OVMS3-idf/docs/en/get-started-cmake/macos-setup-scratch.rst

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Setup Toolchain for Mac OS from Scratch (CMake)
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.. include:: ../cmake-warning.rst
Package Manager
===============
To set up the toolchain from scratch, rather than :doc:`downloading a pre-compiled toolchain<macos-setup>`, you will need to install either the MacPorts_ or homebrew_ package manager.
MacPorts needs a full XCode installation, while homebrew only needs XCode command line tools.
.. _homebrew: https://brew.sh/
.. _MacPorts: https://www.macports.org/install.php
Install Prerequisites
=====================
- install pip::
sudo easy_install pip
- install pyserial::
pip install --user pyserial
- install CMake & Ninja build:
- If you have HomeBrew, you can run::
brew install cmake ninja
- If you have MacPorts, you can run::
sudo port install cmake ninja
Compile the Toolchain from Source
=================================
- Install dependencies:
- with MacPorts::
sudo port install gsed gawk binutils gperf grep gettext wget libtool autoconf automake make
- with homebrew::
brew install gnu-sed gawk binutils gperftools gettext wget help2man libtool autoconf automake make
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 :ref:`instructions for standard setup <setup-macos-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 :ref:`get-started-get-esp-idf-cmake`.