[PATCH] perf data: don't mention --to-ctf if it's not supported

[Mahmoud Abumandour <ma.mandourr@gmail.com>]

From: Mahmoud Mandour <ma.mandourr@gmail.com>

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>
---
 tools/perf/builtin-data.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
index b7f9dc85a407..c22d82d2a73c 100644
--- 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);
-- 
2.30.2