-LTTNG_HIDDEN
-extern int __lttng_counter_num_possible_cpus;
-LTTNG_HIDDEN
-extern void _lttng_counter_get_num_possible_cpus(void);
+extern int __lttng_counter_num_possible_cpus
+ __attribute__((visibility("hidden")));
+
+extern void _lttng_counter_get_num_possible_cpus(void)
+ __attribute__((visibility("hidden")));