idf.py build flash monitor

[Dellason]

Commit: 7831f29 (v0.8.2-esp32)
ESP-IDF: v5.3
Toolchain: xtensa-esp-elf 13.2.0
Apple Silicon (M1)

The linker error:
undefined reference to '__ieee754_sqrtf'

[ruvnet]

The __ieee754_sqrtf undefined reference is a known toolchain/SDK version mismatch. The firmware build is tested against ESP-IDF v5.4 — v5.3 is missing some math stubs that xtensa-esp-elf 13.2.0 expects.

Please upgrade to ESP-IDF v5.4.x and rebuild. On Apple Silicon, use the ESP-IDF installer and select v5.4 from the version picker, or via idf_tools.py install after switching with idf_tools.py install esp-idf==v5.4.0. Clean the build directory (idf.py fullclean) before re-running.

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Generated by Claude Code

[ruvnet]

The undefined reference to '__ieee754_sqrtf' error is a known toolchain incompatibility between ESP-IDF v5.3 and the xtensa-esp-elf toolchain on Apple Silicon. The firmware builds against ESP-IDF v5.4 — v5.3 is not supported.

Fix: switch to the v5.4 branch and reinstall the toolchain:

cd ~/esp/esp-idf
git checkout v5.4
./install.sh esp32s3
. ./export.sh

Then retry idf.py build. If you used a manual toolchain install rather than install.sh, ensure the xtensa-esp-elf version bundled with v5.4 is on your PATH (the v5.3 toolchain ships a different libm stub that is missing __ieee754_sqrtf on the M1 target).

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Generated by Claude Code