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2019-04-29 17:24:10 +08:00

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Standard Setup of Toolchain for Linux
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Install Prerequisites
=====================
To compile with ESP8266_RTOS_SDK you need to get the following packages:
- CentOS 7::
sudo yum install gcc git wget make ncurses-devel flex bison gperf python pyserial
- Ubuntu and Debian::
sudo apt-get install gcc git wget make libncurses-dev flex bison gperf python python-serial
- Arch::
sudo pacman -S --needed gcc git make ncurses flex bison gperf python2-pyserial
Toolchain Setup
===============
ESP8266 toolchain for Linux is available for download from Espressif website:
- for 64-bit Linux:
https://dl.espressif.com/dl/xtensa-lx106-elf-linux64-1.22.0-92-g8facf4c-5.2.0.tar.gz
- for 32-bit Linux:
https://dl.espressif.com/dl/xtensa-lx106-elf-linux32-1.22.0-88-gde0bdc1-4.8.5.tar.gz
1. Download this file, then extract it in ``~/esp`` directory::
mkdir -p ~/esp
cd ~/esp
tar -xzf ~/Downloads/xtensa-lx106-elf-linux64-1.22.0-92-g8facf4c-5.2.0.tar.gz
.. _setup-linux-toolchain-add-it-to-path:
2. The toolchain will be extracted into ``~/esp/xtensa-lx106-elf/`` directory.
To use it, you will need to update your ``PATH`` environment variable in ``~/.profile`` file. To make ``xtensa-lx106-elf`` available for all terminal sessions, add the following line to your ``~/.profile`` file::
export PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"
Alternatively, you may create an alias for the above command. This way you can get the toolchain only when you need it. To do this, add different line to your ``~/.profile`` file::
alias get_lx106='export PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"'
Then when you need the toolchain you can type ``get_lx106`` on the command line and the toolchain will be added to your ``PATH``.
.. note::
If you have ``/bin/bash`` set as login shell, and both ``.bash_profile`` and ``.profile`` exist, then update ``.bash_profile`` instead.
3. Log off and log in back to make the ``.profile`` changes effective. Run the following command to verify if ``PATH`` is correctly set::
printenv PATH
You are looking for similar result containing toolchain's path at the end of displayed string::
$ printenv PATH
/home/user-name/bin:/home/user-name/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/user-name/esp/xtense-lx106-elf/bin
Instead of ``/home/user-name`` there should be a home path specific to your installation.
Permission issues /dev/ttyUSB0
------------------------------
With some Linux distributions you may get the ``Failed to open port /dev/ttyUSB0`` error message when flashing the ESP8266.
Next Steps
==========
To carry on with development environment setup, proceed to section :ref:`get-started-get-esp-idf`.
Related Documents
=================
.. _AUR: https://wiki.archlinux.org/index.php/Arch_User_Repository