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Setup Linux Toolchain from Scratch (CMake)

The following instructions are alternative to downloading binary toolchain from Espressif website. To quickly setup the binary toolchain, instead of compiling it yourself, backup and proceed to section linux-setup.

Install Prerequisites

To compile with ESP-IDF you need to get the following packages:

  • CentOS 7:

    sudo yum install git wget ncurses-devel flex bison gperf python pyserial cmake ninja-build ccache

  • Ubuntu and Debian:

    sudo apt-get install git wget libncurses-dev flex bison gperf python python-pip python-setuptools python-serial python-cryptography python-future python-pyparsing cmake ninja-build ccache

  • Arch:

    sudo pacman -S --needed gcc git make ncurses flex bison gperf python2-pyserial python2-cryptography python2-future python2-pyparsing cmake ninja ccache

Note

CMake version 3.5 or newer is required for use with ESP-IDF. Older Linux distributions may require updating, enabling of a "backports" repository, or installing of a "cmake3" package rather than "cmake".

Compile the Toolchain from Source

  • Install dependencies:

    • CentOS 7:

      sudo yum install gawk gperf grep gettext ncurses-devel python python-devel automake bison flex texinfo help2man libtool make

    • Ubuntu pre-16.04:

      sudo apt-get install gawk gperf grep gettext libncurses-dev python python-dev automake bison flex texinfo help2man libtool make

    • Ubuntu 16.04 or newer:

      sudo apt-get install gawk gperf grep gettext python python-dev automake bison flex texinfo help2man libtool libtool-bin make

    • Debian 9:

      sudo apt-get install gawk gperf grep gettext libncurses-dev python python-dev automake bison flex texinfo help2man libtool libtool-bin make

    • Arch:

      TODO

Download crosstool-NG and build it:

cd ~/esp
git clone -b xtensa-1.22.x https://github.com/espressif/crosstool-NG.git
cd crosstool-NG
./bootstrap && ./configure --enable-local && make install

Build the toolchain:

./ct-ng xtensa-esp32-elf
./ct-ng build
chmod -R u+w builds/xtensa-esp32-elf

Toolchain will be built in ~/esp/crosstool-NG/builds/xtensa-esp32-elf. Follow instructions for standard setup <setup-linux-toolchain-add-it-to-path-cmake> to add the toolchain to your PATH.

Next Steps

To carry on with development environment setup, proceed to section get-started-get-esp-idf-cmake.