[cfe-dev] How to add a -W flag?

[Chad Rosier]

John,
You need to put it under some type of grouping.  What grouping, I don't know?

As an example, see:
http://llvm.org/viewvc/llvm-project?view=revision&revision=159966

 Chad

> I'm adding a warning to the end of the "Modules Issues" category in
> DiagnosticSemaKinds.td:
>
> def warn_need_module_import : Warning<
>   "Use of identifier '%0' requires import/inclusion of the module '%1'">;
>
> This makes test/Misc/warning-flags.c fail.
>
> A comment in that test file says:
>
>     If you add a new warning without a flag, this test will fail.  To fix
>     this test, simply add a warning group to that warning.
>
> I don't know what that means.  How do I add a warning group to the
> warning?
>
> Thanks.
>
> -John
>
>
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