perf data: Don't mention --to-ctf if it's not supported

The option `--to-ctf` is only available when perf has libbabeltrace
support. Hence, on error, we shouldn't state that user must include
`--to-ctf` unless it's supported.

The only user-visible change for this commit is that when `perf` is not
configured to support libbabeltrace, the user is only prompted to
provide the `--to-json` option instead of bothe `--to-json` and
`--to-ctf`.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220220113952.138280-1-ma.mandourr@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
index b7f9dc8..c22d82d 100644 (file)
--- a/tools/perf/builtin-data.c
+++ b/tools/perf/builtin-data.c
@@ -62,10 +62,17 @@ static int cmd_data_convert(int argc, const char **argv)
                pr_err("You cannot specify both --to-ctf and --to-json.\n");
                return -1;
        }
+#ifdef HAVE_LIBBABELTRACE_SUPPORT
        if (!to_json && !to_ctf) {
                pr_err("You must specify one of --to-ctf or --to-json.\n");
                return -1;
        }
+#else
+       if (!to_json) {
+               pr_err("You must specify --to-json.\n");
+       return -1;
+}
+#endif
 
        if (to_json)
                return bt_convert__perf2json(input_name, to_json, &opts);