Fujii Masao <masao(dot)fujii(at)gmail(dot)com> writes:
> The ABI break was caused by removing the external function
> basebackup_progress_done(). I think the better fix for the stable branches
> is to restore that function, even though PostgreSQL core itself no longer
> uses it, rather than updating the .abi-compliance-history file. Because
> some external backup tools may still be calling basebackup_progress_done().
+1
regards, tom lane