[Bug libstdc++/109602] Import Gentoo msgfmt patch ?

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109602

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am 99% sure this patch is not portable at all. In that not all env supports
--unset.