Windows Python is built in Microsoft Visual C++; using other
compilers may or may not work (though Borland seems to). The rest of
this section is MSVC++ specific.
When creating DLLs in Windows, you must pass pythonXY.lib to
the linker. To build two DLLs, spam and ni (which uses C functions
found in spam), you could use these commands:
The first command created three files: spam.obj,
spam.dll and spam.lib. Spam.dll does not contain
any Python functions (such as PyArg_ParseTuple()), but it
does know how to find the Python code thanks to pythonXY.lib.
The second command created ni.dll (and .obj and
.lib), which knows how to find the necessary functions from
spam, and also from the Python executable.
Not every identifier is exported to the lookup table. If you want any
other modules (including Python) to be able to see your identifiers,
you have to say "_declspec(dllexport)", as in "void
_declspec(dllexport) initspam(void)" or "PyObject
_declspec(dllexport) *NiGetSpamData(void)".
Developer Studio will throw in a lot of import libraries that you do
not really need, adding about 100K to your executable. To get rid of
them, use the Project Settings dialog, Link tab, to specify
ignore default libraries. Add the correct
msvcrtxx.lib to the list of libraries.
