[MacPorts] #42986: openal-soft @1.15.1: complains about pulseaudio (@5.0) not being built with capabilities support

[MacPorts]

#42986: openal-soft @1.15.1: complains about pulseaudio (@5.0) not being built with
capabilities support
---------------------+------------------------------------
 Reporter:  egall@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.2.1
 Keywords:           |       Port:  openal-soft pulseaudio
---------------------+------------------------------------
 I am working on a program that makes some calls to OpenAL, and I am having
 it `dlopen()` the `libopenal.dylib` that the openal-soft port provides.
 When debugging and it hits a function that tries to open a sound device
 via OpenAL, it prints a message like this:
 {{{
 W: [] caps.c: [1mNormally all extra capabilities would be dropped now, but
 that's impossible because PulseAudio was built without capabilities
 support.[0m
 AL lib: (WW) alc_initconfig: Failed to initialize backend "pulse"
 }}}
 I cannot find any such message in the code of the program that I am
 working on, so I must assume that the message is coming from OpenAL. I am
 not sure why OpenAL is trying to use PulseAudio, as I found no mention of
 it in the Portfile for openal-soft, and `otool -L` reports no linkages
 against it... maybe it is being `dlopen()`-ed as well? There was a
 configure check for pulseaudio in openal-soft's `CMakeLists.txt`, at
 least... Anyways, back to the error message... I checked pulseaudio's
 `configure` script for any flags that might be relevant, and noticed that
 the pulseaudio Portfile added the following to its `configure.args`:
 {{{
 --without-caps
 }}}
 Why is this flag necessary? Could it be removed? If so, would that be the
 right approach to enabling capabilities support in PulseAudio?

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Ticket URL: <https://trac.macports.org/ticket/42986>
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