2005, Professional Edition, and Visual Studio .NET 2008, Express
Edition. Other configurations may work as well.
+The translation scripts will set up the appropriate environment variables
+for the compiler. They will attempt to locate the same compiler version that
+was used to build the Python interpreter doing the
+translation. Failing that, they will pick the most recent Visual Studio
+compiler they can find. In addition, the target architecture
+(32 bits, 64 bits) is automatically selected. A 32 bit build can only be built
+using a 32 bit Python and vice versa.
+**Note:** PyPy is currently not supported for 64 bit Windows, and translation
+will be aborted in this case.
The compiler is all you need to build pypy-c, but it will miss some
modules that relies on third-party libraries. See below how to get