.. _toolchain_designware_arc_mwdt:

DesignWare ARC MetaWare Development Toolkit (MWDT)
##################################################

#. You need to have `ARC MWDT <https://www.synopsys.com/dw/ipdir.php?ds=sw_metaware>`_ installed on
   your host.

#. You need to have :ref:`Zephyr SDK <toolchain_zephyr_sdk>` installed on your host.

   .. note::
      A Zephyr SDK is used as a source of tools like device tree compiler (DTC), QEMU, etc...
      Even though ARC MWDT toolchain is used for Zephyr RTOS build, still the GNU preprocessor & GNU
      objcopy might be used for some steps like device tree preprocessing and ``.bin`` file
      generation. We used Zephyr SDK as a source of these ARC GNU tools as well.

#. :ref:`Set these environment variables <env_vars>`:

   - Set :envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``arcmwdt``.
   - Set :envvar:`ARCMWDT_TOOLCHAIN_PATH` to the toolchain installation directory. MWDT installation
     provides :envvar:`METAWARE_ROOT` so simply set :envvar:`ARCMWDT_TOOLCHAIN_PATH` to
     ``$METAWARE_ROOT/../`` (Linux) or ``%METAWARE_ROOT%\..\`` (Windows).

   .. tip::
      If you have only one ARC MWDT toolchain version installed on your machine you may skip setting
      :envvar:`ARCMWDT_TOOLCHAIN_PATH` - it would be detected automatically.

#. To check that you have set these variables correctly in your current
   environment, follow these example shell sessions (the
   :envvar:`ARCMWDT_TOOLCHAIN_PATH` values may be different on your system):

   .. code-block:: console

      # Linux:
      $ echo $ZEPHYR_TOOLCHAIN_VARIANT
      arcmwdt
      $ echo $ARCMWDT_TOOLCHAIN_PATH
      /home/you/ARC/MWDT_2023.03/

      # Windows:
      > echo %ZEPHYR_TOOLCHAIN_VARIANT%
      arcmwdt
      > echo %ARCMWDT_TOOLCHAIN_PATH%
      C:\ARC\MWDT_2023.03\