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Subject[PATCH v4 4/6] perf version: Print the compiled-in status of libraries
Date
This patch checks the values passed by CFLAGS (-DHAVE_XXX) and then
print the status of libraries.

For example, if HAVE_DWARF_SUPPORT is defined, that means the
library "dwarf" is compiled-in. The patch will print the status
"on" for this library otherwise it print the status "OFF".

A new option '--build-options' created for 'perf version' supports
the printing of library status.

For example:

$ ./perf version --build-options
or
./perf --version --build-options
or
./perf -v --build-options

perf version 4.13.rc5.g6727c5
dwarf: [ on ] # HAVE_DWARF_SUPPORT
dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT
glibc: [ on ] # HAVE_GLIBC_SUPPORT
gtk2: [ on ] # HAVE_GTK2_SUPPORT
libaudit: [ OFF ] # HAVE_LIBAUDIT_SUPPORT
libbfd: [ on ] # HAVE_LIBBFD_SUPPORT
libelf: [ on ] # HAVE_LIBELF_SUPPORT
libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT
numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT
libperl: [ on ] # HAVE_LIBPERL_SUPPORT
libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT
libslang: [ on ] # HAVE_SLANG_SUPPORT
libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT
libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT
libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT
zlib: [ on ] # HAVE_ZLIB_SUPPORT
lzma: [ on ] # HAVE_LZMA_SUPPORT
get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT
bpf: [ on ] # HAVE_LIBBPF_SUPPORT

v4:
---
1. Also print the macro name. That would make it easier
to grep around in the source looking for where code
related a particular features is located.

2. Update since HAVE_DWARF_GETLOCATIONS is renamed to
HAVE_DWARF_GETLOCATIONS_SUPPORT

v3:
---
Remove following unnecessary help message.

1. [ on ]: library is compiled-in
[ OFF ]: library is disabled in make configuration
OR library is not installed in build environment

2. Create '--build-options' option.

3. Use standard option parsing API 'parse_options'.

v2:
---
1. Use IS_BUILTIN macro to replace #ifdef/#endif block.

2. Print color for on/OFF.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/builtin-version.c | 82 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 81 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-version.c b/tools/perf/builtin-version.c
index 37019c5..2abe391 100644
--- a/tools/perf/builtin-version.c
+++ b/tools/perf/builtin-version.c
@@ -1,11 +1,91 @@
// SPDX-License-Identifier: GPL-2.0
#include "builtin.h"
#include "perf.h"
+#include "color.h"
#include <linux/compiler.h>
+#include <tools/config.h>
#include <stdio.h>
+#include <string.h>
+#include <subcmd/parse-options.h>

-int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused)
+int version_verbose;
+
+struct version {
+ bool build_options;
+};
+
+static struct version version;
+
+static struct option version_options[] = {
+ OPT_BOOLEAN(0, "build-options", &version.build_options,
+ "display the build options"),
+};
+
+static const char * const version_usage[] = {
+ "perf version [<options>]",
+ NULL
+};
+
+static void on_off_print(const char *status)
+{
+ printf("[ ");
+
+ if (!strcmp(status, "OFF"))
+ color_fprintf(stdout, PERF_COLOR_RED, "%-3s", status);
+ else
+ color_fprintf(stdout, PERF_COLOR_GREEN, "%-3s", status);
+
+ printf(" ]");
+}
+
+static void status_print(const char *name, const char *macro,
+ const char *status)
{
+ printf("%22s: ", name);
+ on_off_print(status);
+ printf(" # %s\n", macro);
+}
+
+#define STATUS(__d, __m) \
+do { \
+ if (IS_BUILTIN(__d)) \
+ status_print(#__m, #__d, "on"); \
+ else \
+ status_print(#__m, #__d, "OFF"); \
+} while (0)
+
+static void library_status(void)
+{
+ STATUS(HAVE_DWARF_SUPPORT, dwarf);
+ STATUS(HAVE_DWARF_GETLOCATIONS_SUPPORT, dwarf_getlocations);
+ STATUS(HAVE_GLIBC_SUPPORT, glibc);
+ STATUS(HAVE_GTK2_SUPPORT, gtk2);
+ STATUS(HAVE_LIBAUDIT_SUPPORT, libaudit);
+ STATUS(HAVE_LIBBFD_SUPPORT, libbfd);
+ STATUS(HAVE_LIBELF_SUPPORT, libelf);
+ STATUS(HAVE_LIBNUMA_SUPPORT, libnuma);
+ STATUS(HAVE_LIBNUMA_SUPPORT, numa_num_possible_cpus);
+ STATUS(HAVE_LIBPERL_SUPPORT, libperl);
+ STATUS(HAVE_LIBPYTHON_SUPPORT, libpython);
+ STATUS(HAVE_SLANG_SUPPORT, libslang);
+ STATUS(HAVE_LIBCRYPTO_SUPPORT, libcrypto);
+ STATUS(HAVE_LIBUNWIND_SUPPORT, libunwind);
+ STATUS(HAVE_DWARF_SUPPORT, libdw-dwarf-unwind);
+ STATUS(HAVE_ZLIB_SUPPORT, zlib);
+ STATUS(HAVE_LZMA_SUPPORT, lzma);
+ STATUS(HAVE_AUXTRACE_SUPPORT, get_cpuid);
+ STATUS(HAVE_LIBBPF_SUPPORT, bpf);
+}
+
+int cmd_version(int argc, const char **argv)
+{
+ argc = parse_options(argc, argv, version_options, version_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+
printf("perf version %s\n", perf_version_string);
+
+ if (version.build_options || version_verbose == 1)
+ library_status();
+
return 0;
}
--
2.7.4
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