message: Legacy Makefiles: Don't force C++14 with GCC 4.8.
  Bug
diff: # Makefile for building Thrust unit test driver
  -# Force C++14 mode. NVCC will ignore it if the host compiler doesn't support it.
  -export CXX_STD := c++14
  +# Force C++11 mode. NVCC will ignore it if the host compiler doesn't support it.
  +export CXX_STD := c++11
  export CCCL_ENABLE_DEPRECATIONS := 1
  