Suppresses diagnostic messages that have a specific tag.
Behaves analogously to --diag_error, except that the compiler suppresses the diagnostic messages having the specified tags rather than setting them to have Error severity.
This option has the #pragma equivalent #pragma diag_suppress.
Where tag can be:
A diagnostic message number to be suppressed.
error, to suppress all errors that can be downgraded.
warning, to suppress all warnings.