Hi Martin, I am working with Cong to get Clang/LLVM-13 to test. But I am confused whether CLANG/LLVM-13 is released or not. >From https://apt.llvm.org/ , I saw llvm-13 was released in Feb, but it does not have the diff you mentioned. >From the following links, I am not sure if LLVM-13 was really released or still in the process. https://llvm.org/docs/ReleaseNotes.html#external-open-source-projects-using-llvm-13 https://github.com/llvm/llvm-project/releases Did I miss something? Where could I get a good clang/llvm-13 ? Or maybe clang-14? Thanks Regards, Jiang On Tue, Mar 30, 2021 at 2:43 PM Martin KaFai Lau <kafai@xxxxxx> wrote: > > On Tue, Mar 30, 2021 at 12:58:22PM -0700, Cong Wang wrote: > > On Tue, Mar 30, 2021 at 7:36 AM Alexei Starovoitov > > <alexei.starovoitov@xxxxxxxxx> wrote: > > > > > > On Tue, Mar 30, 2021 at 2:43 AM Lorenz Bauer <lmb@xxxxxxxxxxxxxx> wrote: > > > > > > > > On Thu, 25 Mar 2021 at 01:52, Martin KaFai Lau <kafai@xxxxxx> wrote: > > > > > > > > > > This series adds support to allow bpf program calling kernel function. > > > > > > > > I think there are more build problems with this. Has anyone hit this before? > > > > > > > > $ CLANG=clang-12 O=../kbuild/vm ./tools/testing/selftests/bpf/vmtest.sh -j 7 > > > > > > > > GEN-SKEL [test_progs-no_alu32] bind6_prog.skel.h > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1 > > > > GEN-SKEL [test_progs-no_alu32] bind_perm.skel.h > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1 > > > > GEN-SKEL [test_progs-no_alu32] bpf_cubic.skel.h > > > > GEN-SKEL [test_progs-no_alu32] bpf_dctcp.skel.h > > > > GEN-SKEL [test_progs-no_alu32] bpf_flow.skel.h > > > > libbpf: failed to find BTF for extern 'tcp_cong_avoid_ai' [27] section: -2 > > > > Error: failed to open BPF object file: No such file or directory > > > > > > The doc update is on its way: > > > https://patchwork.kernel.org/project/netdevbpf/patch/20210330054156.2933804-1-kafai@xxxxxx/ > > > > We just updated our clang to 13, and I still get the same error above. > Please check if the llvm/clang has this diff > https://reviews.llvm.org/D93563
