[yocto] u-boot precompiled ?

[Matthias.Heise at atlas-elektronik.com]

Hello Matt,

thanks very much for your reply, I was able to create a simple patch changing an u-boot setting as test and "bbappended" it. I just didn't believe before that the various u-boot settings are "hard-coded" but they obviously are in the "<board>.h", so patching it seems to be the only way for changing settings from within yocto, right?
Regards,
Mat

Von: Matt Schuckmann [mailto:Matt.Schuckmann at planar.com]
Gesendet: Donnerstag, 4. Dezember 2014 18:31
An: Heise, Matthias; yocto at yoctoproject.org
Betreff: RE: u-boot precompiled ?

Mat,

I'm fairly new to OpenEmbedded (4 months now and I still feel like a noobi but I'm trying to give back while the pain is still fresh in my mind)
For something like u-boot it kind of depends on what your changing. If you need to change the u-boot code and the changes are small then typically you'd create a patch f for your changes and then make them part of a .bbappend in your layer for the recipe. There are examples on the net for how to create a .bbappend and reference the patch file.

Generally your .bbappend can be as simple as:

FILESEXTRAPATHS_prepend = ":${THISDIR}/files"
SRC_URI += "files://xyzzy.patch"

Where your patches are in subdirectory of your recipe directory.

Remember that generally recipes are about how to obtain the code, build it and package it for distribution, you can do recipes that deal with a pre-built binary but that is generally not the case.

Hope this helps,

Matt S.



From: yocto-bounces at yoctoproject.org<mailto:yocto-bounces at yoctoproject.org> [mailto:yocto-bounces at yoctoproject.org] On Behalf Of Matthias.Heise at atlas-elektronik.com<mailto:Matthias.Heise at atlas-elektronik.com>
Sent: Thursday, December 04, 2014 1:49 AM
To: yocto at yoctoproject.org<mailto:yocto at yoctoproject.org>
Subject: Re: [yocto] u-boot precompiled ?

Even if this is a stupid question a little advise would be nice ... like "don't ask so stupid questions, go read this and that" or something... no time ? Should I rather unsubscribe from this list until I'm an expert?

Von: Heise, Matthias
Gesendet: Mittwoch, 3. Dezember 2014 15:15
An: 'yocto at yoctoproject.org'
Betreff: u-boot precompiled ?

Hi all,

I'm still trying to find out basic things about getting a system up and running. This question is about U-Boot, is it right that for example for my wandboard a pre-compiled *.imx is just downloaded ?
So if I want to make settings to U-Boot I make them directly in the source, compile it and re-direct in a recipe to take that new file as bootloader ? Or can I make the settings within a recipe and I just didn't find the spot ?
Thanks for your time,
Regards
Mat
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