GNU bug report logs - #40832
alsa-lib cannot find its plugins

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From: Leo Famulari <leo <at> famulari.name>
To: 40832 <at> debbugs.gnu.org
Subject: bug#40832: Audacity does not work with PulseAudio
Date: Sat, 25 Apr 2020 00:03:41 -0400

On Fri, Apr 24, 2020 at 07:15:24PM -0400, Leo Famulari wrote:
> ------
> ALSA lib conf.c:3683:(snd_config_hooks_call) Cannot open shared library libasound_module_conf_pulse.so (/gnu/store/nyylgcnzmbw8wrn4sna2crl0g7zxxh33-alsa-lib-1.2.2/lib/alsa-lib/libasound_module_conf_pulse.so: libasound_module_conf_pulse.so: cannot open shared object file: No such file or directory)
> ------

alsa-lib looks for this based on the compile-time constant
ALSA_PLUGIN_DIR, set during configure using --with-plugindir.

This is tricky because alsa-plugins depends on alsa-lib, and there are
also other packages that can provide plugins, like bluez-alsa.

Nixpkgs used to patch alsa-lib to look things up at runtime with an
environment variable, but stopped for some reason. That discussion even
points back to Guix periodically, but no solutions:

https://github.com/NixOS/nixpkgs/issues/6860

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