I think there are a couple of minor issues in the https://github.com/elk-audio/elkpi-sdk repository.
The link “latest toolchain” points still ad the old RPi3 sdk (https://github.com/elk-audio/elkpi-sdk/releases/download/v0.6/elk-glibc-x86_64-elk-sika-image-dev-cortexa7t2hf-neon-vfpv4-raspberrypi3-toolchain-1.0.sh)
And the new Release for 1.0 is hidden from the “Releases” page for some reason, see pictures.
It can only be accessed from the main repo page or the tags page, but it doesn’t show up in https://github.com/elk-audio/elkpi-sdk/releases.
I fixed (well, removed) the latest toolchain link. The “hidden” release was weird, I was actually able to verify that only with an Incognito browser window, it seems fixed now though.