@beriberikix would you send a PR to fix the documentation?

@nashif have you ever had to set ESP_IDF_PATH when building for ESP32?

Happy to submit the immediate doc bug. However, the change I suggested would require modifying the source code. Should I submit the PR for the docs or should we discuss the proposed change first?

I do the following to build for ESP32:

. ~/esp/esp-idf/export.sh
export ZEPHYR_TOOLCHAIN_VARIANT=espressif
export ESPRESSIF_TOOLCHAIN_PATH=${HOME}/.espressif/tools/xtensa-esp32-elf/esp32-2019r1-8.2.0/xtensa-esp32-elf/
export ESP_IDF_PATH=${IDF_PATH}

west build -b esp32
west flash --esp-device /dev/ttyUSB0

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/zephyrproject/zephyr/samples/hello_world$ west build -b esp32 -p
-- west build: making build dir /home/novello/zephyrproject/zephyr/samples/hello_world/build pristine
-- west build: generating a build system
Including boilerplate (Zephyr base): /home/novello/zephyrproject/zephyr/cmake/app/boilerplate.cmake
-- Application: /home/novello/zephyrproject/zephyr/samples/hello_world
-- Zephyr version: 2.7.99 (/home/novello/zephyrproject/zephyr), build: v2.7.99-748-gb88111bcf01f
-- Found Python3: /usr/bin/python3.8 (found suitable exact version "3.8.10") found components: Interpreter
-- Found west (found suitable version "0.11.1", minimum required is "0.7.1")
-- Board: esp32
-- Cache files will be written to: /home/novello/.cache/zephyr
-- Using toolchain: zephyr 0.13.1 (/home/novello/zephyr-sdk)
-- Found dtc: /home/novello/zephyr-sdk/sysroots/x86_64-pokysdk-linux/usr/bin/dtc (found suitable version "1.6.0", minimum required is "1.4.6")
-- Found BOARD.dts: /home/novello/zephyrproject/zephyr/boards/xtensa/esp32/esp32.dts
-- Generated zephyr.dts: /home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/zephyr.dts
-- Generated devicetree_unfixed.h: /home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/include/generated/devicetree_unfixed.h
-- Generated device_extern.h: /home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/include/generated/device_extern.h
-- Including generated dts.cmake file: /home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/dts.cmake
Parsing /home/novello/zephyrproject/zephyr/Kconfig
Loaded configuration '/home/novello/zephyrproject/zephyr/boards/xtensa/esp32/esp32_defconfig'
Merged configuration '/home/novello/zephyrproject/zephyr/samples/hello_world/prj.conf'
Configuration saved to '/home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/.config'
Kconfig header saved to '/home/novello/zephyrproject/zephyr/samples/hello_world/build/zephyr/include/generated/autoconf.h'
CMake Error at /home/novello/zephyrproject/zephyr/cmake/compiler/gcc/target.cmake:10 (message):
C compiler
/home/novello/zephyr-sdk/xtensa//xtensa-zephyr-elf/bin/xtensa-zephyr-elf-gcc
not found - Please check your toolchain installation
Call Stack (most recent call first):
/home/novello/zephyrproject/zephyr/cmake/target_toolchain.cmake:57 (include)
/home/novello/zephyrproject/zephyr/cmake/app/boilerplate.cmake:579 (include)
/home/novello/zephyrproject/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:24 (include)
/home/novello/zephyrproject/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:35 (include_boilerplate)
CMakeLists.txt:5 (find_package)

-- Configuring incomplete, errors occurred!
FATAL ERROR: command exited with status 1: /usr/bin/cmake -DWEST_PYTHON=/usr/bin/python3 -B/home/novello/zephyrproject/zephyr/samples/hello_world/build -S/home/novello/zephyrproject/zephyr/samples/hello_world -GNinja -DBOARD=esp32
sorry I'm using zephyr 2.7.99 over ubuntu 20.04 and this is the error ....