[Bug c/64862] printf attribute should accept other string types

[tromey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64862

--- Comment #2 from Tom Tromey <tromey at gcc dot gnu.org> ---
Naturally my example was wrong.
Sorry about that.  But gcc still doesn't handle it:

#include <stdarg.h>
#include <uchar.h>

extern void p (const char16_t *fmt, ...)
  __attribute__((format (__printf__, 1, 2)));

void f()
{
  p (u"%s %d", 23, "hi");
}



... with gcc saying:

r.cc:5:44: error: format string argument is not a string type
   __attribute__((format (__printf__, 1, 2)));
                                            ^