be sure to update portaudio-19.6 from 2016 to portaudio 19.7

https://github.com/PortAudio/portaudio/releases

06 Apr 2021
@philburk philburk
 v19.7.0
 147dd72
v19.7.0
Latest
Stable release with:

support for latest Mac OS APIs
Jack - fixes for device names that allows use on Linux systems with PipeWire
WASAPI - numerous improvements
OSS - better format support
ALSA - various fixes for hangs and crashes
WDMKS - improved performance and fixes
updated build scripts

---

i had mysterious crashes on my slackware while recording via both audacity and guvcview. Upgrading this lib apparently fixes them!