Suppressing an nvcc warning message: explicit enum base types

I’m compiling some CUDA kernel code which triggers the following error:

/some/path/blah.cu (555): warning: explicit enum base types are a C++11 feature

Now, I know I can suppress nvcc warning messages by message type, as in the following example:

--diag_suppress=initialization_not_reachable

However, I can’t find a table mapping warning messages to shorthands I can use on the command-line. So, what is the code for the enum base types warning? And where can I find codes for other warnings?