• Wang Nan's avatar
    perf tools: Make perf depend on libbpf · ed63f34c
    Wang Nan authored
    By adding libbpf into perf's Makefile, this patch enables perf to build
    libbpf if libelf is found and neither NO_LIBELF nor NO_LIBBPF is set.
    
    The newly introduced code is similar to how libapi and libtraceevent
    are wired into Makefile.perf.
    
    MANIFEST is also updated for 'make perf-*-src-pkg'.
    
    Append make_no_libbpf to tools/perf/tests/make.
    
    The 'bpf' feature check is appended into default FEATURE_TESTS and
    FEATURE_DISPLAY, so perf will check the API version of bpf in
    /path/to/kernel/include/uapi/linux/bpf.h. Which should not fail except
    when we are trying to port this code to an old kernel.
    
    Error messages are also updated to notify users about the lack of BPF
    support in 'perf record' if libelf is missing or the BPF API check
    failed.
    
    tools/lib/bpf is added to TAG_FOLDERS to allow us to navigate libbpf
    files when working on perf using tools/perf/tags.
    Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
    Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
    Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
    Cc: Daniel Borkmann <daniel@iogearbox.net>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: He Kuang <hekuang@huawei.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Kaixu Xia <xiakaixu@huawei.com>
    Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Zefan Li <lizefan@huawei.com>
    Cc: pi3orama@163.com
    Link: http://lkml.kernel.org/r/1444826502-49291-2-git-send-email-wangnan0@huawei.com
    [ Document NO_LIBBPF in Makefile.perf, noted by Jiri Olsa ]
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    ed63f34c
MANIFEST 2.62 KB