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This option sets diagnostic messages that have the specified tags to warning severity.

The --diag_warning option behaves analogously to --diag_error, except that the compiler sets the diagnostic messages having the specified tags to warning severity rather than error severity.


This option has the #pragma equivalent #pragma diag_warning.



Where tag can be:

  • a diagnostic message number to set to warning severity

  • error, to downgrade the severity of all downgradable errors to warnings.


--diag_warning=A1234,error causes message A1234 and all downgradable errors to be treated as warnings, providing changing the severity of A1234 is permitted.