yuangongji 6d54be2cc0 autoconf: fix getaddrinfo checking errors on mingw
`AC_CHECK_FUNCS` can not properly check `getaddrinfo` because this
function requires some special headers on mingw.
Using `AC_CHECK_DECL` can effectively solve this issue.

Same for
- getnameinfo
- getprotobynumber
- getservbyname
- inet_ntop
- inet_pton
2020-03-17 21:43:05 +03:00
..