message: ENH: explicitly turn on const memory for umpire
  Umpire now requires to explicitly turn on const device memory.
diff: @@ -41,6 +41,7 @@ class Umpire(CMakePackage):
  if '+cuda' in spec:
  options.extend([
  '-DENABLE_CUDA=On',
  + '-DENABLE_DEVICE_CONST=On',
  '-DCUDA_TOOLKIT_ROOT_DIR=%s' % (spec['cuda'].prefix)])
  else:
  options.append('-DENABLE_CUDA=Off')
  