Build environment for official win32 builds

[Michael Stahl]

On 16/11/12 12:12, Tor Lillqvist wrote:
>>> Is there some specific reason for using MSVC instead of gcc ?
>>
>>  Currently ABI backwards-compatibility for compiled extensions.
> 
> There are also some features in the code that don't compile with
> MinGW. They use API that MinGW does not provide headers for etc.

in addition to above points also there are also open questions around
how we would run unit tests in a MinGW cross-compilation environment and
how well gdb works on Windows; the MSVC C++ debugger is really quite good.