message: cxx.qt5: Also look in 'lib64'.
diff: @@ -207,7 +207,7 @@ class Qt(drake.Configuration):
  self.__version.major,
  self.__version.minor)))
  tests.append(filename)
  - search_path = [self.__prefix / p for p in ['lib/qt5', 'lib']]
  + search_path = [self.__prefix / lib / p for lib in ['lib', 'lib64'] for p in ['.', 'qt5']]
  prefix, lib = self._search_many_one(tests, search_path)
  if static:
  return drake.cxx.StaticLib(prefix / lib)
  