[Bug target/61637] C++ program does not catch exceptions on AIX 7.1

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61637

--- Comment #22 from David Edelsohn <dje at gcc dot gnu.org> ---
It is specific functionality that has not yet been implemented for 64 bit AIX.
It works for 32 bit AIX.