[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 #5 from cqwrteur <unlvsur at live dot com> ---
Created attachment 50548
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50548&action=edit
linux build, FreeBSD host, Windows target

The error still exists.

It looks MSVCRT does not always define those C11 cfenv functions and the
feature testing macro does not detect them correctly???