On 15/02/2014 23:37, Andres Freund wrote:
On 2014-02-15 17:26:30 -0500, Tom Lane wrote:
Andres Freund <and...@2ndquadrant.com> writes:
On 2014-02-15 22:11:37 +0100, Marco Atzeri wrote:
../../src/timezone/localtime.o ../../src/timezone/strftime.o
../../src/timezone/pgtz.o ../../src/port/libpgport_srv.a
../../src/common/libpgcommon_srv.a -lintl -lssl -lcrypto -lcrypt -lldap -o
libpq/auth.o:auth.c:(.text+0x1940): undefined reference to `in6addr_any'

Could you try additionally linking with -lwsock32?

The interesting question here is why it used to work.  There is no
"extern" for in6addr_any in our code, so there must have been a
declaration of that constant in some system header.  Which one, and
what linkage is it defining, and where was the linkage getting
resolved before?

mingwcompat.c has the following ugly as heck tidbit:

  * MingW defines an extern to this struct, but the actual struct isn't present
  * in any library. It's trivial enough that we can safely define it
  * ourselves.
const struct in6_addr in6addr_any = {{{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
0, 0, 0}}};

I think when that was added the problem might just have been
misanalyzed, but due to the auto import magic this probably wasn't


Andres Freund

on cygwin header in /usr/include

 32 $ grep -rH in6addr_any *
cygwin/in6.h:extern const struct in6_addr in6addr_any;
cygwin/version.h:          in6addr_any, in6addr_loopback.

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