[Bug lto/48200] linking shared library with LTO results in different exported symbols

[ryxi at stu dot xidian.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48200

--- Comment #14 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
(In reply to Jan Hubicka from comment #13)
> What is status of this bug in general? I must admit I thought we have issues
> long solved here :(

It still exists in 8.1.  Libstdc++ uses top level asm statement for symbol
versioning.  Then symbol std::istream::ignore(long)@GLIBCXX_3_4 just
disappears, and libstdc++.so can't be used (this symbol becomes *UND*).