[Bug target/85915] -mfunction-return=thunk causes multiple definition of `__x86_return_thunk'

[Arfrever.FTA at GMail dot Com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85915

--- Comment #3 from Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail 
dot Com> ---
If you claim that it is a bug in GCC 7.3.0, then please try to fix it in GCC
7.4.0, preferably without breaking ABI compatilibity...