code: def do_include(self, t):
          
          t = self.resolve_include(t)
          include_file = self.find_include_file(t)
          if include_file:
              #print("include_file =", include_file)
              self.result.append(include_file)
              contents = self.read_file(include_file)
              new_tuples = [('scons_current_file', include_file)] + \
                           self.tupleize(contents) + \
                           [('scons_current_file', self.current_file)]
              self.tuples[:] = new_tuples + self.tuples
docs: Default handling of a #include line.