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131 lines
4.9 KiB
131 lines
4.9 KiB
Current LFS version: 10.0
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Substantial changes were introduced in LFS 10.0, so these notes will probably
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not apply to anything below this version. This version should be easier to
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bootstrap like this, anyway.
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Ignore the Host System Requirements, a lot of these either don't apply or will
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be procured as we go through this guide.
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Ignore, as well, the creation of a new partition or user, as the necessary
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tools to achieve this aren't available in the bootstrap toolset. We will be
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building everything on whatever partition the bootstrap toolset was installed.
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Install the sources under /sources right next to the /bootstrap directory.
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This can't be done when inside the bootstrap system as no networking utilities
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are yet installed. For the "xz" package, download a .tar.gz or .tar.bz2
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package, as the xz utilities aren't included with the bootstrap utilities.
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To enter the bootstrap system as a chroot, use the following commands to set
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up the filesystems and entering:
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mkdir -p sys proc dev tmp
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mount -o ro -t devtmpfs devtmpfs dev
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mount -o ro -t devpts devpts dev/pts
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mount -o ro -t sysfs sysfs sys
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mount -o ro -t proc proc proc
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./bootstrap/bin/chroot . /bootstrap/bin/env -i PATH=/bootstrap/bin HOME=/root /bin/sh -l
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Set the LFS variable to either / or keep it blank, as the bootstrap tools are
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self-contained in /bootstrap, and can be removed afterwards, keeping a clean
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system anyway.
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The bootstrap tools are all x86, if you're going to be cross-compiling for
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x86_64, make sure the command `uname -m` returns `x86_64`, or manually
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substitute it throughout the LFS commands you execute.
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In chapter 4.4 Setting Up the Environment, make sure LFS is set according to
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what's been explained, and PATH=$LFS/tools/bin:/bootstrap/bin. We don't want
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to use /usr/bin and /bin until chapter 7. Also define LFS_TGT after setting PATH.
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Also `mkdir /root` before creating the files. If you don't want the "I have no
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name!" prompt, you shouldn't use '\u' in the PS1 variable.
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A finished bashrc/bash_profile looks like:
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mkdir -p /root
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cat > ~/.bash_profile << "EOF"
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exec env -i HOME=$HOME TERM=$TERM PS1='\w\$ ' /bin/bash
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EOF
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cat > ~/.bashrc << "EOF"
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set +h
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umask 022
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LFS=
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LC_ALL=POSIX
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PATH=$LFS/tools/bin:/bootstrap/bin
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LFS_TGT=$(uname -m)-lfs-linux-gnu
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export LFS LC_ALL LFS_TGT PATH
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EOF
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source ~/.bash_profile
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Once you get to chapter 5, you will need to add a couple of tools to the
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/bootstrap toolset, by building them from the sources you've downloaded for LFS.
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You'll need to build the following packages:
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- xz-5.2.5 (required to unpack .tar.xz archives)
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- sed-4.8 (required by linux-headers for -E option)
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- m4-1.4.18 (required by bison)
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- bison-3.7.1 (required by glibc)
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- grep-3.4 (required by glibc for -o option)
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- make-4.3 (required by glibc)
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- Python-3.8.5 (required by glibc)
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Install them by unpacking them (see "General Compilation Instructions" chapter),
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and running:
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./configure --prefix=/bootstrap --build=i686-pc-linux-gnu
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make
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make install
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Python with:
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./configure --prefix=/bootstrap --build=i686-pc-linux-gnu --without-ensurepip
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Now, you can run chapter 5 and 6, with the following exceptions:
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5.3. GCC-10.2.0 - Pass 1:
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Add --with-stage1-libs='-lstdc++ -lsupc++' CC='gcc -std=c11'
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to the ../configure command.
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6.3. Ncurses-6.2:
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Use --disable-stripping during "main" ./configure
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6.4. Bash-5.0:
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Do not move bash to /bin or replace the /bin/sh symlink. We'll do this
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later.
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Once you reach chapter 7, run the finishing bash install commands we skipped earlier:
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mv $LFS/usr/bin/bash $LFS/bin/bash
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ln -sfv bash $LFS/bin/sh
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Now, if you're cross-building for x86_64, this is the point where you should
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make sure you're either already running a compatible kernel, or you reboot
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into one. You might be able to build one with the tools in /bootstrap and
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/tools, but this guide won't cover this. Booting into this system instead of
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chrooting will also require extra steps, not covered here.
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You may skip chapters 7.1 and 7.2, since we've built everything as root, and
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7.3 may be skipped as well as we've already set up the chroot. However, you
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should set up the PATH variable as described in chapter 7.4, by for example
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modifying your bashrc:
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cat > ~/.bash_profile << "EOF"
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exec env -i HOME=$HOME TERM=$TERM PS1='\u:\w\$ ' /bin/bash
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EOF
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cat > ~/.bashrc << "EOF"
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set +h
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umask 022
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PATH=/bin:/usr/bin:/sbin:/usr/sbin
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export PATH
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EOF
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source ~/.bash_profile
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Chapter 7.5 onwards can be followed without any modifications. This is all
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standard LFS stuff from here on.
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It's probably not related to this specific bootstrap, but I had to run the
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following extra commands during the remaining chapters:
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7.10. Perl-5.32.0:
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Run the following command after sh Configure:
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echo '#define MB_LEN_MAX 16' >> config.h
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7.13. Util-linux-2.36:
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Run the following command after ./configure:
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echo '#define SSIZE_MAX LONG_MAX' >> config.h
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8.15. M4-1.4.18:
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Run the following command after ./configure:
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echo '#define MB_LEN_MAX 16' >> lib/config.h
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