[Bug c++/104157] -std=libc++ does not with cross compilers and moving the install around (places the include path last)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104157

--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to cqwrteur from comment #12)
> well. plus canadian cross back compiler From windows to linux.
> probably only i cross compile Linux programs on windows.(several other
> people downloaded my toolchains.)

Yes but hardly anyone uses -std=libc++ in general :). And using non-sysroot
these days is not really supported and for good reasons.