[Bug libstdc++/123480] -static-libstdc++ exposes libstdc++ symbols in executable on RISC-V/MIPS, but not on x86

[uwu at icenowy dot me via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123480

--- Comment #15 from Icenowy Zheng <uwu at icenowy dot me> ---
I understand this is not proper usage, however such kind of usage exists in
wild, and it's a real problem about how to prevent it.