code: def generate(env):
      
      path, _cxx, version = get_xlc(env)
      if path and _cxx:
          _cxx = os.path.join(path, _cxx)
  
      if 'CXX' not in env:
          env['CXX'] = _cxx
  
      cplusplus.generate(env)
  
      if version:
          env['CXXVERSION'] = version
docs: Add Builders and construction variables for xlC / Visual Age
      suite to an Environment.