Source: systemd Version: 256.6-1 Tags: patch upstream Forwarded: https://github.com/systemd/systemd/pull/34589 X-Debbugs-Cc: debian-cr...@lists.debian.org
Hi, I tried cross building systemd (stageless) again and it does not work. The immediate cause is failure to satisfy Build-Depends and the problematic dependency is clang as it depends on binutils. Intuition is that we want to run clang and since we pass a -target option we really want the native one here. Thus I tried annotating clang using :native. Next up, meson fails finding bpftool, which got installed for the host architecture and presumably is needed for the build architecture. It is not clear to me whether marking it Multi-Arch: foreign would be correct and seek input from others (hello d-cross@l.d.o). Meanwhile, one can work around this by also annotating it :native. Then, meson actually starts building stuff until it runs clang where it fails finding asm/types.h. This is due to the relevant -isystem being skipped when is_cross_compiling. I forwarded this part upstream as https://github.com/systemd/systemd/pull/34589. Technically, this is unfixable as clang does not get us the information that we'd need here, so I only fix it when using gcc or doing a native build. Assuming that the upstream PR works out, that still leaves us with clang and bpftool. I think the former reasonably need to be annotated :native as there is no chance of clang becoming M-A:foreign. However the latter needs someone who knows bpftool. Helmut
