Re: narwhal and PGDLLIMPORT

On 2014-02-15 17:26:30 -0500, Tom Lane wrote:
> Andres Freund <andres(at)2ndquadrant(dot)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
> >> postgres
> >> 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:

#ifndef WIN32_ONLY_COMPILER
/*
* 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
noticed...

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
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