[Bug c++/89923] printf format check and char8_t

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89923

--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
On Fri, 5 Apr 2019, tom at honermann dot net wrote:

> To be clear, the position I'm suggesting is that we add support for something
> like these:

We (GCC) don't control printf; the format checking should match what the 
actual libc supports.