[no%]diags

[Do not] Print the command line for each compilation pass. 

[no%]template

[Do not] Turn on the template instantiation verbose mode (sometimes called the “verify” mode). The verbose mode displays each phase of instantiation as it occurs during compilation.

[no%]version

[Do not] Direct the CC driver to print the names and version numbers of the programs it invokes.

%all

Invokes all of the above. 

%none

-verbose=%none is the same as -verbose=no%template,no%diags,no%version.