[Bug target/85915] ABI incompatibility (multiple definition of `__x86_return_thunk') for static libraries, between GCC 7.3.0 and GCC >=7.4.0, caused by -mfunction-return=thunk

[Arfrever.FTA at GMail dot Com]

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

Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail dot Com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ABI incompatibility         |ABI incompatibility
                   |(multiple definition of     |(multiple definition of
                   |`__x86_return_thunk')       |`__x86_return_thunk') for
                   |between GCC 7.3.0 and GCC   |static libraries, between
                   |>=7.4.0 caused by           |GCC 7.3.0 and GCC >=7.4.0,
                   |-mfunction-return=thunk     |caused by
                   |                            |-mfunction-return=thunk

--- Comment #8 from Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail 
dot Com> ---
It seems that this ABI incompatibility affects all static libraries, not just
libc_nonshared.a.