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        the full name of the extension, including any packages -- ie.
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      sources : [string]
        list of source filenames, relative to the distribution root
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      include_dirs : [string]
        list of directories to search for C/C++ header files (in Unix
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      define_macros : [(name : string, value : string|None)]
        list of macros to define; each macro is defined using a 2-tuple,
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      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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        any extra platform- and compiler-specific information to use
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        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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