On Tue, Mar 21, 2023 at 2:40 PM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > > Hi all, > > On Fri, 17 Mar 2023 09:50:25 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > > > > After merging the perf tree, today's linux-next build (native perf) > > failed like this: > > > > Auto-detecting system features: > > ... clang-bpf-co-re: [ [32mon [m ] > > ... llvm: [ [31mOFF [m ] > > ... libcap: [ [32mon [m ] > > ... libbfd: [ [32mon [m ] > > > > make[1]: *** Deleting file '/home/sfr/next/perf/util/bpf_skel/vmlinux.h' > > libbpf: failed to find '.BTF' ELF section in /boot/vmlinux-6.0.0-5-powerpc64le > > Error: failed to load BTF from /boot/vmlinux-6.0.0-5-powerpc64le: No data available > > make[1]: *** [Makefile.perf:1075: /home/sfr/next/perf/util/bpf_skel/vmlinux.h] Error 195 > > make[1]: *** Waiting for unfinished jobs.... > > make: *** [Makefile.perf:236: sub-make] Error 2 > > Command exited with non-zero status 2 > > > > To be clear this is a native build of perf on a PPC64le host using this > > command line: > > > > make -C tools/perf -f Makefile.perf -s -O -j60 O=../perf EXTRA_CFLAGS=-Wno-psabi > > > > (I could probably remove the EXTRA_CLFAGS now that I am building with > > gcc 12.2) > > > > I don't know which commit caused this. > > > > I have used the perf tree from next-20230316 for today. > > I am still getting this build failure. Hi Stephen, The build failure is intentional as not having BPF skeleton support in the perf tool will remove features. I've just sent: https://lore.kernel.org/lkml/20230322183108.1380882-1-irogers@xxxxxxxxxx/ Which will recommend adding NO_BPF_SKEL=1 to your build options when this failure occurs. I didn't think a features test was appropriate for this as the feature test would basically replicate the vmlinux.h generation and I didn't want to move that support through the build system. Thanks, Ian > -- > Cheers, > Stephen Rothwell
