innupgrade for old shared libraries?

[Dominik 'Rathann' Mierzejewski]

On Saturday, 20 November 2021 at 08:35, Julien ÉLIE wrote:
> Hi all,
> 
> Shared libraries installed by previous INN versions tend to accumulate in
> the pathlib directory.
> Shouldn't we remove old ones?  (keeping only the previous one for instance)
> 
> Or should we expect other programs installed on the system, outside INN, to
> go on using old versions of our libraries and therefore we should leave
> them?
> 
> 
> 
> %ls -la
> -rw-r--r-- 1 news news  219K sept. 19 16:17 libinnhist.a
> -r-xr-xr-x 1 news news  1016 sept. 19 16:09 libinnhist.la*
> lrwxrwxrwx 1 root root    19 sept. 19 16:17 libinnhist.so ->
> libinnhist.so.3.0.4*
> lrwxrwxrwx 1 root root    19 sept. 19 16:17 libinnhist.so.3 ->
> libinnhist.so.3.0.4*
> -r-xr-xr-x 1 news news   94K août   8  2015 libinnhist.so.3.0.0*
> -r-xr-xr-x 1 news news  137K nov.  26  2017 libinnhist.so.3.0.1*
> -r-xr-xr-x 1 news news  137K nov.  10  2018 libinnhist.so.3.0.2*
> -r-xr-xr-x 1 news news  137K nov.  22  2020 libinnhist.so.3.0.3*
> -r-xr-xr-x 1 news news  137K sept. 19 16:17 libinnhist.so.3.0.4*

Libraries with the same SONAME should have backwards-compatible ABI, so
there should be no need to keep old versions.

> -rw-r--r-- 1 news news  1,5M sept. 19 16:17 libinn.a
> -r-xr-xr-x 1 news news   925 sept. 19 16:08 libinn.la*
> lrwxrwxrwx 1 root root    15 sept. 19 16:17 libinn.so -> libinn.so.6.0.1*
> lrwxrwxrwx 1 root root    15 août   8  2015 libinn.so.3 -> libinn.so.3.0.0*
> -r-xr-xr-x 1 news news  603K août   6  2015 libinn.so.3.0.0*
> lrwxrwxrwx 1 root root    15 nov.  26  2017 libinn.so.4 -> libinn.so.4.0.0*
> -r-xr-xr-x 1 news news  718K nov.  26  2017 libinn.so.4.0.0*
> lrwxrwxrwx 1 root root    15 nov.  10  2018 libinn.so.5 -> libinn.so.5.0.0*
> -r-xr-xr-x 1 news news  718K sept. 20  2018 libinn.so.5.0.0*
> lrwxrwxrwx 1 root root    15 sept. 19 16:17 libinn.so.6 -> libinn.so.6.0.1*
> -r-xr-xr-x 1 news news  725K nov.  22  2020 libinn.so.6.0.0*
> -r-xr-xr-x 1 news news  725K sept. 19 16:08 libinn.so.6.0.1*

Here we have different SONAMEs, so different ABI. In Fedora we usually
keep just one version of a package unless there are very good reasons
like significant portion of consumers not ported to the new ABI. As
upstream you might have a different policy. Keeping one older SONAME
around sounds like a safe policy for upgrades.

> -rw-r--r-- 1 news news  2,1M sept. 19 16:17 libstorage.a
> -r-xr-xr-x 1 news news   987 sept. 19 16:09 libstorage.la*
> lrwxrwxrwx 1 root root    19 sept. 19 16:17 libstorage.so ->
> libstorage.so.3.0.4*
> lrwxrwxrwx 1 root root    19 sept. 19 16:17 libstorage.so.3 ->
> libstorage.so.3.0.4*
> -r-xr-xr-x 1 news news  746K août   8  2015 libstorage.so.3.0.0*
> -r-xr-xr-x 1 news news  949K nov.  26  2017 libstorage.so.3.0.1*
> -r-xr-xr-x 1 news news  954K nov.  10  2018 libstorage.so.3.0.2*
> -r-xr-xr-x 1 news news  955K nov.  22  2020 libstorage.so.3.0.3*
> -r-xr-xr-x 1 news news 1014K sept. 19 16:17 libstorage.so.3.0.4*

Same SONAME here, too.

Regards,
Dominik
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