn't have anything depending on it, is it possible to tell
buildroot to build this package without first building the toolchain?

An example of a package like this might be the `flash-my-board` recipe that
is shown in the manual.  Yes, in this case the package doesn't make any
sense unless boot.bin existed, but you can see how it might be useful to
have a package that performs a task and not necessarily generate a build
product.

Thanks,
Jay

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Re: [Buildroot] Defining a package with no dependencies

[Thomas Petazzoni via buildroot]

Hello,

On Wed, 3 Aug 2022 19:30:07 -0400
Jameson Collins <jameson.collins@gmail.com> wrote:

> If I have a package that doesn't build anything, doesn't depend on
> anything, and doesn't have anything depending on it, is it possible to tell
> buildroot to build this package without first building the toolchain?

You could do:

<pkg>_ADD_TOOLCHAIN_DEPENDENCY = NO

but that's normally reserved for packages that are part of the
toolchain build.

> An example of a package like this might be the `flash-my-board` recipe that
> is shown in the manual.  Yes, in this case the package doesn't make any
> sense unless boot.bin existed, but you can see how it might be useful to
> have a package that performs a task and not necessarily generate a build
> product.

flash-my-board inside the manual is *not* a package. It's just an
example in the external.mk, to show that external.mk can be used to
provide additional custom make targets. It has nothing to do with a
package.

Best regards,

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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Re: [Buildroot] Defining a package with no dependencies

[Arnout Vandecappelle]

On 04/08/2022 01:30, Jameson Collins wrote:
> If I have a package that doesn't build anything, doesn't depend on anything, and 
> doesn't have anything depending on it, is it possible to tell buildroot to build 
> this package without first building the toolchain?

  If it's not building anything for the target, you could claim that it's a host 
package. So use host-generic-package.

  Regards,
  Arnout

> 
> An example of a package like this might be the `flash-my-board` recipe that is 
> shown in the manual.  Yes, in this case the package doesn't make any sense 
> unless boot.bin existed, but you can see how it might be useful to have a 
> package that performs a task and not necessarily generate a build product.
> 
> Thanks,
> Jay
> 
> _______________________________________________
> buildroot mailing list
> buildroot@buildroot.org
> https://lists.buildroot.org/mailman/listinfo/buildroot
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Re: [Buildroot] Defining a package with no dependencies

[Jameson Collins]

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Thanks Thomas and Arnout,

Both of these solutions worked perfectly (switching to a
host-generic-package, and <pkg>_ADD_TOOLCHAIN_DEPENDENCY = NO).

I had forgotten that I switched from a regular make target to a
generic-package because I wanted buildroot to manage build stamps.





On Thu, Aug 4, 2022 at 6:53 AM Thomas Petazzoni <
thomas.petazzoni@bootlin.com> wrote:

> Hello,
>
> On Wed, 3 Aug 2022 19:30:07 -0400
> Jameson Collins <jameson.collins@gmail.com> wrote:
>
> > If I have a package that doesn't build anything, doesn't depend on
> > anything, and doesn't have anything depending on it, is it possible to
> tell
> > buildroot to build this package without first building the toolchain?
>
> You could do:
>
> <pkg>_ADD_TOOLCHAIN_DEPENDENCY = NO
>
> but that's normally reserved for packages that are part of the
> toolchain build.
>
> > An example of a package like this might be the `flash-my-board` recipe
> that
> > is shown in the manual.  Yes, in this case the package doesn't make any
> > sense unless boot.bin existed, but you can see how it might be useful to
> > have a package that performs a task and not necessarily generate a build
> > product.
>
> flash-my-board inside the manual is *not* a package. It's just an
> example in the external.mk, to show that external.mk can be used to
> provide additional custom make targets. It has nothing to do with a
> package.
>
> Best regards,
>
> Thomas
> --
> Thomas Petazzoni, co-owner and CEO, Bootlin
> Embedded Linux and Kernel engineering and training
> https://bootlin.com
>

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