Setup Toolchain for Mac OS from Scratch

Install Prerequisites

• install pip:

  sudo easy_install pip
  

• install pyserial:

  sudo pip install pyserial
  

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:

cd ~/esp
ln -s /Volumes/ctng crosstool-NG

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 to add the toolchain to your PATH.

Next Steps

To carry on with development environment setup, proceed to section 获取 ESP-IDF.