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        the full name of the extension, including any packages -- ie.
        *not* a filename or pathname, but Python dotted name
      sources : [string]
        list of source filenames, relative to the distribution root
        (where the setup script lives), in Unix form (slash-separated)
        for portability.  Source files may be C, C++, SWIG (.i),
        platform-specific resource files, or whatever else is recognized
        by the "build_ext" command as source for a Python extension.
      include_dirs : [string]
        list of directories to search for C/C++ header files (in Unix
        form for portability)
      define_macros : [(name : string, value : string|None)]
        list of macros to define; each macro is defined using a 2-tuple,
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        FOO" in source or -DFOO on Unix C compiler command line)
      undef_macros : [string]
        list of macros to undefine explicitly
      library_dirs : [string]
        list of directories to search for C/C++ libraries at link time
      libraries : [string]
        list of library names (not filenames or paths) to link against
      runtime_library_dirs : [string]
        list of directories to search for C/C++ libraries at run time
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      extra_objects : [string]
        list of extra files to link with (eg. object files not implied
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        binary resource files, etc.)
      extra_compile_args : [string]
        any extra platform- and compiler-specific information to use
        when compiling the source files in 'sources'.  For platforms and
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      extra_link_args : [string]
        any extra platform- and compiler-specific information to use
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      export_symbols : [string]
        list of symbols to be exported from a shared extension.  Not
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        extensions, which typically export exactly one symbol: "init" +
        extension_name.
      swig_opts : [string]
        any extra options to pass to SWIG if a source file has the .i
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      depends : [string]
        list of files that the extension depends on
      language : string
        extension language (i.e. "c", "c++", "objc"). Will be detected
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      optional : boolean
        specifies that a build failure in the extension should not abort the
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