Proposal:Use PGDLLEXPORT for libpq

Hello hackers.
Why we do not use PGDLLEXPORT (__declspec (dllexport)) for the libpq (and
other dlls)?
Now we are using black magic with gendef.pl for get def (aka export.txt)
from .obj files.
I have set for some functions and it works.
Perhaps there is a circumstance that I do not know but my version seems to
me simplify build under Windows.

Thanks.
--
Yury Zhuravlev
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company