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Setup Toolchain for Mac OS from Scratch

:link_to_translation:zh_CN:[中文]

Note

Standard process for installing the toolchain is described here <macos-setup>. See Customized Setup of Toolchain <get-started-customized-setup> section for some of the reasons why installing the toolchain from scratch may be necessary.

Install Prerequisites

  • install pip:

    sudo easy_install pip

Note

pip will be used later for installing the required Python packages <get-started-get-packages>.

Compile the Toolchain from Source

  • Install dependencies:
    • Install either MacPorts or homebrew package manager. MacPorts needs a full XCode installation, while homebrew only needs XCode command line tools.

    • with MacPorts:

      sudo port install gsed gawk binutils gperf grep gettext wget libtool autoconf automake

    • with homebrew:

      brew install gnu-sed gawk binutils gperftools gettext wget help2man libtool autoconf automake

Create a case-sensitive filesystem image:

hdiutil create ~/esp/crosstool.dmg -volname "ctng" -size 10g -fs "Case-sensitive HFS+"

Mount it:

hdiutil mount ~/esp/crosstool.dmg

Create a symlink to your work directory:

mkdir -p ~/esp
ln -s /Volumes/ctng ~/esp/ctng-volume

Go into the newly created directory:

cd ~/esp/ctng-volume

Download crosstool-NG and build it:

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/ctng-volume/crosstool-NG/builds/xtensa-esp32-elf. Follow instructions for standard setup <setup-macos-toolchain-add-it-to-path> to add the toolchain to your PATH.

Next Steps

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