Fix sigset_t not found in liburing.h
#ifndef LIB_URING_H
#define LIB_URING_H
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 500 /* Required for glibc to expose sigset_t */
+#endif
+
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/stat.h>
