On 02/16/2014 07:03 AM, Andres Freund wrote: > On 2014-02-15 17:48:00 -0500, Tom Lane wrote: >> Marco Atzeri <marco.atz...@gmail.com> writes: >>> 32 $ grep -rH in6addr_any * >>> cygwin/in6.h:extern const struct in6_addr in6addr_any; >>> cygwin/version.h: in6addr_any, in6addr_loopback. >> >> So how come there's a declspec on the getopt.h variables, but not this >> one? > > Well, those are real constants, so they probably are fully contained in > the static link library, no need to dynamically resolve them.
If they're externs that're then defined in a single module, that's not the case. Only if they're *not* declared extern, and thus added to each compilation unit then de-duplicated during linking, may they be safely referred to without a __declspec(dllimport) because each module gets its own copy. -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers