Started cleanup & preparation process for publishing. The code has been tested on 32-bit and 64-bit machines.
This commit is contained in:
Ivan Davidov
parent
fb5ab6f49a
commit
b097308669
@ -1,23 +1,23 @@
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#!/bin/sh
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# Grab everything after the '=' character
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# Grab everything after the '=' character.
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DOWNLOAD_URL=$(grep -i KERNEL_SOURCE_URL .config | cut -f2 -d'=')
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# Grab everything after the last '/' character
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# Grab everything after the last '/' character.
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ARCHIVE_FILE=${DOWNLOAD_URL##*/}
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cd source
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# Downloading kernel file
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# -c option allows the download to resume
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# Downloading kernel file.
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# -c option allows the download to resume.
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wget -c $DOWNLOAD_URL
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# Delete folder with previously extracted kernel
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# Delete folder with previously extracted kernel.
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rm -rf ../work/kernel
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mkdir ../work/kernel
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# Extract kernel to folder 'work/kernel'
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# Full path will be something like 'work/kernel/linux-3.16.1'
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# Extract kernel to folder 'work/kernel'.
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# Full path will be something like 'work/kernel/linux-4.4.6'.
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tar -xvf $ARCHIVE_FILE -C ../work/kernel
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cd ..
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@ -2,24 +2,25 @@
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cd work/kernel
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# Change to the first directory ls finds, e.g. 'linux-3.18.6'
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# Change to the first directory ls finds, e.g. 'linux-4.4.6'.
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cd $(ls -d *)
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# Cleans up the kernel sources, including configuration files
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# Cleans up the kernel sources, including configuration files.
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make mrproper
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# Create a default configuration file for the kernel
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# Create default configuration file for the kernel.
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make defconfig
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# Changes the name of the system
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# Changes the name of the system to 'minimal'.
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sed -i "s/.*CONFIG_DEFAULT_HOSTNAME.*/CONFIG_DEFAULT_HOSTNAME=\"minimal\"/" .config
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# Compile the kernel with optimization for "parallel jobs" = "number of processors"
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# Good explanation of the different kernels
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# Compile the kernel with optimization for "parallel jobs" = "number of processors".
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# Good explanation of the different kernels:
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# http://unix.stackexchange.com/questions/5518/what-is-the-difference-between-the-following-kernel-makefile-terms-vmlinux-vmlinux
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make bzImage -j $(grep ^processor /proc/cpuinfo | wc -l)
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# Install kernel headers in "./usr" (this is not "/usr") which are used later.
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# Install kernel headers in './usr' (this is not '/usr') which are used later
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# when we build and configure the GNU C library (glibc).
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make headers_install
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cd ../../..
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@ -1,23 +1,23 @@
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#!/bin/sh
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# Grab everything after the '=' character
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# Grab everything after the '=' character.
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DOWNLOAD_URL=$(grep -i GLIBC_SOURCE_URL .config | cut -f2 -d'=')
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# Grab everything after the last '/' character
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# Grab everything after the last '/' character.
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ARCHIVE_FILE=${DOWNLOAD_URL##*/}
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cd source
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# Downloading musl file
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# -c option allows the download to resume
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# Downloading glibc file.
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# -c option allows the download to resume.
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wget -c $DOWNLOAD_URL
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# Delete folder with previously extracted glibc
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# Delete folder with previously extracted glibc.
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rm -rf ../work/glibc
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mkdir ../work/glibc
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# Extract glibc to folder 'work/glibc'
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# Full path will be something like 'work/glibc/glibc-1.1.11'
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# Extract glibc to folder 'work/glibc'.
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# Full path will be something like 'work/glibc/glibc-2.23'.
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tar -xvf $ARCHIVE_FILE -C ../work/glibc
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cd ..
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@ -1,5 +1,6 @@
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#!/bin/sh
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# Find the kernel build directory.
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cd work/kernel
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cd $(ls -d *)
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WORK_KERNEL_DIR=$(pwd)
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@ -7,29 +8,32 @@ cd ../../..
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cd work/glibc
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# Change to the first directory ls finds, e.g. 'glibc-2.22'
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# Change to the first directory ls finds, e.g. 'glibc-2.23'.
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cd $(ls -d *)
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# Prepare working area, e.g. 'work/glibc/glibc-2.23/glibc_objects'.
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rm -rf ./glibc_objects
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mkdir glibc_objects
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# Prepare installation area, e.g. 'work/glibc/glibc-2.23/glibc_installed'.
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rm -rf ./glibc_installed
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mkdir glibc_installed
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cd glibc_installed
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GLIBC_INSTALLED=$(pwd)
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# All glibc work is done from the working area.
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cd ../glibc_objects
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../configure --prefix= --with-headers=$WORK_KERNEL_DIR/usr/include --disable-werror
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#../configure --prefix=$GLIBC_INSTALLED --with-headers=$WORK_KERNEL_DIR/usr/include --enable-static-ns --disable-werror
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#../configure --prefix=$GLIBC_INSTALLED --with-headers=$WORK_KERNEL_DIR/usr/include --disable-werror
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# glibc is configured to use the root folder (--prefix=) and as result all libraries
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# will be installed in '/lib'. Kernel headers are taken from our already prepared
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# kernel header area (see 02_build_kernel.sh).
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../configure --prefix= --with-headers=$WORK_KERNEL_DIR/usr/include --disable-werror
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# Compile glibc with optimization for "parallel jobs" = "number of processors".
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make -j $(grep ^processor /proc/cpuinfo | wc -l)
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#set DESTDIR=$GLIBC_INSTALLED
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#export DESTDIR
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# Install glibc in the installation area, e.g. 'work/glibc/glibc-2.23/glibc_installed'.
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make install DESTDIR=$GLIBC_INSTALLED -j $(grep ^processor /proc/cpuinfo | wc -l)
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#unset DESTDIR
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cd ../../..
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@ -1,5 +1,6 @@
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#!/bin/sh
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# Find the kernel build directory.
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cd work/kernel
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cd $(ls -d *)
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WORK_KERNEL_DIR=$(pwd)
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@ -12,6 +13,26 @@ cd $(ls -d *)
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cd glibc_installed
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# Create custom 'usr' area and link it with some of the kernel header directories.
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# BusyBox compilation process uses these linked directories. The following
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# directories are affected:
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#
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# usr (glibc)
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# |
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# +--include (glibc)
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# | |
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# | +--asm (kernel)
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# | |
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# | +--asm-generic (kernel)
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# | |
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# | +--asm-generic (kernel)
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# | |
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# | +--linux (kernel)
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# | |
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# | +--mtd (kernel)
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# |
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# +--lib (glibc)
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mkdir -p usr
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cd usr
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@ -37,28 +58,3 @@ ln -s $WORK_KERNEL_DIR/usr/include/mtd mtd
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cd ../../../..
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exit 0
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unlink musl-ar 2>/dev/null
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ln -s `which ar` musl-ar
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unlink musl-strip 2>/dev/null
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ln -s `which strip` musl-strip
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unlink linux 2>/dev/null
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ln -s /usr/include/linux linux
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unlink mtd 2>/dev/null
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ln -s /usr/include/mtd mtd
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if [ -d /usr/include/asm ]
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then
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unlink asm 2>/dev/null
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ln -s /usr/include/asm asm
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else
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unlink asm 2>/dev/null
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ln -s /usr/include/asm-generic asm
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fi
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unlink asm-generic 2>/dev/null
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ln -s /usr/include/asm-generic asm-generic
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@ -1,23 +1,23 @@
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#!/bin/sh
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# Grab everything after the '=' character
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# Grab everything after the '=' character.
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DOWNLOAD_URL=$(grep -i BUSYBOX_SOURCE_URL .config | cut -f2 -d'=')
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# Grab everything after the last '/' character
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# Grab everything after the last '/' character.
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ARCHIVE_FILE=${DOWNLOAD_URL##*/}
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cd source
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# Downloading busybox source
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# -c option allows the download to resume
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# Downloading busybox source.
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# -c option allows the download to resume.
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wget -c $DOWNLOAD_URL
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# Delete folder with previously extracted busybox
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# Delete folder with previously extracted busybox.
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rm -rf ../work/busybox
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mkdir ../work/busybox
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# Extract busybox to folder 'busybox'
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# Full path will be something like 'work/busybox/busybox-1.23.1'
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# Extract busybox to folder 'busybox'.
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# Full path will be something like 'work/busybox/busybox-1.24.2'.
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tar -xvf $ARCHIVE_FILE -C ../work/busybox
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cd ..
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@ -1,57 +1,40 @@
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#!/bin/sh
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# Find the glibc installation area.
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cd work/glibc
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cd $(ls -d *)
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cd glibc_installed
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GLIBC_INSTALLED=$(pwd)
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cd ../../../..
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cd work/busybox
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# Change to the first directory ls finds, e.g. 'busybox-1.23.1'
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# Change to the first directory ls finds, e.g. 'busybox-1.24.2'.
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cd $(ls -d *)
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#PATH_BACKUP=$PATH
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#PATH=$GLIBC_INSTALLED:$PATH
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# Remove previously generated artifacts
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# Remove previously generated artifacts.
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make distclean
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# Create a default configuration file
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# Create default configuration file.
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make defconfig
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# Change the configuration, so that busybox is statically compiled
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# You could do this manually with 'make menuconfig'
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#
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# Uncomment for static build.
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#
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#sed -i "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config
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# This variable holds the full path to the glibc installation area as quoted string.
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# All back slashes are escaped (/ => \/) in order to keep the 'sed' command stable.
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GLIBC_INSTALLED_ESCAPED=$(echo \"$GLIBC_INSTALLED\" | sed 's/\//\\\//g')
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#echo $GLIBC_INSTALLED_ESCAPED
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#exit 0
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# Uncomment after some tests
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#
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# Now we tell BusyBox to use the glibc installation area.
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sed -i "s/.*CONFIG_SYSROOT.*/CONFIG_SYSROOT=$GLIBC_INSTALLED_ESCAPED/" .config
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#exit 0
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#sed -i "s/.*CONFIG_CROSS_COMPILER_PREFIX.*/CONFIG_CROSS_COMPILER_PREFIX=\"uclibc-\"/" .config
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#sed -i "s/.*CONFIG_IFPLUGD.*/CONFIG_IFPLUGD=n/" .config
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# The 'inetd' applet fails to compile because we use the glibc installation area as
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# main pointer to the kernel headers (see 05_prepare_glibc.sh) and some headers are
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# not resolved. The easiest solution is to ignore this particular applet.
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sed -i "s/.*CONFIG_INETD.*/CONFIG_INETD=n/" .config
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#sed -i "s/.*CONFIG_FEATURE_WTMP.*/CONFIG_FEATURE_WTMP=n/" .config
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# Compile busybox with optimization for "parallel jobs" = "number of processors"
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# Compile busybox with optimization for "parallel jobs" = "number of processors".
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make busybox -j $(grep ^processor /proc/cpuinfo | wc -l)
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# Create the symlinks for busybox
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# It uses the file 'busybox.links' for this
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# Create the symlinks for busybox. The file 'busybox.links' is used for this.
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make install
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#PATH=$PATH_BACKUP
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cd ../../..
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@ -1,5 +1,6 @@
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#!/bin/sh
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# Find the glibc installation area.
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cd work/glibc
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cd $(ls -d *)
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cd glibc_installed
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@ -12,13 +13,15 @@ cd work
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rm -rf rootfs
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cd busybox
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# Change to the first directory ls finds, e.g. 'busybox-1.24.2'.
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cd $(ls -d *)
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# Copy all BusyBox generated stuff to the location of our "initramfs" folder.
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# Copy all BusyBox generated stuff to the location of our 'initramfs' folder.
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cp -R _install ../../rootfs
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cd ../../rootfs
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# Remove "linuxrc" which is used when we boot in "RAM disk" mode.
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# Remove 'linuxrc' which is used when we boot in 'RAM disk' mode.
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rm -f linuxrc
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# Create root FS folders.
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@ -31,13 +34,13 @@ mkdir src
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mkdir sys
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mkdir tmp
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# "1" means that only the owner of a file/directory (or root) can remove it.
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# '1' means that only the owner of particular file/directory can remove it.
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chmod 1777 tmp
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cd etc
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# The script "/etc/bootscript.sh" is automatically executed as part of the
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# "init" proess. We suppress most kernel messages, mount all crytical file
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# The script '/etc/bootscript.sh' is automatically executed as part of the
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# 'init' proess. We suppress most kernel messages, mount all crytical file
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# systems, loop through all available network devices and we configure them
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# through DHCP.
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cat > bootscript.sh << EOF
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@ -57,7 +60,7 @@ EOF
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chmod +x bootscript.sh
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# The script "/etc/rc.dhcp" is automatically invoked for each network device.
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# The script '/etc/rc.dhcp' is automatically invoked for each network device.
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cat > rc.dhcp << EOF
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#!/bin/sh
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@ -71,14 +74,14 @@ EOF
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chmod +x rc.dhcp
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# DNS resolving is done by using Google's public DNS servers
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# DNS resolving is done by using Google's public DNS servers.
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cat > resolv.conf << EOF
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nameserver 8.8.8.8
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nameserver 8.8.4.4
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EOF
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# The file "/etc/welcome.txt" is displayed on every boot of the system in each
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# The file '/etc/welcome.txt' is displayed on every boot of the system in each
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# available terminal.
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cat > welcome.txt << EOF
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@ -90,7 +93,7 @@ cat > welcome.txt << EOF
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EOF
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# The file "/etc/inittab" contains the configuration which defines how the
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# The file '/etc/inittab' contains the configuration which defines how the
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# system will be initialized. Check the following URL for more details:
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# http://git.busybox.net/busybox/tree/examples/inittab
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cat > inittab << EOF
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@ -110,8 +113,8 @@ EOF
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cd ..
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# The "/init" script passes the execution to "/sbin/init" which in turn looks
|
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# for the configuration file "/etc/inittab".
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# The '/init' script passes the execution to '/sbin/init' which in turn looks
|
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# for the configuration file '/etc/inittab'.
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cat > init << EOF
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#!/bin/sh
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@ -121,7 +124,7 @@ EOF
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chmod +x init
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# Copy all source files to "/src". Note that the scripts won't work there.
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# Copy all source files to '/src'. Note that the scripts won't work there.
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cp ../../*.sh src
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cp ../../.config src
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cp ../../*.txt src
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@ -129,16 +132,23 @@ chmod +rx src/*.sh
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chmod +r src/.config
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chmod +r src/*.txt
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# Copy the necessary 'glibc' libraries for proper DNS resolving.
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# Copy all necessary 'glibc' libraries to '/lib' BEGIN.
|
||||
|
||||
# This is the dynamic loader. The file name is different for 32-bit and 64-bit machines.
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cp $GLIBC_INSTALLED/lib/ld-linux* ./lib
|
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|
||||
# BusyBox has direct dependencies on these libraries.
|
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cp $GLIBC_INSTALLED/lib/libm.so.6 ./lib
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cp $GLIBC_INSTALLED/lib/libc.so.6 ./lib
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cp $GLIBC_INSTALLED/lib/ld-linux* ./lib
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|
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# These libraries are necessary for the DNS resolving.
|
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cp $GLIBC_INSTALLED/lib/libresolv.so.2 ./lib
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cp $GLIBC_INSTALLED/lib/libnss_dns.so.2 ./lib
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||||
|
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|
||||
# Make sure x86_64 binaries can be loaded (for 64bit machines).
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||||
# Make sure the dynamic loader is visible on 64-bit machines.
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ln -s lib lib64
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# Copy all necessary 'glibc' libraries to '/lib' END.
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||||
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||||
cd ../..
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||||
|
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@ -2,12 +2,12 @@
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cd work
|
||||
|
||||
# Remove the old initramfs archive if it exists.
|
||||
# Remove the old 'initramfs' archive if it exists.
|
||||
rm -f rootfs.cpio.gz
|
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|
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cd rootfs
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||||
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# Packs the current folder structure in "cpio.gz" archive.
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# Packs the current 'initramfs' folder structure in 'cpio.gz' archive.
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find . | cpio -R root:root -H newc -o | gzip > ../rootfs.cpio.gz
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|
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cd ../..
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||||
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@ -1,14 +1,18 @@
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#!/bin/sh
|
||||
|
||||
# Find the kernel build directory.
|
||||
cd work/kernel
|
||||
cd $(ls -d *)
|
||||
WORK_KERNEL_DIR=$(pwd)
|
||||
cd ../../..
|
||||
|
||||
# Remove the old ISO file if it exists.
|
||||
rm -f minimal_linux_live.iso
|
||||
|
||||
# Remove the old ISO generation area if it exists.
|
||||
rm -rf work/isoimage
|
||||
|
||||
# This is the root folder of the ISO image
|
||||
# This is the root folder of the ISO image.
|
||||
mkdir work/isoimage
|
||||
cd work/isoimage
|
||||
|
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@ -24,13 +28,13 @@ for i in lib lib64 share end ; do
|
||||
if [ $i = end ]; then exit 1; fi;
|
||||
done
|
||||
|
||||
# Now we copy the kernel
|
||||
# Now we copy the kernel.
|
||||
cp $WORK_KERNEL_DIR/arch/x86/boot/bzImage ./kernel.bz
|
||||
|
||||
# Now we copy the root file system
|
||||
# Now we copy the root file system.
|
||||
cp ../rootfs.cpio.gz ./rootfs.gz
|
||||
|
||||
# Copy all source files to "/src". Note that the scripts won't work there.
|
||||
# Copy all source files to '/src'. Note that the scripts won't work there.
|
||||
mkdir src
|
||||
cp ../../*.sh src
|
||||
cp ../../.config src
|
||||
@ -39,16 +43,16 @@ chmod +rx src/*.sh
|
||||
chmod +r src/.config
|
||||
chmod +r src/*.txt
|
||||
|
||||
# Create ISOLINUX configuration file
|
||||
# Create ISOLINUX configuration file.
|
||||
echo 'default kernel.bz initrd=rootfs.gz' > ./isolinux.cfg
|
||||
|
||||
# Now we generate the ISO image file
|
||||
# Now we generate the ISO image file.
|
||||
genisoimage -J -r -o ../minimal_linux_live.iso -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table ./
|
||||
|
||||
# This allows the ISO image to be bootable if it is burned on USB flash drive
|
||||
# This allows the ISO image to be bootable if it is burned on USB flash drive.
|
||||
isohybrid ../minimal_linux_live.iso 2>/dev/null || true
|
||||
|
||||
# Copy the ISO image to the root project folder
|
||||
# Copy the ISO image to the root project folder.
|
||||
cp ../minimal_linux_live.iso ../../
|
||||
|
||||
cd ../..
|
||||
|
||||
@ -3,9 +3,9 @@
|
||||
sh 00_prepare.sh
|
||||
sh 01_get_kernel.sh
|
||||
sh 02_build_kernel.sh
|
||||
sh 03_get_musl.sh
|
||||
sh 04_build_musl.sh
|
||||
sh 05_prepare_musl.sh
|
||||
sh 03_get_glibc.sh
|
||||
sh 04_build_glibc.sh
|
||||
sh 05_prepare_glibc.sh
|
||||
sh 06_get_busybox.sh
|
||||
sh 07_build_busybox.sh
|
||||
sh 08_generate_rootfs.sh
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user