espressif_build_toolchain.txt

1. origin	https://github.com/crosstool-ng/crosstool-ng.git (push)
2. origin	https://github.com/espressif/crosstool-NG.git (fetch)

git checkout esp-2020r3


smooker@sd4 ~/src/espressif/crosstool-NG $ ./bootstrap && ./configure --enable-local --prefix=/home/smooker/src/espressif/root/
INFO  :: *** Generating package version descriptions

make -j8

smooker@sd4 ~/src/espressif/crosstool-NG $ ./ct-ng xtensa-esp32-elf
  CONF  xtensa-esp32-elf
#
# configuration written to .config
#

***********************************************************

Initially reported by: Ivan Grokhotkov <ivan@espressif.com>
URL: https://github.com/espressif/crosstool-NG

Comment:
Initially based on xtensa-esp108-elf sample reported by Max Filippov <jcmvbkbc@gmail.com>

***********************************************************

WARNING! This sample may enable experimental features.
         Please be sure to review the configuration prior
         to building and using your toolchain!
Now, you have been warned!

***********************************************************

Now configured for "xtensa-esp32-elf"



in esp-idf
./install.sh

smooker@sd4 ~/src/espressif/esp-idf $ . ./export.sh 
Adding ESP-IDF tools to PATH...
Using Python interpreter in /home/smooker/.espressif/python_env/idf4.3_py3.7_env/bin/python
Checking if Python packages are up to date...
Python requirements from /home/smooker/src/espressif/esp-idf/requirements.txt are satisfied.
Added the following directories to PATH:
  /home/smooker/src/espressif/esp-idf/components/esptool_py/esptool
  /home/smooker/src/espressif/esp-idf/components/espcoredump
  /home/smooker/src/espressif/esp-idf/components/partition_table
  /home/smooker/src/espressif/esp-idf/components/app_update
  /home/smooker/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/bin
  /home/smooker/.espressif/tools/xtensa-esp32s2-elf/esp-2020r3-8.4.0/xtensa-esp32s2-elf/bin
  /home/smooker/.espressif/tools/xtensa-esp32s3-elf/esp-2020r3-8.4.0/xtensa-esp32s3-elf/bin
  /home/smooker/.espressif/tools/esp32ulp-elf/2.28.51-esp-20191205/esp32ulp-elf-binutils/bin
  /home/smooker/.espressif/tools/esp32s2ulp-elf/2.28.51-esp-20191205/esp32s2ulp-elf-binutils/bin
  /home/smooker/.espressif/tools/openocd-esp32/v0.10.0-esp32-20200709/openocd-esp32/bin
  /home/smooker/.espressif/python_env/idf4.3_py3.7_env/bin
  /home/smooker/src/espressif/esp-idf/tools
Done! You can now compile ESP-IDF projects.
Go to the project directory and run:

  idf.py build