After downloading audo repository for cas-q-oss and placing files into kernel/drivers/audio kernel compilation fails with error
**aarch64-linux-gnu-ar: techpack/audio/dsp/elliptic: file format not recognized**
debugging output looks like this
aarch64-linux-gnu-ar rcSTPD techpack/audio/built-in.a techpack/audio/soc/built-in.a techpack/audio/dsp/built-in.a techpack/audio/dsp/elliptic techpack/audio/dsp/mius techpack/audio/ipc/built-in.a techpack/audio/asoc/built-in.a
basically AR is trying to add folders to the archive which is not supported.