The eBPFs are pre-compiled during the systemd-build with a different compiler than the cross-compiler used to build systemd itself.
This is either a 'clang-native' or a gcc (bpf-unknown-none) which do not see the BUILD_CFLAGS, that point to the correct include search patch. To address this have systemd's meson.build "propagate" the --system from the C_FLAGS into the BPF compiler call. Signed-off-by: Johannes Schneider <johannes.schnei...@leica-geosystems.com> --- ...pagate-sysroot-for-cross-compilation.patch | 31 +++++++++++++++++++ meta/recipes-core/systemd/systemd_255.6.bb | 1 + 2 files changed, 32 insertions(+) create mode 100644 meta/recipes-core/systemd/systemd/0023-meson-bpf-propagate-sysroot-for-cross-compilation.patch diff --git a/meta/recipes-core/systemd/systemd/0023-meson-bpf-propagate-sysroot-for-cross-compilation.patch b/meta/recipes-core/systemd/systemd/0023-meson-bpf-propagate-sysroot-for-cross-compilation.patch new file mode 100644 index 0000000000..e8116b0540 --- /dev/null +++ b/meta/recipes-core/systemd/systemd/0023-meson-bpf-propagate-sysroot-for-cross-compilation.patch @@ -0,0 +1,31 @@ +From 7463b382bcaf26aacc60b73f98f0262aa41db3ee Mon Sep 17 00:00:00 2001 +From: Johannes Schneider <johannes.schnei...@leica-geosystems.com> +Date: Thu, 20 Jun 2024 12:32:18 +0200 +Subject: [PATCH] meson: bpf: propagate 'sysroot' for cross compilation + +During cross-compilation of systemd, the compiler used to build the bpf's needs +to be pointed at the correct include searchpath. Which can be done by passing +the corresponding directory in through the cflags; for example in yocto/bitbake +this would work: CFLAGS += "--sysroot=${STAGING_DIR_TARGET}" + +Upstream-Status: Submitted [https://github.com/systemd/systemd/pull/33427] +Signed-off-by: Johannes Schneider <johannes.schnei...@leica-geosystems.com> +--- + meson.build | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/meson.build b/meson.build +index 187e7b216d..15df058ab6 100644 +--- a/meson.build ++++ b/meson.build +@@ -1691,6 +1691,7 @@ if conf.get('BPF_FRAMEWORK') == 1 + '-ffile-prefix-map=', + '-fdebug-prefix-map=', + '-fmacro-prefix-map=', ++ '--sysroot=', + ] + + foreach opt : c_args +-- +2.34.1 + diff --git a/meta/recipes-core/systemd/systemd_255.6.bb b/meta/recipes-core/systemd/systemd_255.6.bb index defdb15620..d2c5e09697 100644 --- a/meta/recipes-core/systemd/systemd_255.6.bb +++ b/meta/recipes-core/systemd/systemd_255.6.bb @@ -28,6 +28,7 @@ SRC_URI += " \ file://systemd-pager.sh \ file://0002-binfmt-Don-t-install-dependency-links-at-install-tim.patch \ file://0008-implment-systemd-sysv-install-for-OE.patch \ + file://0023-meson-bpf-propagate-sysroot-for-cross-compilation.patch \ " # patches needed by musl -- 2.34.1
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