[Bug libstdc++/100017] error: 'fenv_t' has not been declared in '::' x86_64-w64-mingw32 host cross toolchain fails to build

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017

--- Comment #1 from cqwrteur <unlvsur at live dot com> ---
I tried to build a full host GCC toolchain from Linux to Windows and fenv_t
does not exist.