C++ ABI issues

[Benjamin Kosnik]

Do you know of other ABI-changing bits? I don't think I got them all.

> > Why just non-ia64 targets?
> 
> Because for ia64, the ABI is a cross-vendor standard.  If we bumped the
> version, we would be incompatible with all other compilers, which would
> subvert the entire point of the ABI.

So, how are differences between the C++ ABI in 3.0.x and 3.1.x deduced?

> We have a few tests in the testsuite.  I thought that CodeSourcery had more
> internally, but I haven't heard about them in quite a while.

Hmmmm.