perf evlist: Pass the event_group info via perf_attr_details

So that we avoid dragging symbol.o into the python binding.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-izjubje7ltd1srji5wb0ygwi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-evlist.c

@@ -39,7 +39,7 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
 	OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
 	OPT_BOOLEAN('v', "verbose", &details.verbose,
 		    "Show all event attr details"),
-	OPT_BOOLEAN('g', "group", &symbol_conf.event_group,
+	OPT_BOOLEAN('g', "group", &details.event_group,
 		    "Show event group information"),
 	OPT_END()
 	};
@@ -52,7 +52,7 @@ int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (argc)
 		usage_with_options(evlist_usage, options);
 
-	if (symbol_conf.event_group && (details.verbose || details.freq)) {
+	if (details.event_group && (details.verbose || details.freq)) {
 		pr_err("--group option is not compatible with other options\n");
 		usage_with_options(evlist_usage, options);
 	}

tools/perf/util/evsel.c

@@ -1391,7 +1391,7 @@ int perf_evsel__fprintf(struct perf_evsel *evsel,
 	bool first = true;
 	int printed = 0;
 
-	if (symbol_conf.event_group) {
+	if (details->event_group) {
 		struct perf_evsel *pos;
 
 		if (!perf_evsel__is_group_leader(evsel))

tools/perf/util/evsel.h

@@ -254,6 +254,7 @@ static inline bool perf_evsel__is_group_leader(const struct perf_evsel *evsel)
 struct perf_attr_details {
 	bool freq;
 	bool verbose;
+	bool event_group;
 };
 
 int perf_evsel__fprintf(struct perf_evsel *evsel,