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

Chad Rosier mcrosier at codeaurora.org
Fri Jan 31 11:45:02 PST 2014

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

As an example, see:


> 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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