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include(CheckCSourceRuns)
check_c_source_runs(
"
#include <sys/types.h>
#include <sys/time.h>
#include <sys/event.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
int
main(int argc, char **argv)
{
int kq;
int n;
int fd[2];
struct kevent ev;
struct timespec ts;
char buf[8000];
if (pipe(fd) == -1)
exit(1);
if (fcntl(fd[1], F_SETFL, O_NONBLOCK) == -1)
exit(1);
while ((n = write(fd[1], buf, sizeof(buf))) == sizeof(buf))
;
if ((kq = kqueue()) == -1)
exit(1);
memset(&ev, 0, sizeof(ev));
ev.ident = fd[1];
ev.filter = EVFILT_WRITE;
ev.flags = EV_ADD | EV_ENABLE;
n = kevent(kq, &ev, 1, NULL, 0, NULL);
if (n == -1)
exit(1);
read(fd[0], buf, sizeof(buf));
ts.tv_sec = 0;
ts.tv_nsec = 0;
n = kevent(kq, NULL, 0, &ev, 1, &ts);
if (n == -1 || n == 0)
exit(1);
exit(0);
}
" EVENT__HAVE_WORKING_KQUEUE)
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