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  1. RHEL
  2. RHEL-85699

xdp-tools FTBFS when using LLVM-20 [rhel-9.7]

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    • ssg_networking
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      xdp-tools-1.5.3-1.el9 fails to build with clang-20 with the following error:

      /usr/bin/clang -S \
    -target bpf \
    -D __BPF_TRACING__ \
    -Wno-visibility -fno-stack-protector -DBPF_DIR_MNT=\"/sys/fs/bpf\" -DBPF_OBJECT_PATH=\"/usr/lib64/bpf\" -DMAX_DISPATCHER_ACTIONS=10 -DTOOLS_VERSION=\""1.5.3"\" -DLIBBPF_VERSION=\"1.5.0\" -DRUNDIR=\"/run\" -DHAVE_BPFTOOL -DHAVE_LIBBPF_PERF_BUFFER__CONSUME -DHAVE_LIBBPF_BTF__LOAD_FROM_KERNEL_BY_ID -DHAVE_LIBBPF_BTF__TYPE_CNT -DHAVE_LIBBPF_BPF_OBJECT__NEXT_MAP -DHAVE_LIBBPF_BPF_OBJECT__NEXT_PROGRAM -DHAVE_LIBBPF_BPF_PROGRAM__INSN_CNT -DHAVE_LIBBPF_BPF_PROGRAM__TYPE -DHAVE_LIBBPF_BPF_PROGRAM__FLAGS -DHAVE_LIBBPF_BPF_PROGRAM__EXPECTED_ATTACH_TYPE -DHAVE_LIBBPF_BPF_MAP_CREATE -DHAVE_LIBBPF_PERF_BUFFER__NEW_RAW -DHAVE_LIBBPF_BPF_XDP_ATTACH -DHAVE_LIBBPF_BPF_MAP__SET_AUTOCREATE -DHAVE_LIBBPF_BPF_PROG_TEST_RUN_OPTS -DHAVE_LIBBPF_BPF_XDP_QUERY -DHAVE_SECURE_GETENV -DLIBBPF_DYNAMIC -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64   -I../../headers  \
    -Wall \
    -Wno-unused-value \
    -Wno-pointer-sign \
    -Wno-compare-distinct-pointer-types \
    -Werror \
    -O2 -emit-llvm -c -g -o xdp-dispatcher.ll xdp-dispatcher.c
clang: error: argument unused during compilation: '-c' [-Werror,-Wunused-command-line-argument]

      clang-20 is reporting this warning as using "-S" makes clang to stop before running the assembler, making "-c" unused. Removing "-c" should fix the issue.

      Scratch build showing the issue: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=67117640

              tohojo Toke Høiland-Jørgensen
              rhn-support-jchecahi Jesus Checa Hidalgo
              nst-kernel-bugs nst-kernel-bugs
              Prasenjit Mukherjee Prasenjit Mukherjee
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                Created:
                Updated: