[Bug libstdc++/108027] mcf thread model causes build issues for multilibs of x86_64-w64-mingw32 target

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108027

--- Comment #8 from cqwrteur <unlvsur at live dot com> ---
(In reply to LIU Hao from comment #7)
> The .la files generated by libtool are usually nonsense
> (https://fedoraproject.org/wiki/Changes/RemoveLaFiles). If you run `make
> install` by hand then you may delete them by hand. Some packagers (e.g.
> makepkg on Arch Linux and MSYS2) purge them before packaging so they can
> never get installed, but some don't (e.g. dpkg-deb on Debian).

if I delete them by hand, then gcc could not build anymore since build scripts
of libstdc++ would complain .la do not exist