[components][libc] add extern "C" for header file
#define __PTHREAD_H__
#include <rtthread.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
#include <posix_types.h>
#include <sched.h>
@@ -262,4 +267,8 @@ int pthread_barrier_init(pthread_barrier_t *barrier,
int pthread_barrier_wait(pthread_barrier_t *barrier);
+#ifdef __cplusplus
+}
+#endif
+
#endif
