Captive portal for cc3220- inet_addr declared implicitly

#1
  1. My goal is:to Add captive portal stack for wifi provisioning to cc3220
  2. My actions are: downloaded example captive portal stack code and built using mos tool
  3. The result I see is: Gettig error - inet_addr declared implicitly
  4. My expectation & question is: which file i need to add to remove this error?
    where is the function inet_addr declared?

Regards,
Sanath Rai