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Subject[PATCH v1 3/3] perf: Support perf -vv
Date
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.

For example:

$ ./perf -vv
perf version 4.13.rc5.g9b7a81b
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 ]

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/perf.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 1b3fc8e..300c83d 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -64,6 +64,7 @@ static struct cmd_struct commands[] = {
{ "top", cmd_top, 0 },
{ "annotate", cmd_annotate, 0 },
{ "version", cmd_version, 0 },
+ { "version2", cmd_version2, 0 },
{ "script", cmd_script, 0 },
{ "sched", cmd_sched, 0 },
#ifdef HAVE_LIBELF_SUPPORT
@@ -190,6 +191,11 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
break;
}

+ if (!strcmp(cmd, "-vv")) {
+ (*argv)[0] = "--version2";
+ break;
+ }
+
/*
* Check remaining flags.
*/
--
2.7.4
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