Static Linux From Scratch with musl.
Build a fully static chroot environment based on LFS and musl.
Target is amd64/x86_64.
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Follow LFS up to chapter 4. Create lfs user and group.
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As user lfs, checkout this repo and run the scripts.
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Run ipalfs-download-packages.sh to retrieve the needed packages.
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Optionally you can create a tarball of the lfs directory after each build step.
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ipalfs-chapter5.sh automates chapter 5.
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ipalfs-chapter6a and 6b automate chapter 6.
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You now have a chrootable directory lfs without shared libraries or dynamically linked binaries.
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The tools directory can be deleted.
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From now on you can follow the LFS instructions and change ownership, add dev, proc, etc, passwd file, and so on. Note that some later steps need /proc and possibly /dev and /sys.
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Copy chapter7 and chapter8 files, all patches and both python-setup.txt to $LFS/root
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As root, run:
chroot /home/lfs/lfs env -i HOME=/root PATH=/sbin:/bin TERM=ansi PS1='[(chroot) \u \w]# ' /bin/bash --login -
Run ipalfs-chapter7a which creates some files we need
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ipalfs-chapter7b compiles the last temporary libraries and tools
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Leave chroot and make a backup of the roofs
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Enter chroot again (note: we need /proc and /dev mounted for expect and inetutils to work and/or build correctly)
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Run ipalfs-chapter8a to start building the actual chroot environment
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Continue with chapter8b and 8c
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This concludes the basic chroot. The contents of /root and /packages can be deleted. All files in /bin and /sbin should be stripped and /lib contains only static libraries.
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Make a backup tarball of the rootfs before you continue. Remember to unmount /proc, /dev/ and /sys first!
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Note that ksyslogd, eudev (systemd fork libtool abomination), Meson and Wheel are missing. I don't need them. YMMV. ksyslogd's codebase won't build with a modern standards compliant musl and there is no configure. eudev has numerous problems with link order, libtool and its systemd heritage. Wheel runs stuff intended for macos X unconditionally and relies on ctypes which is not available when there is no dynamic loader. Could be patched out. Meson depends on Wheel, hence no Meson.
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Extra packages are standalone argp, musl-fts and musl-obstack.
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All documentation is either not installed or removed.
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Add
export TZ=$(cat /etc/timezone)to /root/.profile for correct time and date. Defaults to Europe/Amsterdam.
- chapter5: 17m17.809s
- chapter6a: 9m20.996s
- chapter6b: 18m44.842s
- chapter7a: 0m0.218s
- chapter7b: 16m7.881s
- chapter8a: 24m42.194s
- chapter8b: 15m43.402s
- chapter8c: 21m25.474s
Total: circa 124 minutes, just over two hours.
0 bin
4.0K dev
816K etc
0 lib
0 lib64
0 proc
16K root
4.0K run
0 sbin
4.0K sys
8.0K tmp
1.1G usr <--- except for /etc, everything is here
12K var
/usr
217M bin
30M include
476M lib
0 lib64
196M libexec
30M sbin
151M share