[Bug libstdc++/77459] [6/7 Regression] undefined reference to `snprintf' when building mingw-w64 cross-compiler

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77459

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's 2016, how can snprintf not be supported still?