Any chance you could help with the following error during compilation?
This is under centos 6 and gcc 8.3.1

util.c: In function ‘send_line’:
util.c:1136:15: error: ‘sock’ undeclared (first use in this function); did you mean ‘work’?
      n = send(sock, s + sent, len, 0);
               ^~~~
               work
util.c:1136:15: note: each undeclared identifier is reported only once for each function it appears in