Updateing code to swift 4 results in an error message

Question

I wan to update this code to swift 4:

rc = select(socket_fd + 1, readfd, writefd, NULL, &timeout);

return rc;
  }

But I get two errors:

Declaration of 'select' must be imported from module 'Darwin.POSIX.sys.time' before it is required
Implicit declaration of function 'select' is invalid in C99

How can I can fix this?

Answer 1

Add this near the top of your file:

#include <sys/time.h>