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Re: [PR c++/87137] GCC-8 Fix
On Fri, 31 Aug 2018, Jason Merrill wrote:
> > Anonymous structures and unions are in C11 (and before that a widely
> > accepted extension).
> This isn't an anonymous union, it's named "x1". I don't think that
> line declares a field in C, either.
Indeed, the case where the field has a tag is one of the extensions from
-fms-extensions / -fplan9-extensions, not part of the C11 anonymous struct
/ union feature which requires a struct or union without a tag as the type
of the unnamed field.
Joseph S. Myers