[Bug target/99499] build failure for android bionic toolchains. error: '_U' was not declared in this scope

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99499

--- Comment #9 from cqwrteur <unlvsur at live dot com> ---
The only problem now is due to privilege issues, we cannot dynamic linking with
libstdc++-6.so

I think they can just use fast_io instead and that will avoid the bloating
here.