https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109021
--- Comment #6 from Martin Uecker <muecker at gwdg dot de> --- Note that I do not propose to add variably modified types to C++. This would indeed be a major extension. I simply propose to ignore the size expressions in C headers as a usability improvement. My patch I have somewhere for this are a couple lines of code. I plan to bring this up to WG21 anyway, but standards should ideally standardize things where there exists prior experience. It would be helpful if GCC takes part in this process.