1.Environment

1.x86_64 Linux 4.14.14-1-ARCH

2.Tips of build cross-toolchain

1.Need to build xtensa-esp32-elf toolchain locally.

2.If build fail for mistake of scm_ports.o interface.Then change the value of CT_GDB_CROSS_EXTRA_CONFIG_ARRAY to ”–with-guile=guile-2.0” in file crosstool-NG/.config.

3.The tookchain built included in crosstool-NG/builds/xtensa-esp32-elf/bin.

3.Tips of ESP-IDF

ESP-IDF:The specific API/lib of esp-32.