[yocto] Building, Using SDK

[Dudziak Krzysztof]

Hi,
Thanks for feedback from you.
Embedded system native package building and image creation might not be the regular case
as frequently embedded system do not provide power needed for that.
So let's concentrate to cross-compilation.

One need first working toolchain.
In next steps one can build BSP, user-space, image(-s).
Is the sequence of step as presented previously the right one?
step 1: bitbake <image-name> -c populate_sdk
step : build bootloader, kernel
step : bitbake <image-name>

krzysiek

From: ChenQi [mailto:Qi.Chen at windriver.com]
Sent: Monday, 17. September 2018 05:50
To: Dudziak Krzysztof <Krzysztof.Dudziak at gemalto.com>; yocto at yoctoproject.org
Subject: Re: [yocto] Building, Using SDK

On 09/13/2018 10:18 PM, Dudziak Krzysztof wrote:
Hi,

Alex González elaborates in his book Embedded Linux Development Using Yocto Projets (2nd Edition)
SDK-related questions - basics, building, usage (chapter 4).

1.
Downloading then installing precompiled SDK was one of all available options according to Alex.
He elaborates how to find it on server in Internet, how to select needed one and install it.
I wonder how to integrate downloaded and installed precompiled SDK
to Poky release used on build system?


I'd suggest you not using precompiled SDK unless you are justing doing some simple cross compilation that requires no additional libs, header files, etc.


2.
Preparing / building SDK by oneself was further option with image target's 'populate_sdk' Bitbake task
as the recommended way (according to Alex in chapter's certain section).
One would need only to start populate_sdk task for image which matches root file system of system in development.
As soon as task completed SDK can be installed using generated script.
But how does it work for first build where rootfs was not built in the past.
Is in that case following procedure the proper one?
step 1: bitbake <image-name> -c populate_sdk
step 2: bitbake <image-name>


The populate_sdk task directly installs rpm packages (nativesdk ones and target ones) to form an SDK.
It does not need rootfs to be generated first.

Normally you use an SDK for a specific target.
So the `bitbake IMAGE' is used to generate the image, and `bitbake IMAGE -c populate_sdk' is used to generate the SDK for the image.

Best Regards,
Chen Qi


krzysiek




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 This message and any attachments are intended solely for the addressees and may contain confidential information. Any unauthorized use or disclosure, either whole or partial, is prohibited.
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