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()'
(self, source, output_file=None, macros=None,
include_dirs=None, extra_preargs=None, extra_postargs=None)
source not stored for this graph (policy: none)