[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 #22 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
Created attachment 44126
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44126&action=edit
Patch to add symver attribute, highly experimental, C++ only