I think the answer to that lies in something I didn't notice from your first post:

Note (probably harmless): No library found for -lblpapi3_32

libblpapi3_32.a is being sought (presumably for the purpose of resolving those references) but can't be found.

If you don't have that file you can create it from the Bloomberg dll - using gendef and dlltool as detailed here.
dlltool should have come with your compiler. If gendef is not also provided, you might have to google for it.
Then it's just a matter of placing your libblpapi3_32.a where it is automatically located. Or you can set the CPATH environment variable to point to its location - something like:

set CPATH=C:\library\location;%CPATH%
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You'll then need to perform a fresh build.

Cheers,
Rob

Update: spelling out the gendef and dlltool commands (assuming the Bloomberg dll is called bl.dll - which may or may not be the case):

gendef bl.dll
dlltool --kill-at --input-def bl.def --output-lib libblpapi3_32.a
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