old_contents: #-----------------------------------------------------------------
  # pycparser: func_defs.py
  #
  # Using pycparser for printing out all the functions defined in a
  # C file.
  #
  # This is a simple example of traversing the AST generated by
  # pycparser.
  #
  # Copyright (C) 2008-2015, Eli Bendersky
  # License: BSD
  #-----------------------------------------------------------------
  from __future__ import print_function
  import sys
  
  # This is not required if you've installed pycparser into
  # your site-packages/ with setup.py
  sys.path.extend(['.', '..'])
  
  from pycparser import c_parser, c_ast, parse_file
  
  
  # A simple visitor for FuncDef nodes that prints the names and
  # locations of function definitions.
  class FuncDefVisitor(c_ast.NodeVisitor):
      def visit_FuncDef(self, node):
          print('%s at %s' % (node.decl.name, node.decl.coord))
  
  
  def show_func_defs(filename):
      # Note that cpp is used. Provide a path to your own cpp or
      # make sure one exists in PATH.
      ast = parse_file(filename, use_cpp=True)
  
      v = FuncDefVisitor()
      v.visit(ast)
  
  
  if __name__ == "__main__":
      if len(sys.argv) > 1:
          filename  = sys.argv[1]
      else:
          filename = 'examples/c_files/memmgr.c'
  
      show_func_defs(filename)
  
new_contents: #-----------------------------------------------------------------
  # pycparser: func_defs.py
  #
  # Using pycparser for printing out all the functions defined in a
  # C file.
  #
  # This is a simple example of traversing the AST generated by
  # pycparser. Call it from the root directory of pycparser.
  #
  # Copyright (C) 2008-2015, Eli Bendersky
  # License: BSD
  #-----------------------------------------------------------------
  from __future__ import print_function
  import sys
  
  # This is not required if you've installed pycparser into
  # your site-packages/ with setup.py
  sys.path.extend(['.', '..'])
  
  from pycparser import c_parser, c_ast, parse_file
  
  
  # A simple visitor for FuncDef nodes that prints the names and
  # locations of function definitions.
  class FuncDefVisitor(c_ast.NodeVisitor):
      def visit_FuncDef(self, node):
          print('%s at %s' % (node.decl.name, node.decl.coord))
  
  
  def show_func_defs(filename):
      # Note that cpp is used. Provide a path to your own cpp or
      # make sure one exists in PATH.
      ast = parse_file(filename, use_cpp=True,
                       cpp_args=r'-Iutils/fake_libc_include')
  
      v = FuncDefVisitor()
      v.visit(ast)
  
  
  if __name__ == "__main__":
      if len(sys.argv) > 1:
          filename  = sys.argv[1]
      else:
          filename = 'examples/c_files/memmgr.c'
  
      show_func_defs(filename)
  
subject: Add fake libc path to func_defs.py