Original Translation
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Let's examine each of the fields in turn.
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*module* is the name of the extension module to be built, and should be a valid Python identifier. You can't just change this in order to rename a module (edits to the source code would also be needed), so this should be left alone.
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*sourcefile* is anything that's likely to be a source code file, at least judging by the filename. Filenames ending in :file:`.c` are assumed to be written in C, filenames ending in :file:`.C`, :file:`.cc`, and :file:`.c++` are assumed to be C++, and filenames ending in :file:`.m` or :file:`.mm` are assumed to be in Objective C.
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*cpparg* is an argument for the C preprocessor, and is anything starting with :option:`-I`, :option:`-D`, :option:`-U` or :option:`-C`.
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*library* is anything ending in :file:`.a` or beginning with :option:`-l` or :option:`-L`.
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If a particular platform requires a special library on your platform, you can add it by editing the :file:`Setup` file and running ``python setup.py build``. For example, if the module defined by the line ::
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foo foomodule.c
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must be linked with the math library :file:`libm.a` on your platform, simply add :option:`-lm` to the line::
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foo foomodule.c -lm
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Arbitrary switches intended for the compiler or the linker can be supplied with the :option:`-Xcompiler` *arg* and :option:`-Xlinker` *arg* options::