.. _toolchain_xtools: Crosstool-NG (Deprecated) ######################### .. warning:: ``xtools`` toolchain variant is deprecated. The :ref:`cross-compile toolchain variant ` should be used when using a custom toolchain built with Crosstool-NG. You can build toolchains from source code using crosstool-NG. #. Follow the steps on the crosstool-NG website to `prepare your host `_. #. Follow the `Zephyr SDK with Crosstool NG instructions `_ to build your toolchain. Repeat as necessary to build toolchains for multiple target architectures. You will need to clone the ``sdk-ng`` repo and run the following command: .. code-block:: console ./go.sh .. note:: Currently, only i586 and Arm toolchain builds are verified. #. :ref:`Set these environment variables `: - Set :envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``xtools``. - Set :envvar:`XTOOLS_TOOLCHAIN_PATH` to the toolchain build directory. #. To check that you have set these variables correctly in your current environment, follow these example shell sessions (the :envvar:`XTOOLS_TOOLCHAIN_PATH` values may be different on your system): .. code-block:: console # Linux, macOS: $ echo $ZEPHYR_TOOLCHAIN_VARIANT xtools $ echo $XTOOLS_TOOLCHAIN_PATH /Volumes/CrossToolNGNew/build/output/ .. _crosstool-ng site: http://crosstool-ng.org