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
