Message 121244 - Python tracker

> But different build system make new plaform!
Maybe, but not a new "sys.platform".

VC6 and VS9.0 don't share any project file for the compilation; but they both build a sys.platform=='win32'.
Distutils has to use another way to make the difference and choose the right compiler (in distutils.mscvcompiler.get_build_version())