704bc8d35c3af432163f1c14c27eb8b95f838409
Use balenalib/raspberry-pi-debian:stretch with legacy.raspbian.org repos. Exact match: GCC 6.3, Python 3.5, GLIBC 2.24 — identical to the Pi. First build ~25min (QEMU), subsequent builds ~1sec (cached image). Replaces the broken Bullseye approach that had GLIBC/GLIBCXX mismatches.
#OneFinity CNC Controller Firmware
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