Setup Toolchain for Mac OS from Scratch (Legacy GNU Make)
Note
Since ESP-IDF V4.0, the default build system is based on CMake. This documentation is for the legacy build system based on GNU Make. Support for this build system may be removed in future major releases.
Note
Standard process for installing the toolchain is described here. See Customized Setup of Toolchain 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.
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:
git clone https://github.com/espressif/crosstool-NG.git
cd crosstool-NG
git checkout esp-2021r2-patch5
git submodule update --init
./bootstrap && ./configure --enable-local && make
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 to add the toolchain to your PATH.
Next Steps
To carry on with development environment setup, proceed to section Step 2. Get ESP-IDF.