erichkeane wrote:
> > There are currently over 200 separate unions using the work-around.
>
> Specifically, this is what Linux uses for getting C99 flexible arrays in
> unions and alone in structs:
>
> ```
> #define DECLARE_FLEX_ARRAY(TYPE, NAME) \
> struct { \
> struct { } __empty_ ## NAME; \
> TYPE NAME[]; \
> }
> ```
>
> The conversion (over 6 years) from the "struct hack" to C99 flexible arrays
> is complete, except for this wart.
That one ends up not being a problem, but presumably you are wanting to change
that top-level 'struct' to be a 'union'? What is the problem with making it
`TYPE NAME[0];` ?
https://github.com/llvm/llvm-project/pull/84428
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