Implicit declaration of function 'getaddrinfo' on MinGW

Question

I have a C program that uses getaddrinfo(). It works as expected on Linux and Mac OS X.

I\'m in the middle of porting it to Windows.

When I comp

Answer 1

If you have a look at line 297 of ws2tcpip.h, you can see that there's a check of the value of _WIN32_WINNT.

#if (_WIN32_WINNT >= 0x0501)
void WSAAPI freeaddrinfo (struct addrinfo*);
int WSAAPI getaddrinfo (const char*,const char*,const struct addrinfo*,
                struct addrinfo**);
int WSAAPI getnameinfo(const struct sockaddr*,socklen_t,char*,DWORD,
               char*,DWORD,int);
#else
/* FIXME: Need WS protocol-independent API helpers.  */
#endif

Just #define _WIN32_WINNT before your includes.