This option sets diagnostic messages that have the specified tags to warning severity.
--diag_warning option behaves analogously
--diag_errors, except that the compiler sets the
diagnostic messages having the specified tags to warning severity
rather than error severity.
This option has the
a diagnostic message number to set to warning severity
error, to downgrade the severity of all downgradeable errors to warnings.
--diag_warning=A1234,error causes message
all downgradeable errors to be treated as warnings, providing changing
the severity of
A1234 is permitted.