Re: Expat 2.3.0 has been released

[Sebastian Pipping]

Hi Maxime,


On 09.05.21 11:17, Maxime Devos wrote:
> I see Leo Prikler has already sent a patch (48304@debbugs.gnu.org).

yes, thanks for you interest in the topic.


On 09.05.21 11:12, Maxime Devos wrote:
> According to "guix refresh -l", simply updating expat would entail rebuilding 
> 6031
> packages. This can be avoided is v2.4.0 is binary compatible with v2.2.9.
> Is this the case?

The short answer is: there is no break of ABI.

A longer answer would include that the next release will also be hiding
a previously exposed internal symbol by the name
"_INTERNAL_trim_to_complete_utf8_characters".  I don't consider that an
ABI break but we'll probably find someone who does, on a technical level.

The related soversions are:

  2.2. 9 = 7:11:6 -> libexpatso.1.6.11 (GUIX today)
  2.2.10 = 7:12:6 -> libexpatso.1.6.12
  2.3. 0 = 8: 0:7 -> libexpatso.1.7.0 (GUIX W.I.P.)
  2.4. 0 = 9: 0:8 -> libexpatso.1.8.0 (upcoming)

I wish related tool https://verbump.de/ was more widely known.

Best



Sebastian