Comment 15 for bug 1768148

I cannot confirm the issue with Mixxx 2.1.2. Can you still confirm it with the recent version?

The missing function is here:
https://github.com/mixxxdj/mixxx/blob/80f3ea50a80086ceb2fa38b2f6256951a744d985/src/engine/enginebufferscalest.cpp#L29

I cannot find enginebufferscalest.cpp compiler call in your log.
Normally it is added here
https://github.com/mixxxdj/mixxx/blob/490e90b1c7b583b351cb4c68bb8dabf9ab046ba1/build/depends.py#L578

Maybe scons is mixed up. Can you restart with an clean build directory?