in pathconf, -1, not 0, means unsupported.. syncio presumably works, too.
[musl] / src / mq / mq_close.c
1 #include <mqueue.h>
2 #include "syscall.h"
3
4 int mq_close(mqd_t mqd)
5 {
6         return syscall(SYS_close, mqd);
7 }