The BitBake QA warning QA Issue: File ... was already stripped occurs in Yocto builds when prebuilt vendor binary files have debug symbols removed prior to Yocto packaging.

Yocto Recipe INSANE_SKIP Snippet

myrecipe.bbbitbake
# Suppress already-stripped BitBake QA check warning for prebuilt binaries
INSANE_SKIP:${PN} += "already-stripped"