[PATCH] systemd: restore libdw/libelf to elfutils PACKAGECONFIG RRECOMMENDS

[<daniel.turull@ericsson.com>]

From: Daniel Turull <daniel.turull@ericsson.com>

systemd-coredump dlopen()s libdw to symbolicate backtraces. These
libraries are marked as "suggested" in libsystemd-shared's .note.dlopen
metadata, causing them to land in RSUGGESTS rather than RRECOMMENDS.
RSUGGESTS packages are not installed into the rootfs, breaking
symbolication and causing test_systemd_coredump_minidebuginfo to fail.

Restore explicit RRECOMMENDS for libdw and libelf when elfutils
PACKAGECONFIG is enabled to ensure backtrace symbolication works.

Fixes regression from bb9c619174 ("systemd: drop redundant runtime
dependencies").

To recreate the issue in qemux86-64:

DISTRO_FEATURES:append = "minidebuginfo"
TEST_SUITES = "ping ssh systemd"

bitbake core-image-minimal
bitbake core-image-minimal -c testimage

Before:

RESULTS - systemd.SystemdServiceTests.test_systemd_coredump_minidebuginfo: FAILED (2.71s)

After:

RESULTS - systemd.SystemdServiceTests.test_systemd_coredump_minidebuginfo: PASSED (2.71s)

AI-Generated: Kiro with Claude Opus 5

Signed-off-by: Daniel Turull <daniel.turull@ericsson.com>
---
builds on top of the systemd: update to 261.2
---
 meta/recipes-core/systemd/systemd_261.2.bb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-core/systemd/systemd_261.2.bb b/meta/recipes-core/systemd/systemd_261.2.bb
index b295a69548..56c33ef157 100644
--- a/meta/recipes-core/systemd/systemd_261.2.bb
+++ b/meta/recipes-core/systemd/systemd_261.2.bb
@@ -126,7 +126,11 @@ PACKAGECONFIG[default-compression-lz4] = "-Dlz4=true -Ddefault-compression=lz4,,
 PACKAGECONFIG[default-compression-xz] = "-Dxz=true -Ddefault-compression=xz,,xz"
 PACKAGECONFIG[default-compression-zstd] = "-Dzstd=true -Ddefault-compression=zstd,,zstd"
 PACKAGECONFIG[efi] = "-Defi=true -Dbootloader=enabled,-Defi=false -Dbootloader=disabled,python3-pyelftools-native"
-PACKAGECONFIG[elfutils] = "-Delfutils=enabled,-Delfutils=disabled,elfutils"
+# libdw/libelf are dlopen()ed, but upstream marks them as "suggested" in the
+# .note.dlopen metadata so they end up in RSUGGESTS, which is not installed.
+# systemd-coredump cannot symbolicate backtraces without libdw, so promote
+# these to RRECOMMENDS explicitly.
+PACKAGECONFIG[elfutils] = "-Delfutils=enabled,-Delfutils=disabled,elfutils,,libdw libelf"
 PACKAGECONFIG[fido] = "-Dlibfido2=enabled,-Dlibfido2=disabled,libfido2-initial"
 PACKAGECONFIG[firstboot] = "-Dfirstboot=true,-Dfirstboot=false"
 PACKAGECONFIG[repart] = "-Drepart=enabled,-Drepart=disabled"