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Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21.

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Sebastian,

I'm fairly certian Robin Gareus made it quite clear what Jeremy was 
saying in his reply:

 >The LV2 FHS that Jeremy mention can be found at
 >https://lv2plug.in/pages/filesystem-hierarchy-standard.html
 >
 >Now you may not like, or disagree with the official standard, but 
breaking it is not acceptable. This affects various >3rd party software, 
notably Reaper, Harrison Mixbus, Ardour and other non-free DAWs that 
expect LV2 plugins in >/usr/lib/lv2/
 >
 >LV2s are to be installed $PREFIX/lib/lv2 (unrelated to $LIBDIR).
 >Most LV2 plugin build systems use LV2DIR = $PREFIX/lib/lv2 for this.

This does divert from the standard location in which shared libraries 
are expected to be located, but LV2 plugins, as you are aware, are not 
normal shared libraries. If they cannot be found in /usr/lib/lv2, then 
it literally breaks the functionality of several DAWs out there, 
including Ardour (which we ship). Sure, users can always manually add 
the search path of /usr/lib/$(DEB_HOST_MULTIARCH)/lv2 to the software, 
but that's an unnecessary inconvenience.

I checked the salsa repo for liblilv (and another) and it seems as 
though /usr/lib/$(DEB_HOST_MULTIARCH)/lv2 is being intentionally set as 
the install location here, so this simply needs to be reverted. I can 
even set-up the pull request.

Beyond that, I will be fairly unhappy if I have to downstream patch this.

Cheers,
Erich

--
Erich Eickmeyer
Project Leader - Ubuntu Studio
Technical Lead - Edubuntu

On 10/29/23 05:10, Sebastian Ramacher wrote:
> Control: tags -1 moreinfo
>
> On 2023-10-19 17:51:33 +0200, Jeremy Jongepier wrote:
>> Package: liblilv-0-0
>> Version: 0.24.14-1
>> Severity: important
>>
>> Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. The addition of this line indicates that something fundamental has changed, namely the default path where Debian installs its LV2 plugins. These go into /usr/lib/$(DEB_HOST_MULTIARCH) too now which breaks setups running software that uses the FHS as a starting point for LV2 plugin discovery. The LV2 plugin packages that Debian now installs are now not discovered anymore.
> I think you are mistaken. It you compare the the default path in
> meson.build and the one specified in debian/rules, it extends the
> default path with /usr/lib/$(DEB_HOST_MULTIARCH)/lv2 (note the lv2).
>
> Please describe the actual problem that you are seeing.
>
> Cheers

-- 
Project Leader - Ubuntu Studio
Technical Lead - Edubuntu

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Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. Jeremy Jongepier <jeremy+debian@autostatic.com> - 2023-10-19 18:10 +0200
  Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. Sebastian Ramacher <sramacher@debian.org> - 2023-10-29 13:20 +0100
    Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. Erich Eickmeyer <eeickmeyer@ubuntu.com> - 2023-10-29 15:10 +0100
      Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. Sebastian Ramacher <sramacher@debian.org> - 2023-10-29 17:50 +0100
        Bug#1054233: liblilv-0-0: Package does not follow FHS, it adds /usr/lib/$(DEB_HOST_MULTIARCH) to the --default-lv2-path waf configure option, see rules file, line 21. Sebastian Ramacher <sramacher@debian.org> - 2023-10-29 19:20 +0100

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