Re: Building perf with BUILD_BPF_SKEL=1 by default

Song Liu
2021-12-03T19:40:58Z

> On Dec 3, 2021, at 6:23 AM, Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
>
> Em Fri, Dec 03, 2021 at 10:28:00AM -0300, Arnaldo Carvalho de Melo escreveu:
>> Em Fri, Dec 03, 2021 at 10:10:42AM -0300, Arnaldo Carvalho de Melo escreve

[...]

> CLANG /tmp/build/perf/util/bpf_skel/.tmp/bperf_cgroup.bpf.o
> CLANG /tmp/build/perf/util/bpf_skel/.tmp/bperf_follower.bpf.o
> util/bpf_skel/bpf_prog_profiler.bpf.c:18:21: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_perf_event_value'
> __uint(value_size, sizeof(struct bpf_perf_event_value));
> ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> /tmp/build/perf/libbpf/include/bpf/bpf_helpers.h:13:39: note: expanded from macro '__uint'
> #define __uint(name, val) int (*name)[val]
> ^~~
> /tmp/build/perf/libbpf/include/bpf/bpf_helper_defs.h:7:8: note: forward declaration of 'struct bpf_perf_event_value'
> struct bpf_perf_event_value;
> ^
> util/bpf_skel/bpf_prog_profiler.bpf.c:26:21: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_perf_event_value'
> __uint(value_size, sizeof(struct bpf_perf_event_value));
> ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I guess the vmlinux.h fix should also resolve this one?

Thanks,
Song