wait4.c\linux\src - musl - musl - an implementation of the standard library for Linux-based systems

#define _GNU_SOURCE
#include <sys/wait.h>
#include <sys/resource.h>
#include "syscall.h"
pid_t wait4(pid_t pid, int *status, int options, struct rusage *usage)
{
	return syscall(SYS_wait4, pid, status, options, usage);
}