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Standard Setup of Toolchain for Linux
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Install Prerequisites
=====================
To compile with ESP-IDF you need to get the following packages:
- CentOS 7::
sudo yum install git wget make ncurses-devel flex bison gperf python pyserial
- Ubuntu and Debian::
sudo apt-get install 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
===============
ESP32 toolchain for Linux is available for download from Espressif website:
- for 64-bit Linux:
https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a-5.2.0.tar.gz
- for 32-bit Linux:
https://dl.espressif.com/dl/xtensa-esp32-elf-linux32-1.22.0-61-gab8375a-5.2.0.tar.gz
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1. Download this file, then extract it in `` ~/esp `` directory::
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mkdir -p ~/esp
cd ~/esp
tar -xzf ~/Downloads/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a-5.2.0.tar.gz
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.. _setup-linux-toolchain-add-it-to-path:
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2. The toolchain will be extracted into `` ~/esp/xtensa-esp32-elf/ `` directory.
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To use it, you will need to update your `` PATH `` environment variable in `` ~/.profile `` file. To make `` xtensa-esp32-elf `` available for all terminal sessions, add the following line to your `` ~/.profile `` file::
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export PATH="$PATH:$HOME/esp/xtensa-esp32-elf/bin"
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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::
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alias get_esp32='export PATH="$PATH:$HOME/esp/xtensa-esp32-elf/bin"'
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Then when you need the toolchain you can type `` get_esp32 `` on the command line and the toolchain will be added to your `` PATH `` .
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.. 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::
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printenv PATH
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You are looking for similar result containing toolchain's path at the end of displayed string::
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$ 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/xtensa-esp32-elf/bin
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Instead of `` /home/user-name `` there should be a home path specific to your installation.
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Arch Linux Users
----------------
To run the precompiled gdb (xtensa-esp32-elf-gdb) in Arch Linux requires ncurses 5, but Arch uses ncurses 6.
Backwards compatibility libraries are available in AUR_ for native and lib32 configurations:
- https://aur.archlinux.org/packages/ncurses5-compat-libs/
- https://aur.archlinux.org/packages/lib32-ncurses5-compat-libs/
Alternatively, use crosstool-NG to compile a gdb that links against ncurses 6.
Next Steps
==========
To carry on with development environment setup, proceed to section :ref: `get-started-get-esp-idf` .
Related Documents
=================
.. toctree ::
:maxdepth: 1
linux-setup-scratch
.. _AUR: https://wiki.archlinux.org/index.php/Arch_User_Repository
