Re: [PATCH v3 1/1] run imager in buildchroot-host on cross

[Henning Schild <henning.schild@siemens.com>]

I want a testcase for this where a whole wic gz/xz chain runs in CI with
a CROSS=1.

Henning

Am Tue, 13 Sep 2022 15:38:39 +0200
schrieb Felix Moessbauer <felix.moessbauer@siemens.com>:

> When globally enabling ISAR_CROSS_COMPILE, the imager and compression
> tasks run in the host buildchroot as well (instead of the target
> buildchroot).
> 
> Similar to the cross support for DPKG recipes, this can be toggled
> on a per-image basis by setting ISAR_CROSS_COMPILE in the image
> recipe.
> 
> Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
> ---
>  doc/user_manual.md                         | 11 +++++++++++
>  meta/classes/image-tools-extension.bbclass |  3 ---
>  2 files changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/doc/user_manual.md b/doc/user_manual.md
> index 5b2387d8..f38a133e 100644
> --- a/doc/user_manual.md
> +++ b/doc/user_manual.md
> @@ -986,6 +986,17 @@ built for the compat arch need to be tagged
> individually by setting `PACKAGE_ARCH = "${COMPAT_DISTRO_ARCH}"` in
> the package recipe. Non-tagged packages will continue to be built for
> the primary target architecture. 
> +### Cross Support for Imagers
> +
> +If `ISAR_CROSS_COMPILE = "1"`, the imager and optional compression
> tasks +run in the host buildchroot instead of the target buildchroot.
> +This gives a significant speedup when compressing the generated
> image, +as the compression is not emulated.
> +
> +In case your setup does not support cross-imaging, you can disable
> this +just for the particular image by adding `ISAR_CROSS_COMPILE =
> "0"` to your +image recipe.
> +
>  
>  ## Examining and debugging package generation inside their
> buildchroot 
> diff --git a/meta/classes/image-tools-extension.bbclass
> b/meta/classes/image-tools-extension.bbclass index b9968139..e13d4a3f
> 100644 --- a/meta/classes/image-tools-extension.bbclass
> +++ b/meta/classes/image-tools-extension.bbclass
> @@ -5,9 +5,6 @@
>  #
>  # This file extends the image.bbclass to supply tools for futher
> imager functions 
> -# Imager are expected to run natively, thus will use the target
> buildchroot. -ISAR_CROSS_COMPILE = "0"
> -
>  inherit buildchroot
>  
>  IMAGER_INSTALL ??= ""