Re: [PATCH v2 4/4] perf: Support perf -vv

Jiri Olsa
2018-03-28T13:22:56Z

On Wed, Mar 28, 2018 at 10:57:08PM +0800, Jin Yao wrote:
> We keep having bug reports that when users build perf on their own,
> but they don't install some needed libraries such as libelf,
> libbfd/libibery.
>
> The perf can build, but it is missing important functionality.
>
> This patch provides a new option '-vv' which will print the
> compiled-in status of libraries.
>
> The 'perf -vv' is equal to 'perf -version --build-options'.
>
> For example:
>
> $ ./perf -vv or ./perf -version --build-options
> perf version 4.13.rc5.gcb1183
> dwarf: [ on ]
> dwarf_getlocations: [ on ]
> glibc: [ on ]
> gtk2: [ on ]
> libaudit: [ OFF ]
> libbfd: [ on ]
> libelf: [ on ]
> libnuma: [ on ]
> numa_num_possible_cpus: [ on ]
> libperl: [ on ]
> libpython: [ on ]
> libslang: [ on ]
> libcrypto: [ on ]
> libunwind: [ on ]
> libdw-dwarf-unwind: [ on ]
> zlib: [ on ]
> lzma: [ on ]
> get_cpuid: [ on ]
> bpf: [ on ]
> [ on ]: library is compiled-in
> [ OFF ]: library is disabled in make configuration
> OR library is not installed in build environment
>
> v2:
> ---
> Use a global variable version_verbose to count the number of 'v'.
>
> Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
> ---
> tools/perf/perf.c | 22 ++++++++++++++++++----
> tools/perf/perf.h | 1 +
> 2 files changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> index 1b3fc8e..355219e 100644
> --- a/tools/perf/perf.c
> +++ b/tools/perf/perf.c
> @@ -32,7 +32,7 @@
> #include <linux/kernel.h>
>
> const char perf_usage_string[] =
> - "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]";
> + "perf [--version [--build-options]] [--help] [OPTIONS] COMMAND [ARGS]";

--build-options is 'perf version' option no?

jirka