>> src/include/pg_config.h.win32
>> /* Define to 1 if you have support for IPv6. */
>> // #define HAVE_IPV6 1
>>
>> What do you think?
>
> It's defined ni the msvc build script, see
> http://archives.postgresql.org/pgsql-committers/2007-04/msg00148.php
It is a meaning with win32.mak. Then, It is the outside of the msvc tool.
Regards,
Hiroshi Saito