https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89942
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Kan Liu from comment #0)
> This may break ABI compatibility when pass function object between libs
> compiled by 4.9.2 / 5.4.0 gcc.
That's not supported, because the C++11 ABI didn't stabilise until GCC 5.1.0,
see
https://stackoverflow.com/questions/46746878/is-it-safe-to-link-c17-c14-and-c11-objects/49119902#49119902
for a longer explanation.
The attached patch doesn't solve the problem, it just moves it. Now you'd have
ABI incompatibility between GCC 5.x and GCC 5.x, which is even worse.
