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

[hjl.tools at gmail dot com]

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

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Arfrever Frehtes Taifersar Arahesis from comment #3)
> 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...

Please try GCC 7 branch.