Step 3 : Creating build directory and adding configurations
==============================================================

.. tab-set::

   .. tab-item:: Creating build directory and adding build configurations

        * In this program, you are going to learn


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                * How to ?


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        Topics in this section,

                * :ref:`Creating build directory and adding configurations <yocto_rpi_4b_step3_0>`


.. _yocto_rpi_4b_step3_0:

.. tab-set::

   .. tab-item:: Creating build directory and adding configurations

        * Make sure current dir is $HOME
        
        .. code-block:: c

                $ cd $HOME

         
        * Create the build directory to compile the source code using the following command.

        .. code-block:: c

                $ source poky/oe-init-build-env
        
        * Once this command is executed it will be automatically directed to the build directory.

        * Add all the required meta-layers to the "conf/bblayers.conf" using the following command.

        .. code-block:: c

                $ bitbake-layers add-layer ../meta-openembedded/meta-oe
                $ bitbake-layers add-layer ../meta-openembedded/meta-python
                $ bitbake-layers add-layer ../meta-openembedded/meta-multimedia
                $ bitbake-layers add-layer ../meta-openembedded/meta-networking
                $ bitbake-layers add-layer ../meta-raspberrypi
                $ bitbake-layers show-layers

        * Set the build configurations in local.conf by adding the following build configurations.

        .. code-block:: c

                $ vi conf/local.conf

                MACHINE ?= "raspberrypi4-64"
                DL_DIR ?= "${HOME}/yocto-downloads"
                SSTATE_DIR ?= "${HOME}/yocto-sstate-cache"
                SSTATE_MIRRORS ?= "file://.* http://sstate.yoctoproject.org/3.1.15/PATH;downloadfilename=PATH \n "
                EXTRA_IMAGE_FEATURES_append = " ssh-server-dropbear"
                CORE_IMAGE_EXTRA_INSTALL_append = " nano"

        * Once all the configurations is added you can cross check using the following command.

        .. code-block:: c

                $ bitbake core-image-base -n