[Bug libstdc++/115907] Libstdc++ and GCC itself should avoid glibc above 2.34 dependency

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115907

--- Comment #33 from cqwrteur <unlvsur at live dot com> ---
https://gcc.gnu.org/onlinedocs/gccint/Configure-Terms.html

"If build and target are the same, but host is different, you are using a cross
compiler to build a cross compiler that produces code for the machine you’re
building on. This is rare, so there is no common way of describing it. There is
a proposal to call this a crossback."

Here build == target == x86_64-pc-linux-gnu but host == x86_64-w64-mingw32