309 lines
18 KiB
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309 lines
18 KiB
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<ol class="chapter"><li class="chapter-item expanded "><a href="architecture.html"><strong aria-hidden="true">1.</strong> Architecture</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="boot_process.html"><strong aria-hidden="true">1.1.</strong> Boot Process</a></li><li class="chapter-item expanded "><a href="filesystem_layout.html"><strong aria-hidden="true">1.2.</strong> MLL ISO Image Structure</a></li></ol></li><li class="chapter-item expanded "><a href="overview.html"><strong aria-hidden="true">2.</strong> Shell Scripts & Folders</a></li><li class="chapter-item expanded "><a href="build_scripts.html" class="active"><strong aria-hidden="true">3.</strong> Build Process</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="config_file.html"><strong aria-hidden="true">3.1.</strong> Configuration File</a></li><li class="chapter-item expanded "><a href="common.html"><strong aria-hidden="true">3.2.</strong> Common Properties & Functions</a></li><li class="chapter-item expanded "><a href="00_clean.html"><strong aria-hidden="true">3.3.</strong> Step 00 - Clean Workspace</a></li><li class="chapter-item expanded "><a href="01_get_kernel.html"><strong aria-hidden="true">3.4.</strong> Step 01 - Get Kernel</a></li><li class="chapter-item expanded "><a href="02_build_kernel.html"><strong aria-hidden="true">3.5.</strong> Step 02 - Build Kernel</a></li><li class="chapter-item expanded "><a href="03_get_glibc.html"><strong aria-hidden="true">3.6.</strong> Step 03 - Get GLIBC</a></li><li class="chapter-item expanded "><a href="04_build_glibc.html"><strong aria-hidden="true">3.7.</strong> Step 04 - Build GLIBC</a></li><li class="chapter-item expanded "><a href="05_prepare_sysroot.html"><strong aria-hidden="true">3.8.</strong> Step 05 - Prepare Sysroot</a></li><li class="chapter-item expanded "><a href="06_get_busybox.html"><strong aria-hidden="true">3.9.</strong> Step 06 - Get Busybox</a></li><li class="chapter-item expanded "><a href="07_build_busybox.html"><strong aria-hidden="true">3.10.</strong> Step 07 - Build Busybox</a></li><li class="chapter-item expanded "><a href="08_prepare_bundles.html"><strong aria-hidden="true">3.11.</strong> Step 08 - Prepare Bundles</a></li><li class="chapter-item expanded "><a href="09_generate_rootfs.html"><strong aria-hidden="true">3.12.</strong> Step 09 - Generate Rootfs</a></li><li class="chapter-item expanded "><a href="10_pack_rootfs.html"><strong aria-hidden="true">3.13.</strong> Step 10 - Pack Rootfs</a></li><li class="chapter-item expanded "><a href="11_generate_overlay.html"><strong aria-hidden="true">3.14.</strong> Step 11 - Generate Overlay Structure</a></li><li class="chapter-item expanded "><a href="12_get_syslinux.html"><strong aria-hidden="true">3.15.</strong> Step 12 - Get Syslinux</a></li><li class="chapter-item expanded "><a href="12_get_systemd-boot.html"><strong aria-hidden="true">3.16.</strong> Step 12 - Get systemd-boot</a></li><li class="chapter-item expanded "><a href="13_prepare_iso.html"><strong aria-hidden="true">3.17.</strong> Step 13 - Prepare ISO Structure</a></li><li class="chapter-item expanded "><a href="14_generate_iso.html"><strong aria-hidden="true">3.18.</strong> Step 14 - Generate ISO Image</a></li><li class="chapter-item expanded "><a href="15_generate_image.html"><strong aria-hidden="true">3.19.</strong> Step 15 - Generate Filesystem Image</a></li><li class="chapter-item expanded "><a href="16_cleanup.html"><strong aria-hidden="true">3.20.</strong> Step 16 - Final Cleanup</a></li></ol></li></ol>
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<h1 class="menu-title">Minimal Linux Live</h1>
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<main>
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<h1><a class="header" href="#build-process" id="build-process">Build Process</a></h1>
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<p>The MLL build process can be divided in several major phases. Refer to the <a href="./common.html#properties">common properties</a> for more details on the folders that are referenced below.</p>
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<ul>
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<li><a href="#preparations">Preparations</a></li>
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<li><a href="#kernel">Kernel</a></li>
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<li><a href="#gnu-c-library">GNU C Library</a></li>
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<li><a href="#busybox">Busybox</a></li>
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<li><a href="#overlay-bundles">Overlay bundles</a></li>
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<li><a href="#initramfs">Initramfs</a></li>
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<li><a href="#boot-loader">Boot loader</a></li>
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<li><a href="#iso-image">ISO image</a></li>
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</ul>
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<hr />
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<h2><a class="header" href="#preparations" id="preparations">Preparations</a></h2>
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<ul>
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<li><a href="./00_clean.html">00_clean.sh</a></li>
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</ul>
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<p>Everything from <code>WORK_DIR</code> is removed. All previous MLL build artifacts are lost and the MLL build process can start from scratch. The previously downloaded sources are preserved in order to speed up the process.</p>
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<h2><a class="header" href="#kernel" id="kernel">Kernel</a></h2>
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<ul>
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<li><a href="./01_get_kernel.html">01_get_kernel.sh</a></li>
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<li><a href="./02_build_kernel.html">02_build_kernel.sh</a></li>
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</ul>
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<p>Linux kernel source code is downloaded. <a href="https://www.kernel.org/doc/Documentation/filesystems/overlayfs.txt">OverlayFS</a> and <a href="https://www.kernel.org/doc/Documentation/efi-stub.txt">EFI stub</a> are configured. Kernel is built and the kernel binary, along with the kernel header files are placed in <code>KERNEL_INSTALLED</code>.</p>
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<h2><a class="header" href="#gnu-c-library" id="gnu-c-library">GNU C Library</a></h2>
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<ul>
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<li><a href="./03_get_glibc.html">03_get_glibc.sh</a></li>
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<li><a href="./04_build_glibc.html">04_build_glibc.sh</a></li>
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<li><a href="./05_prepare_sysroot.html">05_prepare_sysroot.sh</a></li>
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</ul>
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<p>GNU C Library source code is downloaded. Build preparations are made in the <code>GLIBC_OBJECTS</code>. GLIBC is built and the final artifacts are placed in <code>GLIBC_INSTALLED</code>. The <code>.so</code> files, along with all GLIBC headers and all kernel headers are placed in <code>SYSROOT</code>.</p>
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<h2><a class="header" href="#busybox" id="busybox">Busybox</a></h2>
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<ul>
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<li><a href="./06_get_busybox.html">06_get_busybox.sh</a></li>
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<li><a href="./07_build_busybox.html">07_build_busybox.sh</a></li>
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</ul>
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<p>Busybox source code is downloaded. The build configuration is tweaked to reference <code>SYSROOT</code>. The final build artifacts are placed in <code>BUSYBOX_INSTALLED</code>.</p>
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<h2><a class="header" href="#overlay-bundles" id="overlay-bundles">Overlay bundles</a></h2>
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<ul>
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<li><a href="./08_prepare_bundles.html">08_prepare_bundles.sh</a></li>
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</ul>
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<p>All overlay bundles that have been enabled in <code>.config</code> are built. The final overlay structure is generated in <code>OVERLAY_ROOTFS</code>.</p>
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<h2><a class="header" href="#initramfs" id="initramfs">Initramfs</a></h2>
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<ul>
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<li><a href="./09_generate_rootfs.html">09_generate_rootfs.sh</a></li>
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<li><a href="./10_pack_rootfs.html">10_pack_rootfs.sh</a></li>
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<li><a href="./11_generate_overlay.html">11_generate_overlay.sh</a></li>
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</ul>
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<p>The installed Busybox artifacts and <code>src/minimal_rootfs/</code> are merged in <code>ROOTFS</code>. The initramfs file <code>WORK_DIR/rootfs.cpio.xz</code> is generated from <code>ROOTFS</code>. The final initramfs ISO image structure for the overlay bundles is generated in <code>ISOIMAGE_OVERLAY</code>.</p>
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<h2><a class="header" href="#boot-loader" id="boot-loader">Boot loader</a></h2>
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<ul>
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<li><a href="./12_get_syslinux.html">12_get_syslinux.sh</a></li>
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<li><a href="./12_get_systemd-boot.html">12_get_systemd-boot.sh</a></li>
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</ul>
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<p>Syslinux and/or systemd-boot are downloaded.</p>
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<h2><a class="header" href="#iso-image" id="iso-image">ISO image</a></h2>
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<ul>
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<li><a href="./13_prepare_iso.html">13_prepare_iso.sh</a></li>
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<li><a href="./14_generate_iso.html">14_generate_iso.sh</a></li>
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<li><a href="./15_generate_image.html">15_generate_image.sh</a></li>
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<li><a href="./16_cleanup.html">16_cleanup.sh</a></li>
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</ul>
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<p>The boot loader for BIOS/UEFI is prepared and the boot configuration artifacts from <code>src/minimal_boot/</code> are properly placed. The final ISO image layout structure is prepared in <code>ISOIMAGE</code>. This directory contains the BIOS/UEFI boot loader, Linux kernel and initramfs, along with all MLL overlay bundles (i.e. additional software and/or configurations) that have been enabled. The ISO image file <code>src/minimal_linux_live.iso</code> is generated. The MLL filesystem image (e.g. use in Docker) <code>src/mll_image.tgz</code> is generated. Final cleanup is performed.</p>
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