void bt_lib_log(const char *func, const char *file, unsigned line,
int lvl, const char *tag, const char *fmt, ...);
+void bt_lib_log_v(const char *func, const char *file, unsigned line,
+ int lvl, const char *tag, const char *fmt, va_list *args);
+
#define BT_LIB_LOG_AND_APPEND(_lvl, _fmt, ...) \
do { \
bt_lib_maybe_log_and_append_cause( \