Does the coreboot build system support external patches?

[Jay Talbott]

I got this question from a client yesterday that I didn't know how to answer
because I focus primarily on the porting effort (getting coreboot to build
and boot for their hardware) and let the client figure out how they want to
manage the resulting code base once the porting effort is complete. So I
offered to inquire of the coreboot community to see if anybody can provide
an answer for my client.

Below is the inquiry that I received:

I'm looking at how best to structure our coreboot repositories.  Does the
coreboot build system support the concept of external patches? With
buildroot you can keep your changes is a directory tree separate from the
FOSS tree. Then during the build step your patches get applied and compiled
using another separate build tree.

Thanks,

- Jay

Jay Talbott
Principal Consulting Engineer
SysPro Consulting, LLC
3057 E. Muirfield St.
Gilbert, AZ 85298
[phone]
[phone] (FAX)
  [e-mail]

http://www.sysproconsulting.com/ http://www.sysproconsulting.com

[Martin Roth]

coreboot uses the site-local directory to allow users to extend the
coreboot build outside of the regular coreboot coreboot files.
Create the coreboot/site-local directory, and add Makefile.inc and Kconfig
files.  Both of these files will get picked up by coreboot.

To run steps at the start of the build, you can create a target that does
whatever is needed, then calls the 'all:' target to do the build.
At the end of the build, you can hook into the 'build_complete::' target to
run whatever finalization steps are needed.

Martin

On Thu, Feb 1, 2018 at 10:53 AM, Jay Talbott <
[e-mail]> wrote:
> I got this question from a client yesterday that I didn’t know how to
> answer because I focus primarily on the porting effort (getting coreboot to
> build and boot for their hardware) and let the client figure out how they
> want to manage the resulting code base once the porting effort is complete.
> So I offered to inquire of the coreboot community to see if anybody can
> provide an answer for my client.
>
> Below is the inquiry that I received:
>
> I’m looking at how best to structure our coreboot repositories.  Does the
> coreboot build system support the concept of external patches? With
> buildroot you can keep your changes is a directory tree separate from the
> FOSS tree. Then during the build step your patches get applied and compiled
> using another separate build tree.
>
> Thanks,
> Jay
>
> Jay Talbott
> Principal Consulting Engineer
> SysPro Consulting, LLC
> 3057 E. Muirfield St.
> Gilbert, AZ 85298
> [phone]
> [phone] (FAX)
> [e-mail]
>
> http://www.sysproconsulting.com