[Bug libstdc++/116362] [15 Regression] libstdc++ assumes newlib is configured to include iconv

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116362

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That isn't new, but checking the HAVE_ICONV macro and using icon inside the
library is new.