check_c_source_compiles("
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
int
main(int argc, char *argv[])
{
	int fd = 0, val = 1, rv;
	socklen_t valLen = sizeof(val);
	rv = setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, &val, valLen);
	return (rv != 0);
}
" HAVE_SO_OOBINLINE)