code: def generate(env):
      
      path, _cc, version = get_xlc(env)
      if path and _cc:
          _cc = os.path.join(path, _cc)
  
      if 'CC' not in env:
          env['CC'] = _cc
  
      cc.generate(env)
  
      if version:
          env['CCVERSION'] = version
docs: Add Builders and construction variables for xlc / Visual Age
      suite to an Environment.