Re: narwhal and PGDLLIMPORT

On 2014-02-15 17:26:30 -0500, Tom Lane wrote:
> Andres Freund <andres@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
> >> 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
thatwe 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/PostgreSQL Development, 24x7 Support, Training &
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