[PATCH 1/1 perf-tools] perf python: Fix up the build on architectures without HAVE_KVM_STAT_SUPPORT

From: Arnaldo Carvalho de Melo
Date: Wed Oct 23 2024 - 17:05:16 EST


Noticed while building on a raspbian arm 32-bit system.

There was also this other case, fixed by adding a missing util/stat.h
with the prototypes:

/tmp/tmp.MbiSHoF3dj/perf-6.12.0-rc3/tools/perf/util/python.c:1396:6: error: no previous prototype for ‘perf_stat__set_no_csv_summary’ [-Werror=missing-prototypes]
1396 | void perf_stat__set_no_csv_summary(int set __maybe_unused)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/tmp.MbiSHoF3dj/perf-6.12.0-rc3/tools/perf/util/python.c:1400:6: error: no previous prototype for ‘perf_stat__set_big_num’ [-Werror=missing-prototypes]
1400 | void perf_stat__set_big_num(int set __maybe_unused)
| ^~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

In other architectures this must be building due to some lucky indirect
inclusion of that header.

Fixes: 9dabf4003423c8d3 ("perf python: Switch module to linking libraries from building source")
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/python.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 31a223eaf8e65fa3..ee3d43a7ba4570f0 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -19,6 +19,7 @@
#include "util/bpf-filter.h"
#include "util/env.h"
#include "util/kvm-stat.h"
+#include "util/stat.h"
#include "util/kwork.h"
#include "util/sample.h"
#include "util/lock-contention.h"
@@ -1355,6 +1356,7 @@ PyMODINIT_FUNC PyInit_perf(void)

unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;

+#ifdef HAVE_KVM_STAT_SUPPORT
bool kvm_entry_event(struct evsel *evsel __maybe_unused)
{
return false;
@@ -1384,6 +1386,7 @@ void exit_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
char *decode __maybe_unused)
{
}
+#endif // HAVE_KVM_STAT_SUPPORT

int find_scripts(char **scripts_array __maybe_unused, char **scripts_path_array __maybe_unused,
int num __maybe_unused, int pathlen __maybe_unused)
--
2.46.0