I see now as of wine-devel-6.20, wine is built with /libs/faudio source as PE. I know the overall plan is to get distro's to provide the PE packages, but i would think this is still a bit ahead in time (atleast for some distro's)

ref:
https://github.com/wine-mirror/wine/commit/6b45777121fcd50d9b7d5b649c6710063b549892
https://github.com/wine-mirror/wine/commit/d8be85863fedf6982944d06ebd1ce5904cb3d4e1

and

libs: Import code from upstream FAudio 21.10.
xaudio: Use the bundled FAudio and build with msvcrt.

Does this mean that libFAudio-dev requirement for package build on OBS can be dropped? Distro(s) in question is then Debian/Ubuntu, and packages would be wine-devel-6.21+ and wine-staging-6.21+

The note on libFAudio-21.11 also sais this:

Deprecated Features:

  * GStreamer support is now deprecated.
   o Wine users should migrate to 6.20 and newer, and everyone else
   should move to codecs that are not patent-encumbered.
   o GStreamer support will be fully removed in the first release
   after Wine 7.0.

Removed Features:

  * Removed the C++ wrapper. Use the headers/PE binaries found in Wine
   6.20 and newer.

PS. I am aware that libFAudio.so.0 would still be required for < wine-devel/staging-6.19 and wine-stable-6.0, but the above would (to me) indicate that configure no longer checks for the systemlib development package, and thus build-depends: libFAudio-dev could be dropped when building packages.

Sveinar