Thinking about libgccjit SONAME bump for gcc 5.2 (was Re: Four jit backports to gcc 5 branch)

[Ulrich Drepper]

On Mon, Jun 29, 2015 at 5:26 PM, David Malcolm <dmalcolm@redhat.com> wrote:
> I'm looking at ways to manage libgccjit API/ABI as per this thread:
> https://gcc.gnu.org/ml/gcc-patches/2015-06/msg01982.html
> by transitioning to using symbol versioning, so that the linker can tag
> subsets of libgccjit symbols in both libgccjit and in client binaries.

You don't have to bump the SONAME to introduce symbol versioning.
glibc in the beginning didn't have symbol versioning and we wrote the
linker and dynamic linker support so that no SONAME change was
necessary.  The idea is that unversioned symbols are satisfied by the
oldest symbol version.