- Python 3.7 is built using Visual Studio 2017 so we use the corresponding image.
- Python 3.7 replaces Python 2.7 when building the module.
- Adding the library legacy_stdio_definitions to the linker input as starting with VS 2015 some symbols have been inlined but may be expected by older binaries. This compatibility library exposes these symbols so they can be dynamically linked when required (Cf. https://stackoverflow.com/a/32418900).
Same macro name is used in both natpmp and miniupnp libraries so it's
impossble to link one statically and another dynamically. This patch
renames the macro to have library-specific name.
Nathan Richard
Thomas Bernard
Mike Gelfand