Source: linux Version: 5.10.70-1 Severity: serious Tags: ftbfs patch upstream Justification: fails to build from source (but built successfully in the past) X-Debbugs-Cc: nwfila...@gmail.com
Dear Maintainer, Attempting to build kernel packages using the machinery of https://salsa.debian.org/kernel-team/linux.git on a host where the "clang-bpf-co-re" test performed in the tools/bpf/bpftool directory passes will fail, as the build will attempt to bootstrap the BTF vmlinux.h header (confusingly, from the kernel in /boot/vmlinux-$(uname -r), as it can't find anything else); for example: > /dozer/scratch/nwf/tmp/linux/debian-kernel-linux/debian/build/build-tools/tools/bpf/bpftool/bpftool-bootstrap > btf dump file /boot/vmlinux-5.10.0-0.bpo.5-powerpc64le format c > > /dozer/scratch/nwf/tmp/linux/debian-kernel-linux/debian/build/build-tools/tools/bpf/bpftool/vmlinux.h > Error: failed to load BTF from /boot/vmlinux-5.10.0-0.bpo.5-powerpc64le: No > such file or directory The official builders do not pass this test (see, e.g. https://buildd.debian.org/status/fetch.php?pkg=linux&arch=ppc64el&ver=5.14.9-2&stamp=1633298169&raw=0 where the logs say "clang-bpf-co-re: [ OFF ]"), so I believe the correct answer on Debian systems is to disable the test (making it appear as if it fails) regardless of the host environment. The patch below does exactly that and allows me to build the kernel packages. Cheers, --nwf; --- a/tools/bpf/bpftool/Makefile 2021-10-11 01:52:26.625003863 +0100 +++ b/tools/bpf/bpftool/Makefile 2021-10-11 03:38:54.006277839 +0100 @@ -62,8 +62,7 @@ LLVM_STRIP ?= llvm-strip FEATURE_USER = .bpftool -FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \ - clang-bpf-co-re +FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \ clang-bpf-co-re
