def preprocess(
        self,
        source,
        output_file=None,
        macros=None,
        include_dirs=None,
        extra_preargs=None,
        extra_postargs=None,
    ):
        """Preprocess a single C/C++ source file, named in 'source'.
        Output will be written to file named 'output_file', or stdout if
        'output_file' not supplied.  'macros' is a list of macro
        definitions as for 'compile()', which will augment the macros set
        with 'define_macro()' and 'undefine_macro()'.  'include_dirs' is a
        list of directory names that will be added to the default list.

        Raises PreprocessError on failure.
        """
        pass
Preprocess a single C/C++ source file, named in 'source'.
        Output will be written to file named 'output_file', or stdout if
        'output_file' not supplied.  'macros' is a list of macro
        definitions as for 'compile()', which will augment the macros set
        with 'define_macro()' and 'undefine_macro()'.  'include_dirs' is a
        list of directory names that will be added to the default list.

        Raises PreprocessError on failure.
        
product/gradle-plugin/src/main/python/setuptools/_distutils/ccompiler.py