Re: [PATCH 2/2] add example how to use derived sbuild chroots

[Jan Kiszka <jan.kiszka@siemens.com>]

On 13.04.23 09:00, Felix Moessbauer wrote:
> This patch extends the samefile recipe to use a derived sbuild chroot to
> compile the tool using clang instead of gcc. While there are easier ways
> to achive this goal, it is still valuable to demonstrate how to use the
> infrastructure.
> 
> Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
> ---
>  meta-isar/recipes-app/samefile/samefile_2.14.bb       |  8 ++++++++
>  .../sbuild-chroot/sbuild-chroot-target-clang.bb       | 11 +++++++++++
>  2 files changed, 19 insertions(+)
>  create mode 100644 meta-isar/recipes-devtools/sbuild-chroot/sbuild-chroot-target-clang.bb
> 
> diff --git a/meta-isar/recipes-app/samefile/samefile_2.14.bb b/meta-isar/recipes-app/samefile/samefile_2.14.bb
> index c53c9445..989e1983 100644
> --- a/meta-isar/recipes-app/samefile/samefile_2.14.bb
> +++ b/meta-isar/recipes-app/samefile/samefile_2.14.bb
> @@ -5,6 +5,9 @@
>  
>  inherit dpkg
>  
> +# for demo reasons, we compile with clang if not cross-compiling
> +SBUILD_FLAVOR = "${@ 'clang' if d.getVar('ISAR_CROSS_COMPILE') != '1' else '' }"
> +
>  DEBIAN_DEPENDS = "\${misc:Depends}"
>  DESCRIPTION = "utility that finds files with identical contents"
>  
> @@ -42,4 +45,9 @@ EOF
>  
>      # We can also customize afterwards, in this case change the package section.
>      sed -i -e 's/Section: misc/Section: utils/g' ${S}/debian/control
> +
> +    # use clang to compile (no cross support yet)
> +    if [ "${SBUILD_FLAVOR}" = "clang" ]; then
> +        sed -i -e 's/\(#\!.*\)/\1\nexport CC=clang/g' ${S}/debian/rules
> +    fi
>  }
> diff --git a/meta-isar/recipes-devtools/sbuild-chroot/sbuild-chroot-target-clang.bb b/meta-isar/recipes-devtools/sbuild-chroot/sbuild-chroot-target-clang.bb
> new file mode 100644
> index 00000000..3df16368
> --- /dev/null
> +++ b/meta-isar/recipes-devtools/sbuild-chroot/sbuild-chroot-target-clang.bb
> @@ -0,0 +1,11 @@
> +# Root filesystem for packages building with clang
> +#
> +# This software is a part of ISAR.
> +# Copyright (C) 2023 Siemens AG
> +
> +DESCRIPTION = "Isar sbuild/schroot filesystem for target (clang variant)"
> +
> +require recipes-devtools/sbuild-chroot/sbuild-chroot-target.bb
> +
> +SBUILD_FLAVOR = "clang"

Could this be auto-derived from a helper-include by taking the recipe
name and sub-tracting a conventional prefix?

Jan

> +SBUILD_CHROOT_PREINSTALL_COMMON += "clang"

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