versioning of _Unwind_*() symbols

[Gabriel Dos Reis]

Jim Wilson <wilson@specifixinc.com> writes:

| I fail to see any difference between what glibc does and what libgcc
| does.

I believe the main difference is that libgcc is tightly coupled with
the compiler and glibc is more much decoupled.  libgcc is fixed by the
compiler. That makes its versioning more debatable.  
I'm not sure we can reason on what glibc does and transpose the
outcome to libgcc.

-- Gaby