https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836
--- Comment #18 from Martin Sebor <msebor at gcc dot gnu.org> --- The zero size case exists (and is documented) solely as a substitute for flexible array members. Treating is as an ordinary array would disable that extension. It might be appropriate to provide a separate option to control it but conflating it with the other cases (one or more elements) doesn't seem like the robust design. As I mentioned in the review of the Clang change, https://reviews.llvm.org/D126864, so that code bases that use some larger number of elements than zero, such as one, and that can't easily change, can still benefit from the BOS enhancement for the remaining cases, it would be helpful for the new option to accept the minimum number of elements at which a trailing array ceases to be considered a poor-man's flexible array member.
