Hi,
couple of weeks ago postgresql introduced support for mingw-w64 compiler on
MS Windows platform; however the related patch was based on assumption that
mingw-w64 project delivers just 64bit compiler (which is not true - they
deliver both 32/64bit compilers).
According to my testing - postgresql-9.0.4 does compile fine with 64bit
mingw-w64 but fails with 32-bit mingw-w64 compiler.
Try to have a look at the enclosed patch which makes it possible to compile
postgresql-9.0.4 with 32bit mingw-w64.
--
kmx