Ok, after digging once more into the problem I decided to use a Windows 7/32 machine.
The built worked effortless!! A very nice run.

Back to a Windows 7/64, I'm still having troubles.
Some of the issue seems related to gawk while building libsofia_sip
And it seems that once the issue occurs, you're stuck with the built....

In any case please note the following remarks:

1) if you uses Windows sdk 7.1

edit fake-rfc2533.h and comment out :

#ifdef nodef // *****add this
#ifndef HAVE_STRUCT_ADDRINFO

struct addrinfo {
int ai_flags; /* AI_PASSIVE, AI_CANONNAME */
int ai_family; /* PF_xxx */
int ai_socktype; /* SOCK_xxx */
int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
size_t ai_addrlen; /* length of ai_addr */
char *ai_canonname; /* canonical name for hostname */
struct sockaddr *ai_addr; /* binary address */
struct addrinfo *ai_next; /* next structure in linked list */
};
#endif /* !HAVE_STRUCT_ADDRINFO */

#endif // *****add this

2) in sofia_presence.c
if (mod_sofia_globals.debug_presence > 1) {
int i; // to be added
for (i = 0; i < argc; i++) {