Description: Reported a upstream bug:
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/778#note_368187

tried to setup with git bisect, starting with commit
916be59151e020faaa19e11af955071b695d8c9d

and building old versions of pulseaudio try to find out when the error is introduced.

but running in all sorts of errors with one stopping me:
./pulseaudio/src/modules/alsa/alsa-ucm.h:26:10: schwerwiegender Fehler: use-case.h: File or Folder not found
26 | #include <use-case.h>

I checked, /usr/include/alsa/use-case.h exists,
buts its not in the include path, and I don't know how to fix this via pkgbuild

Can You please support Russell Treleaven to find the bug?

Additional info:
* package version(s)
tried to build from commit 916be59151e020faaa19e11af955071b695d8c9d
* config and/or log files etc.
see attached pkgbuild
* link to upstream bug report, if any
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/778#note_368187

Steps to reproduce:
checkout pulseaudio,
do
git bisect start
git bisect bad
git bisect good 84952e6a092b6a0c5b153bd7a4f6e490810681c8
binäre Suche: danach noch 437 Commits zum Testen übrig (ungefähr 9 Schritte)
[916be59151e020faaa19e11af955071b695d8c9d] pipe-sink, pipe-source: fix file permission

,enter the commit hash into the pkgbuild,
comment out that meson patch

run makepkg and it fails due the code does not expect
the alsa stuff to be in a subdirectory or that subdir is not in the path