User:Seedofonan/CLFS Notes
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Instructions from LFS 11.1
These instructions work on a Funtoo stage3-amd64-k10-1.4-release-std-2022-03-11.tar.xz system with nothing further installed except fchroot. A low-privilege account with a suitably hygenic environment is used, such as the "lfs" user. Additionally, all LFS packages/patches are already downloaded and located in $LFSHOWTO/sources. To demonstrate that this recipe works for targeting an arbitrary system, I've chosen the Raspberry Pi 4B but everything compiled as thumb2. TBD: Show diffs from original recipe to alternate targets (it's not much, really).
user $ export LFS_TGT=armv7l-linux-gnueabihf user $ export LFSHOWTO=~/Documents/LFS-HowTo/thumb-r11.1 user $ export LFS=/tmp/lfs user $ export LC_ALL=POSIX user $ export PATH=$LFS/tools/bin:/bin:/usr/bin user $ export CONFIG_SITE=$LFS/usr/share/config.site user $ export MAKEFLAGS='-j4' #tailor for your number of processor cores user $ set +h #turns off bash's hash function user $ umask 022 #anyone can read but only this user can modify # ==== # 2.7. Mounting the New Partition # ==== user $ mkdir -v $LFS # ==== # 3.1. Introduction # ==== user $ cp -rv $LFSHOWTO/sources $LFS # ==== # 4.2. Creating a limited directory layout in LFS filesystem # ==== user $ mkdir -v $LFS/{etc,tools,usr,var} $LFS/usr/{bin,lib,sbin} user $ for i in bin lib sbin; do user $ ln -sv usr/$i $LFS/$i user $ done
LFS Chapter 5 & 6 - Temporary tools
In the beginning of Chapter 5 the LFS recipe first compiles a cross gcc toolchain and installs it into $LFS/tools.
5.2. Binutils-2.38 - Pass 1 5.3. GCC-11.2.0 - Pass 1
Then for the remainder of Chapter 5 and all of Chapter 6 this cross-compiler is used to create everything the target needs to (f)chroot and build all the LFS packages. Note that everything built by the cross compiler gets re-compiled and replaced in Chapter 8, as indicated in square brackets.
5.4. Linux-5.16.9 API Headers 5.5.[8.5] Glibc-2.35 5.6.[7.7] Libstdc++ from GCC-11.2.0, Pass 1 6.2.[8.12] M4-1.4.19 6.3.[8.28] Ncurses-6.3 6.4.[8.34] Bash-5.1.16 6.5.[8.53] Coreutils-9.0 6.6.[8.55] Diffutils-3.8 6.7.[8.10] File-5.41 6.8.[8.57] Findutils-4.9.0 6.9.[8.56] Gawk-5.1.1 6.10.[8.33] Grep-3.7 6.11.[8.60] Gzip-1.11 6.12.[8.64] Make-4.3 6.13.[8.65] Patch-2.7.6 6.14.[8.29] Sed-4.8 6.15.[8.66] Tar-1.34 6.16.[8.8] Xz-5.2.5 6.17.[8.18] Binutils-2.38 - Pass 2 6.18.[GMP:8.19 MPFR:8.20 MPC:8.21 GCC:8.26] GCC-11.2.0 - Pass 2
LFSr11.1-chapter5and6.sh (bash source code) - Chapter 5 and Chapter 6LFS Chapter 7 - Chroot
At this point, the cross-compiler folder $LFS/tools can be deleted. The remainder of packages in Chapter 7 and all of those in Chapter 8 are built while (f)chroot'ed and so have no way to execute anything other than those built above.
7.7. Libstdc++ from GCC-11.2.0, Pass 2 7.8.[8.31] Gettext-0.21 7.9.[8.32] Bison-3.8.2 7.10. Perl-5.34.0 7.11.[8.50] Python-3.10.2 7.12.[8.67] Texinfo-6.8 7.13.[8.72] Util-linux-2.37.4
user $ rm -r $LFS/tools user $ su - root #because no sudo
# ========== # Chapter 7. Entering Chroot and Building Additional Temporary Tools # ========== root # export LFS=/tmp/lfs/ #NOTE trailing '/' root # export LFS_TGT=armv7l-linux-gnueabihf # 7.2. Changing Ownership root # chown -R root:root "$LFS"{usr,lib,var,etc,bin,sbin} # 7.3. Preparing Virtual Kernel File Systems root # mkdir -pv "$LFS"{dev,proc,sys,run} # 7.3.1. Creating Initial Device Nodes root # mknod -m 600 "$LFS"dev/console c 5 1 root # mknod -m 666 "$LFS"dev/null c 1 3 # 7.3.2. Mounting and Populating /dev root # mount -v --bind /dev "$LFS"dev #unnecessary, done by fchroot root # 7.3.3. Mounting Virtual Kernel File Systems root # mount -v --bind /dev/pts "$LFS"dev/pts #unnecessary, done by fchroot root # mount -vt proc proc "$LFS"proc #unnecessary, done by fchroot root # mount -vt sysfs sysfs "$LFS"sys #unnecessary, done by fchroot root # mount -vt tmpfs tmpfs "$LFS"run # 7.4. Entering the Chroot Environment root # fchroot "$LFS" /usr/bin/env -i \ root # HOME=/root \ root # TERM="$TERM" \ root # PS1='(lfs chroot) \u:\w\$ ' \ root # PATH=/usr/bin:/usr/sbin \ root # LFS_TGT="$LFS_TGT" \ root # /bin/bash --login
chroot # export MAKEFLAGS='-j4' #tailor for your number of processor cores chroot # cd /sources
LFSr11.1-chapter7.sh (bash source code) - Chapter 7LFS Chapter 8 - (re-)Build Everything (except Libstdc++ and perl)
In Chapter 8 LFS begins the testing of packages before installing them. Note that the final cross-compiled package isn't replaced until 8.66, nearly at the end and only right after other important tools like make and patch. TBD: Eliminate unneded packages.
8.3. Man-pages-5.13 8.4. Iana-Etc-20220207 8.5. Glibc-2.35 8.6. Zlib-1.2.11 8.7. Bzip2-1.0.8 8.8. Xz-5.2.5 8.9. Zstd-1.5.2 8.10. File-5.41 8.11. Readline-8.1.2 8.12. M4-1.4.19 8.13. Bc-5.2.2 8.14. Flex-2.6.4 8.15. Tcl-8.6.12 8.16. Expect-5.45.4 8.17. DejaGNU-1.6.3 8.18. Binutils-2.38 - Pass 3 8.19. GMP-6.2.1 8.20. MPFR-4.1.0 8.21. MPC-1.2.1 8.22. Attr-2.5.1 8.23. Acl-2.3.1 8.24. Libcap-2.63 8.25. Shadow-4.11.1 8.26. GCC-11.2.0 8.27. Pkg-config-0.29.2 8.28. Ncurses-6.3 8.29. Sed-4.8 8.30. Psmisc-23.4 8.31. Gettext-0.21 8.32. Bison-3.8.2 8.33. Grep-3.7 8.34. Bash-5.1.16 8.35. Libtool-2.4.6 8.36. GDBM-1.23 8.37. Gperf-3.1 8.38. Expat-2.4.6 8.39. Inetutils-2.2 8.40. Less-590 8.42. XML::Parser-2.46 8.43. Intltool-0.51.0 8.44. Autoconf-2.71 8.45. Automake-1.16.5 8.46. OpenSSL-3.0.1 8.47. Kmod-29 8.48. Libelf from Elfutils-0.186 8.49. Libffi-3.4.2 8.50. Python-3.10.2 8.51. Ninja-1.10.2 8.52. Meson-0.61.1 8.53. Coreutils-9.0 8.54. Check-0.15.2 8.55. Diffutils-3.8 8.56. Gawk-5.1.1 8.57. Findutils-4.9.0 8.58. Groff-1.22.4 8.59. GRUB-2.06 8.60. Gzip-1.11 8.61. IPRoute2-5.16.0 8.62. Kbd-2.4.0 8.63. Libpipeline-1.5.5 8.64. Make-4.3 8.65. Patch-2.7.6 8.66. Tar-1.34 8.67. Texinfo-6.8 8.68. Vim-8.2.4383 8.69. Eudev-3.2.11 8.70. Man-DB-2.10.1 8.71. Procps-ng-3.3.17 8.72. Util-linux-2.37.4 8.73. E2fsprogs-1.46.5 8.74. Sysklogd-1.5.1 8.75. Sysvinit-3.01
LFSr11.1-chapter8.sh (bash source code) - Chapter 8# ===== # 8.77. Stripping # ===== chroot # save_usrlib="$(cd /usr/lib; ls ld-linux*) chroot # libc.so.6 chroot # libthread_db.so.1 chroot # libquadmath.so.0.0.0 chroot # libstdc++.so.6.0.29 chroot # libitm.so.1.0.0 chroot # libatomic.so.1.2.0" chroot # cd /usr/lib chroot # for LIB in $save_usrlib; do chroot # objcopy --only-keep-debug $LIB $LIB.dbg chroot # cp $LIB /tmp/$LIB chroot # strip --strip-unneeded /tmp/$LIB chroot # objcopy --add-gnu-debuglink=$LIB.dbg /tmp/$LIB chroot # install -vm755 /tmp/$LIB /usr/lib chroot # rm /tmp/$LIB chroot # done chroot # online_usrbin="bash find strip" chroot # online_usrlib="libbfd-2.38.so chroot # libhistory.so.8.1 chroot # libncursesw.so.6.3 chroot # libm.so.6 chroot # libreadline.so.8.1 chroot # libz.so.1.2.11 chroot # $(cd /usr/lib; find libnss*.so* -type f)" chroot # for BIN in $online_usrbin; do chroot # cp /usr/bin/$BIN /tmp/$BIN chroot # strip --strip-unneeded /tmp/$BIN chroot # install -vm755 /tmp/$BIN /usr/bin chroot # rm /tmp/$BIN chroot # done chroot # for LIB in $online_usrlib; do chroot # cp /usr/lib/$LIB /tmp/$LIB chroot # strip --strip-unneeded /tmp/$LIB chroot # install -vm755 /tmp/$LIB /usr/lib chroot # rm /tmp/$LIB chroot # done chroot # for i in $(find /usr/lib -type f -name \*.so* ! -name \*dbg) \ chroot # $(find /usr/lib -type f -name \*.a) \ chroot # $(find /usr/{bin,sbin,libexec} -type f); do chroot # case "$online_usrbin $online_usrlib $save_usrlib" in chroot # *$(basename $i)* ) chroot # ;; chroot # * ) strip --strip-unneeded $i chroot # ;; chroot # esac chroot # done chroot # unset BIN LIB save_usrlib online_usrbin online_usrlib chroot # cd ../..
TBD: Build missing stuff & Portage
chroot # exit
root # umount -v "$LFS"run root # exit
user $ cd $LFS