"Bidski" <bidski@bigpond.net.au> writes:
> Can anyone tell me what is going on here?
It seems like you have a pretty nonfunctional build environment :-(
I'm not sure that mingw can be expected to work in 64-bit windows.
The bit with the original libpq.dll not being recognizable might be
worth reporting as a bug. PG's support for 64-bit windows is itself
pretty wet behind the ears, so maybe there's a real problem there.
The other stuff looks like problems with your toolchain to me.
regards, tom lane