On 02/23/2018 01:22 PM, Daniel Kahn Gillmor wrote:
> On Fri 2018-02-23 12:57:09 +0100, Tim Rühsen wrote:
>> Well, adding or removing a flag *is* a change of the interface. Not
>> clear here if 'interface' means 'function'. From a logical point of
>> understanding it could be anything changing the behavior of the library
>> *or* the application. That means it could be flags, enum values,
>> functions, function params, defines, ...
> agreed, the semantics are fuzzy here.
>> An *automated* stable (packaging and runtime) behavior could only be
>> achieved if SONAME gets bumped in any of the above cases. If we revert
>> the bump, there will be chances to get an unstable behavior (as you
>> stated as well). Even if only one person is affected and even if that is
>> unlikely - why open up a hole ?
> well, bumping the SONAME also means that it's a "library transition",
> which means that everything which builds against libpsl.  Gratuitous
> library transitions make the buildd maintainers grumpy :/

'grumpy' because there is manual work involved ? In this case it
shouldn't be - since no app is using the new feature yet, everything
should work fully automatic and smoothly.

> I note that if all previous versions had returned something like
> ENOTIMPL if they detected a flag that they didn't know about, an SONAME
> bump *definitely* wouldn't be required (at the expense of the library
> user needing to be able to handle an additional error case at runtime).
> Anyway, i'm inclined to revert the SONAME bump for this one, and move it
> back to 8:0:3 -- but if you add code to provide ENOTIMPL-ish semantics,
> then i'd be inclined to consider that worth doing the SONAME bump for,
> since it means we'll have a clear way to add new flags in the future.

I agree with moving back to 8:0:3.
Prepared the release in branch 'prepare-0.20.1'. Please ACK if it looks
good to you.

Regards, Tim

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