08.08.2022 11:17, Moessbauer, Felix wrote:
>
> Hi,
>
> In ISAR v0.9 we were able to use build dependencies from the backports 
> repository:
>
>  1. Add the backports repo to DISTRO_APT_SOURCES
>  2. Write an apt preferences file to prefer the backports package and
>     add it to DISTRO_APT_PREFERENCES
>
> This still works for runtime dependencies, but not for build dependencies.
> The sbuilder simply does not attract the package from backports as 
> they have "NotAutomatic: yes".
>
> Maybe we could work around by using ` --build-dep-resolver="apt"`.
> But then more questions arise:
>
> - are the DISTRO_APT_SOURCES added as –external-repository? I don’t 
> think so
>
> - when creating the base-schroot: Is the repo considered (and are 
> DISTRO_APT_PREFERENCES active)
>
> - are the DISTRO_APT_PREFERENCES files added to the schroot?
>
> Help wanted.
>
> Felix
>
Hello Felix,

I've tried to setup Debian Bullseye with backports preferred on the 
latest next and it supposed to work.
Here are all the changes I've made:

diff --git a/meta/conf/distro/debian-bullseye-backports.list 
b/meta/conf/distro/debian-bullseye-backports.list
new file mode 100644
index 0000000..90f1c9a
--- /dev/null
+++ b/meta/conf/distro/debian-bullseye-backports.list
@@ -0,0 +1,2 @@
+deb http://deb.debian.org/debian bullseye-backports main contrib non-free
+deb-src http://deb.debian.org/debian bullseye-backports main contrib 
non-free
diff --git a/meta/conf/distro/debian-bullseye-backports.pref 
b/meta/conf/distro/debian-bullseye-backports.pref
new file mode 100644
index 0000000..381ce80
--- /dev/null
+++ b/meta/conf/distro/debian-bullseye-backports.pref
@@ -0,0 +1,3 @@
+Package: *
+Pin: release a=bullseye-backports
+Pin-Priority: 1000
diff --git a/meta/conf/distro/debian-bullseye.conf 
b/meta/conf/distro/debian-bullseye.conf
index 9e07269..e3dd079 100644
--- a/meta/conf/distro/debian-bullseye.conf
+++ b/meta/conf/distro/debian-bullseye.conf
@@ -10,3 +10,7 @@ DISTRO_CONFIG_SCRIPT ?= "debian-configscript.sh"
  DISTRO_KERNELS ?= "4kc-malta 5kc-malta 686 686-pae amd64 arm64 armmp \
      armmp-lpae cloud-amd64 loongson-3 octeon powerpc64le rpi s390x 
marvell \
      rt-686-pae rt-amd64 rt-arm64 rt-armmp"
+
+DISTRO_APT_SOURCES = 
"conf/distro/${BASE_DISTRO}-${BASE_DISTRO_CODENAME}.list 
conf/distro/${BASE_DISTRO}-${BASE_DISTRO_CODENAME}-backports.list"
+
+DISTRO_APT_PREFERENCES = 
"conf/distro/${BASE_DISTRO}-${BASE_DISTRO_CODENAME}-backports.pref"

After that I've just built the target:

$ bitbake mc:qemuamd64-bullseye:isar-image-base

And see that backports package versions are actually used. For example:

$ cat 
build/tmp/work/debian-bullseye-amd64/example-module-amd64/1.0-r0/temp/log.do_dpkg_build 
| grep "Setting up linux-compiler-gcc-10-x86"
Setting up linux-compiler-gcc-10-x86 (5.18.14-1~bpo11+1) ...