My proposal for the libgcc runtime ABI (ia64 gcc/glibc is broken.)

[Joern Rennecke]

> I think the version number scheme isn't really an issue.  People don't
> seem to get that you cannot remove things from the ABI and/or replace
> things in the ABI without causing severe binary compatibility problems
> with shared libraries, especially on systems where libc depends on the
> shared libgcc.

Actually, the same is true without shared libraries, if the users just
want to keep using old .o files (inside or outside of static libraries)
together with ones compiled with a new compiler.