Step 2 : Compile Openwrt Linux
===============================

.. tab-set::

   .. tab-item:: Compile openwrt linux.

        * In this program, you are going to learn


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                * How to ?


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        Topics in this section,

                * :ref:`Source code download and compilation <openwrt_qemu_x86_step5_0>`


.. _openwrt_qemu_x86_step5_0:

.. tab-set::

   .. tab-item:: Source code download and compilation

        * Install qemu-system-arm package in the build system.

        .. code-block:: c

                sudo apt-get install qemu-system-arm

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

                $ cd $HOME

        * Download the openwrt source code.

        .. code-block:: c

                $ git clone https://git.openwrt.org/openwrt/openwrt.git

        * Go to the openwrt directory and update the feeds.

        .. code-block:: c

                $ cd openwrt
                $ ./scripts/feeds update -a
                
        * Replace the .config file by the default qemu x86-64 config file downloaded from the below link. 

        .. code-block:: c

                $ wget https://downloads.openwrt.org/releases/21.02.2/targets/armvirt/64/config.buildinfo
                $ cp config.buildinfo .config

        * Run make command from "openwrt" directory to build the bare-linux

        .. code-block:: c

                $ make

        * Once the build is done, the final target image will be present in the following directory.

        .. code-block:: c

                $pwd
                $HOME/openwrt/bin/targets/armvirt/64
                test:64$ ls -l
                total 329288
                -rw-r--r-- 1 test test      2787 Jan 31 16:14 config.buildinfo
                -rw-r--r-- 1 test test        71 Jan 31 16:14 feeds.buildinfo
                -rw-r--r-- 1 test test 108354337 Jan 31 16:34 kernel-debug.tar.zst
                -rw-r--r-- 1 test test      3585 Jan 31 16:34 openwrt-21.02.2-armvirt-64-default.manifest
                -rw-r--r-- 1 test test   4957617 Jan 31 16:34 openwrt-21.02.2-armvirt-64-default-rootfs.tar.gz
                -rwxr-xr-x 1 test test   9624064 Jan 31 16:34 openwrt-21.02.2-armvirt-64-Image
                -rwxr-xr-x 1 test test  21551616 Jan 31 16:34 openwrt-21.02.2-armvirt-64-Image-initramfs
                -rw-r--r-- 1 test test   4960901 Jan 31 16:34 openwrt-21.02.2-armvirt-64-rootfs.cpio.gz
                -rw-r--r-- 1 test test   5076391 Jan 31 16:34 openwrt-21.02.2-armvirt-64-rootfs-ext4.img.gz
                -rw-r--r-- 1 test test   4038448 Jan 31 16:34 openwrt-21.02.2-armvirt-64-rootfs-squashfs.img.gz
                -rw-r--r-- 1 test test  69259584 Jan 31 16:35 openwrt-imagebuilder-21.02.2-armvirt-64.Linux-x86_64.tar.xz
                -rw-r--r-- 1 test test 109265004 Jan 31 16:36 openwrt-sdk-21.02.2-armvirt-64_gcc-8.4.0_musl.Linux-x86_64.tar.xz
                drwxr-xr-x 2 test test     86016 Jan 31 16:36 packages
                -rw-r--r-- 1 test test    117414 Jan 31 16:36 sha256sums
                -rw-r--r-- 1 test test        18 Jan 31 16:14 version.buildinfo 

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        What is /.bashrc file?

        .. dropdown:: See Answer

                * ??