Use -v as the first option to enable verbose mode which will show source
input, extracted symbol and line info. For example:
Source: ./../include/curl/typecheck-gcc.h
Symbol: curlcheck_socket_info(info)
Line #423: #define curlcheck_socket_info(info) \
Ref: https://curl.se/mail/lib-2020-12/0084.html
Closes https://github.com/curl/curl/pull/6349
