[Bug c++/64956] [5 Regression] __GXX_ABI_VERSION needs a proper definition for the 5.x releases

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64956

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, -fabi-version=0 (which is the default now) has always behaved that way.
The question is if we want to change that or not.