{"id":6951,"date":"2022-01-29T08:59:41","date_gmt":"2022-01-29T08:59:41","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=6951"},"modified":"2023-09-11T12:34:53","modified_gmt":"2023-09-11T07:04:53","slug":"linux-kernel-compilation","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/linux-kernel-compilation\/","title":{"rendered":"Linux Device Driver Programming Lecture 12- Linux kernel compilation"},"content":{"rendered":"
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Linux kernel compilation<\/b><\/span><\/h1>\n
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In our previous article<\/a><\/span>, we guided you through the process of obtaining the Linux source code from the official BeagleBone GitHub repository. Now, let’s proceed to configure and generate the kernel image by compiling the downloaded source code.<\/span><\/p>\n

To achieve this, follow the comprehensive kernel compilation steps outlined below:<\/span><\/p>\n

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STEP 1:<\/span> Remove all the temporary folder, object files, and images<\/span><\/b><\/span> <\/span><\/span><\/p>\n

Begin by removing all temporary folders, object files, and any images generated during previous builds.  <\/span><\/span><\/p>\n

This step also deletes the .config file if created previously using command: <\/span><\/span><\/p>\n

make ARCH=arm distclean<\/b><\/span><\/p>\n

\"Linux
Figure 1. Removing all temporary folder<\/span><\/figcaption><\/figure>\n

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STEP 2: <\/span>Create a .config file<\/b><\/span>  <\/span><\/span><\/p>\n

Next, create a .config<\/code> file using the default configuration file provided by the vendor. Use the following command:<\/span><\/p>\n

make ARCH=arm bb.org_defconfig<\/b><\/span><\/p>\n

\"Linux
Figure 2. Creating .config file<\/span><\/figcaption><\/figure>\n

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STEP 3:<\/span>  Change kernel settings (Optional)<\/strong><\/b><\/span><\/span><\/p>\n

If you need to customize certain kernel settings before compilation, proceed with this step. Run the following command:<\/span><\/p>\n

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig<\/b><\/span><\/p>\n

\"Linux
Figure 3. Kernel settings before compilation<\/span><\/figcaption><\/figure>\n

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STEP 4: <\/span>Create the kernel image and dtbs<\/b><\/span> <\/span><\/span><\/p>\n

This critical step involves compiling the kernel source code, resulting in the creation of the kernel image file, “uImage.” Additionally, all device tree source files will be compiled, and device tree blobs (dtbs) will be generated. Execute the following command:<\/span><\/p>\n

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage dtbs LOADADDR=0x80008000 -j4<\/b><\/span><\/p>\n

\"Figure
Figure 4. Kernel source compilation<\/span><\/figcaption><\/figure>\n

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STEP 5:<\/span> Build and generate in-tree loadable kernel modules<\/b><\/span><\/span><\/p>\n

In this step, we build and generate in-tree loadable(M) kernel modules (.ko files). Use the following command:<\/span><\/p>\n

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-  modules  -j4<\/b><\/span><\/p>\n

\"Figure
Figure 5: To build and generate in-tree loadable kernel module<\/span><\/figcaption><\/figure>\n

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STEP 6:<\/span> Install Kernel Modules<\/strong><\/b><\/span><\/span><\/p>\n

To complete the process, install all the generated .ko files in the default path on your computer, typically located at \/lib\/modules\/<kernel_version><\/code>. Execute the following command:<\/span><\/p>\n

sudo make ARCH=arm  modules_install<\/b><\/span><\/p>\n

\"Figure
Figure 6.Module install<\/span><\/figcaption><\/figure>\n

 <\/p>\n

Upon successful completion of the module installation, navigate to \/lib\/modules\/<\/code>. You will find a new folder created as illustrated in Figure 7, containing all the copied .ko files.<\/span><\/p>\n

\"Figure
Figure 7. New folder is created in \/lib\/modules\/<\/span><\/figcaption><\/figure>\n

 <\/p>\n

With these steps accomplished, you have successfully compiled the Linux kernel and generated the necessary modules. Your system is now equipped with an updated kernel ready for deployment.<\/span><\/p>\n

In the following article, let\u2019s update the kernel image on the BBB hardware<\/a><\/span>. We will cover this in an upcoming article.<\/span><\/p>\n

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FastBit Embedded Brain Academy Courses<\/b><\/span><\/p>\n

Click here: <\/span>https:\/\/fastbitlab.com\/course1<\/a><\/span><\/p>\n

 <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

  Linux kernel compilation     In our previous article, we guided you through the process of obtaining the Linux source code from the official BeagleBone GitHub repository. Now, let’s proceed to configure and generate the kernel image by compiling the downloaded source code. To achieve this, follow the comprehensive kernel compilation steps outlined below: […]<\/p>\n","protected":false},"author":1,"featured_media":6957,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"off","ocean_gallery_id":[],"footnotes":""},"categories":[8],"tags":[18],"class_list":["post-6951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-linux-device-driver-programming","entry","has-media"],"yoast_head":"\nHow to compile the Linux kernel for Beaglebone Black: step by step<\/title>\n<meta name=\"description\" content=\"Learn how to compile the Linux kernel for your Beaglebone Black. 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