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Add GCC bootstrap from MesCC 

Based on guix' gnu/packages/commencement.scm, revision b85863f7ce99d05205e57358b36ff50656cca08b
master
mid-kid 4 years ago
parent
3dc29cc300
commit
cd08859302
21 changed files with 3837 additions and 0 deletions
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  1. 5
      gcc/binaries.sha1
  2. 37
      gcc/build.sh
  3. 181
      gcc/build_binaries.sh
  4. 873
      gcc/build_bootstrap.sh
  5. 431
      gcc/build_cross.sh
  6. 3
      gcc/builds.sha1
  7. 1167
      gcc/busybox-config
  8. 13
      gcc/download.sh
  9. 33
      gcc/notes/busybox_programs.txt
  10. 15
      gcc/notes/gentoo/gentoo.sha1
  11. 15
      gcc/notes/gentoo/gentoo.wget-list
  12. 30
      gcc/notes/gentoo/gentoo_gen.sh
  13. 187
      gcc/notes/gentoo/gentoo_notes.txt
  14. 116
      gcc/notes/gentoo/gentoo_notes_lfs.txt
  15. 182
      gcc/notes/gentoo/gentoo_notes_nogcc.txt
  16. 218
      gcc/notes/gentoo/gentoo_tools.sh
  17. 131
      gcc/notes/lfs_notes.txt
  18. 24
      gcc/notes/mktemp.txt
  19. 98
      gcc/notes/scrapped.sh
  20. 39
      gcc/sources.sha1
  21. 39
      gcc/sources.wget-list

5
gcc/binaries.sha1
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81189d0d0095c044b3113dd38f0e8e195627cd06 bin/busybox
34b500b18659b9331d4225eb6734be2ce8990589 mes/bin/blood-elf
7ebbf5dcf1d66966d0609fc09d4279c3d247c16b mes/bin/hex2
2cc482ca6cbafc33cbc856384ed5685887c27120 mes/bin/M1
de1e6f6cffcf5660b4b2586c2e5031fd82fa0646 mes/bin/mes

37
gcc/build.sh
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#!/bin/sh
set -e
# Use qemu if necessary
#qemu=qemu-i386
qemu=
rm -rf system
mkdir -p builds
# Stage 1: Build matching mes and busybox binaries
./build_binaries.sh
mv system/binaries.tar.gz builds/ # Will be regenerated later, to match.
# Stage 2: Bootstrap system from these
mkdir -p system/sources/
cp -av sources/* system/sources/
cp build_bootstrap.sh system/sources/
mkdir system/dev system/tmp
mknod system/dev/null c 1 3
mknod system/dev/tty c 5 0
$qemu system/bin/busybox chroot system /bin/busybox env -i NPROC="$(nproc)" /bin/busybox sh /sources/build_bootstrap.sh
mv system/bootstrap.tar.gz builds/
# Stage 2.5 (optional): Rebuild bootstrap binaries to have a "clean" archive
if [ "$1" = double_bootstrap ]; then
cp build_binaries.sh binaries.sha1 busybox-config system/
$qemu system/bootstrap/bin/chroot system /bootstrap/bin/env -i NPROC="$(nproc)" PATH=/bootstrap/bin /bootstrap/bin/sh /build_binaries.sh
mv system/system/binaries.tar.gz builds/
rm system/build_binaries.sh system/binaries.sha1 system/busybox-config
rm -rf system/system/
fi
# Stage 3: Cross-compile system for x86_64
cp build_cross.sh system/sources
$qemu system/bootstrap/bin/chroot system /bootstrap/bin/env -i NPROC="$(nproc)" /bootstrap/bin/sh /sources/build_cross.sh
mv system/system/cross.tar.gz builds/

181
gcc/build_binaries.sh
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#!/bin/sh
set -eu
version_mes=0.22
version_mescc_tools=1.0.1
version_nyacc=0.99.3
version_linux=4.14
version_binutils=2.20.1
version_gcc=4.9.4
version_gmp=4.3.2
version_mpfr=2.4.2
version_mpc=1.0.3
version_musl=1.2.1
version_busybox=1.31.1
export MAKEFLAGS="-j${NPROC:-$(getconf _NPROCESSORS_ONLN)}"
system=system
dir_root="$PWD"
dir_sources="$dir_root/sources"
dir_install="$dir_root/$system"
mkdir -p build && cd build
rm -rf "mes-$version_mes"
tar xf "$dir_sources/mes-$version_mes.tar.gz"
( cd "mes-$version_mes"
tar xf "$dir_sources/mescc-tools-Release_$version_mescc_tools.tar.gz"
tar xf "$dir_sources/nyacc-$version_nyacc.tar.gz"
mv "mescc-tools-Release_$version_mescc_tools" mescc-tools
mv "nyacc-$version_nyacc" nyacc
cp -a mescc-tools mescc-tools-target
make -C mescc-tools M1 hex2 blood-elf COMMIT=
export PATH="$PWD/mescc-tools/bin:$PATH"
# First, we build a native mes, "mes-gcc".
# This allows us to cross-build everything on systems that mes doesn't support.
gcc -O2 -std=gnu99 -w -lrt -o mes-gcc -DMES_VERSION='""' -DSYSTEM_LIBC=1 -Iinclude \
lib/mes/eputs.c \
lib/mes/fdgetc.c \
lib/mes/fdputc.c \
lib/mes/fdputs.c \
lib/mes/fdungetc.c \
lib/mes/itoa.c \
lib/mes/mes_open.c \
lib/mes/ntoab.c \
src/gc.c \
src/hash.c \
src/lib.c \
src/math.c \
src/mes.c \
src/module.c \
src/posix.c \
src/reader.c \
src/string.c \
src/struct.c \
src/vector.c
# This version of mes messes doesn't have a proper getopt...
# TODO: Fix this (somehow) and make the patch unnecessary.
sed -i -e 's/ -nostdlib/ --nostdlib/' \
-e 's/ -lc/ -l c/' \
build-aux/bootstrap.sh.in
# Use this to build mes and its libc for the target
CC=true guile_site_dir="$PWD/nyacc/module" sh configure.sh --host=x86-linux-mes
CC="$PWD/scripts/mescc" MES="$PWD/mes-gcc" sh bootstrap.sh
# Install mes
install -Dm755 bin/mes "$dir_install/mes/bin/mes"
# Build tools with mes to obtain reproducible outputs
make -C mescc-tools-target M1 hex2 blood-elf COMMIT= \
CC="$PWD/scripts/mescc" MES="$PWD/mes-gcc" MES_PREFIX="../" \
GUILE_LOAD_PATH="../module" CFLAGS='-L ../lib -L ../mescc-lib -l c+tcc'
install -Dm755 mescc-tools-target/bin/M1 "$dir_install/mes/bin/M1"
install -Dm755 mescc-tools-target/bin/hex2 "$dir_install/mes/bin/hex2"
install -Dm755 mescc-tools-target/bin/blood-elf "$dir_install/mes/bin/blood-elf"
)
rm -rf "linux-$version_linux"
tar xf "$dir_sources/linux-$version_linux.tar.gz"
( cd "linux-$version_linux"
make mrproper
make ARCH=x86 INSTALL_HDR_PATH="$dir_install/sources/linux-headers" headers_install
find "$dir_install/sources/linux-headers" -type f ! -name "*.h" -exec rm {} +
)
# Build static busybox with musl
rm -rf "busybox-$version_busybox"
tar xf "$dir_sources/busybox-$version_busybox.tar.bz2"
( cd "busybox-$version_busybox"
tar xf "$dir_sources/binutils-${version_binutils}a.tar.bz2"
mv "binutils-$version_binutils" binutils
tar xf "$dir_sources/gcc-$version_gcc.tar.bz2"
mv "gcc-$version_gcc" gcc
tar xf "$dir_sources/gmp-$version_gmp.tar.bz2"
mv "gmp-$version_gmp" gcc/gmp
tar xf "$dir_sources/mpfr-$version_mpfr.tar.bz2"
mv "mpfr-$version_mpfr" gcc/mpfr
tar xf "$dir_sources/mpc-$version_mpc.tar.gz"
mv "mpc-$version_mpc" gcc/mpc
tar xf "$dir_sources/musl-$version_musl.tar.gz"
mv "musl-$version_musl" musl
prefix="$PWD/prefix"
export PATH="$prefix/bin:$PATH"
# Fix requirement for mktemp, so it works with coreutils-5.0
if ! command -v mktemp 2> /dev/null; then
sed -i -e 's@$(mktemp tmp.XXXXXXXXXX)@/tmp/tmp.trylink@' scripts/trylink
fi
# Building a specific version of binutils+GCC, to make the results reproducible...
# GCC-4.6.4's results aren't reproducible across machines for some reason,
# so this bootstrap uses GCC-4.9.4. This increases the build time a little.
( cd binutils
CFLAGS='-O2 -w' ./configure \
--target=i686-bootstrap-linux-gnu \
--prefix="$prefix" \
--with-sysroot="$prefix" \
--disable-nls \
--disable-werror
make
make install
)
( cd gcc
mkdir build && cd build # Build breaks without a build directory
# Using --with-local-prefix=/ puts /include in the search path before
# /lib/gcc/.../include-fixed, avoiding some issues.
CFLAGS='-O2 -w' CXXFLAGS='-O2 -w' MAKEINFO=true ../configure \
--target=i686-bootstrap-linux-gnu \
--prefix="$prefix" \
--with-sysroot="$prefix" \
--with-local-prefix=/ \
--with-host-libstdcxx=-lsupc++ \
--with-newlib \
--without-headers \
--disable-shared \
--disable-threads \
--disable-nls \
--enable-languages=c
make all-gcc all-target-libgcc
make install-gcc install-target-libgcc
)
# Musl provides a very small libc, that can be linked statically.
# It might be worthwhile to switch to uClibc in the future, as that's
# what's usually used for busybox. Might yield "cleaner" results.
cp -a "$dir_install/sources/linux-headers" prefix
( cd musl
./configure \
--host=i686-bootstrap-linux-gnu \
--prefix="$PWD/../prefix" \
--disable-shared
make
make install
)
cp "$dir_root/busybox-config" .config
make CROSS_COMPILE=i686-bootstrap-linux-gnu- CONFIG_STATIC=y busybox
install -Dm755 busybox "$dir_install/bin/busybox"
install -Dm755 busybox_unstripped "$dir_install/bin/busybox_unstripped"
)
cd "$dir_install"
# Verify the built binaries
sha1sum -c "$dir_root/binaries.sha1"
# Pack it up
find bin mes sources \( -type f -o -type l \) ! -path bin/busybox_unstripped | LC_ALL=C sort | xargs tar --mtime=@0 --numeric-owner --owner=0 --group=0 -cf binaries.tar
gzip -nv binaries.tar
# Clean up
cd "$dir_root"
rm -rf build

873
gcc/build_bootstrap.sh
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#!/bin/sh
set -e
# To initialize/enter chroot:
# mkdir dev tmp
# mknod dev/null c 1 3
# mknod dev/tty c 5 0
# ./bin/busybox chroot . /bin/busybox env -i NPROC="$(nproc)" /bin/busybox sh /sources/build_bootstrap.sh
# Amount of make threads, configure this to your liking.
# This can be obtained using `getconf _NPROCESSORS_ONLN`, but requires /proc
# to be mounted, which we avoid.
NPROC="${NPROC:-4}"
# Creates a busybox symlink, useful to keep track of what bootstrap binaries
# are necessary at what stages.
link() {
for x in "$@"; do
if [ ! -e /bin/$x ]; then
busybox ln -s busybox /bin/$x
fi
done
}
link sh
# TODO: Either start using tar-1.14 in the bootstrap or implement the
# -j/--bzip2 option into tar-1.12, to avoid the awkward tar commands.
# TODO: Figure out what causes the timestamps to go bad with tar-1.12 (maybe use 1.13?)
cd /sources
#### Build Mes and its libc from the 4 necessary bootstrap bins
export PATH=/mes/bin:/bin
link cp mkdir rm tar zcat
# nyacc (0.99.3):
rm -rf nyacc-0.99.3
zcat nyacc-0.99.3.tar.gz | tar x
mkdir -p /mes/share/guile/site/2.2
cp -a nyacc-0.99.3/module/nyacc /mes/share/guile/site/2.2
rm -rf nyacc-0.99.3
link basename cat chmod cmp dirname echo ln sed
# mes-boot (0.22):
rm -rf mes-0.22
zcat mes-0.22.tar.gz | tar x
( cd mes-0.22
# "grep: command not found" is harmless here, as the results are identical.
CC=true ./configure.sh --host=x86-linux-mes --prefix=/mes
CC="$PWD/scripts/mescc" ./bootstrap.sh
# Optional, make sure the rebuilt mes still matches.
cmp bin/mes /mes/bin/mes
# Installing manually to avoid reliance on "tar --create"
#BASHOPTS= ./install.sh
set -x
mkdir -p /mes/bin/
cp -a bin/mes scripts/mesar scripts/mescc.scm scripts/mescc scripts/diff.scm /mes/bin/
cp -a include /mes/
mkdir -p /mes/lib/linux/
cp -a lib/x86-mes /mes/lib/
cp -a lib/linux/x86-mes /mes/lib/linux/
cp -a gcc-lib/x86-mes/* /mes/lib/
cp -a mescc-lib/x86-mes /mes/lib/
mkdir -p /mes/share/mes/
cp -a mes/module /mes/share/mes/
mkdir -p /mes/share/guile/site/2.2
cp -a module/* /mes/share/guile/site/2.2
)
rm -rf mes-0.22
link install
# mescc-tools (1.0.1):
# This step is completely optional, as identical tools are already installed.
# However, as a sanity check it's done anyway.
rm -rf mescc-tools-Release_1.0.1
zcat mescc-tools-Release_1.0.1.tar.gz | tar x
( cd mescc-tools-Release_1.0.1
#make -Bn M1 hex2 blood-elf COMMIT= CC=mescc CFLAGS='-lc+tcc'
set -x
mkdir -p bin
mescc -lc+tcc M1-macro.c functions/file_print.c functions/match.c functions/numerate_number.c functions/string.c functions/require.c functions/in_set.c -o bin/M1
mescc -lc+tcc hex2_linker.c functions/file_print.c functions/match.c functions/numerate_number.c functions/require.c functions/in_set.c -o bin/hex2
mescc -lc+tcc blood-elf.c functions/file_print.c functions/match.c functions/require.c functions/in_set.c functions/numerate_number.c -o bin/blood-elf
# Optional, make sure the tools built with the new mes still match.
cmp bin/M1 /mes/bin/M1
cmp bin/hex2 /mes/bin/hex2
cmp bin/blood-elf /mes/bin/blood-elf
install -Dm755 bin/M1 /mes/bin/M1
install -Dm755 bin/hex2 /mes/bin/hex2
install -Dm755 bin/blood-elf /mes/bin/blood-elf
)
rm -rf mescc-tools-Release_1.0.1
#### Bootstrap TCC, with mes-libc
# Using the C library provided by Mes, we build the Tiny C Compiler to use it,
# to later be able to build a bunch of tools from this combination.
export PATH=/tcc/bin:/mes/bin:/bin
rm -rf /tcc
# tcc-boot0 (0.9.26):
# This step will take a _long_ time, because mescc is a slow compiler, as a
# result of how minimal its core is designed.
# Thankfully, things will speed up considerably once TCC is bootstrapped.
rm -rf tcc-0.9.26-1103-g6e62e0e
zcat tcc-0.9.26-1103-g6e62e0e.tar.gz | tar x
( cd tcc-0.9.26-1103-g6e62e0e
echo '#define TCC_VERSION "0.9.27"' > config.h
MES_PREFIX=/mes prefix=/tcc ./bootstrap.sh # Slow!
# Installing manually to avoid reliance on "tar --create"
#MES_PREFIX=/mes prefix=/tcc ./install.sh
mkdir -p /tcc/bin/
cp tcc /tcc/bin/
cp -a /mes/include /tcc/
mkdir -p /tcc/lib/tcc/
cp -a crt1.o crti.o crtn.o libc.a libgetopt.a /tcc/lib/
cp -a libtcc1.a /tcc/lib/tcc/
)
rm -rf tcc-0.9.26-1103-g6e62e0e
# This binary was only necessary for the optional checks in mes-boot,
# mescc-tools, as well as tcc-boot0's bootstrap.sh
# Possible future removal/implementation in mes?
rm /bin/cmp
#### Build compression tools, upgrade TCC to 0.9.27.
# Upgrading TCC is probably not truly necessary, but it hardly hurts.
# Some tools are required to achieve this, but these tools will be necessary
# later on, regardless.
export PATH=/tcc/bin:/bin
# sed-mesboot (1.18):
# Used by nearly every configure script, and in this script to patch sources.
# It's only used for the mes-boot configure.sh before this point.
# May be possible to move out of the bootstrap bins in the future.
rm -rf sed-1.18
zcat sed-1.18.tar.gz | tar x
( cd sed-1.18
set -x
tcc -DREGEX_MALLOC=1 -DSTDC_HEADERS=1 -DHAVE_MEMCPY=1 -o sed sed.c utils.c regex.c getopt.c getopt1.c
install -Dm755 sed /bin/sed
)
rm -rf sed-1.18
link mv
# gzip-mesboot (1.2.4):
# Reduces the reliance on the bootstrap binary for gzip, as that only has to be
# used to decompress archives. Glibc requires it to compress.
# This, along with `tar` should be rebuilt as soon as possible due to how many
# packages rely on these, but `tar` unfortunately has a few more dependencies.
rm -rf gzip-1.2.4
zcat gzip-1.2.4.tar.gz | tar x
( cd gzip-1.2.4
sed -e 's/^char [*]strlwr/&_/' util.c > /tmp/sed; mv /tmp/sed util.c
set -x
tcc -DNO_UTIME_H -DHAVE_UNISTD_H -o gzip gzip.c zip.c deflate.c trees.c bits.c unzip.c inflate.c util.c crypt.c lzw.c unlzw.c unpack.c unlzh.c getopt.c
install -Dm755 gzip /bin/gzip
ln -sf gzip /bin/gunzip
ln -sf gzip /bin/zcat
)
rm -rf gzip-1.2.4
# bzip2-mesboot (1.0.8):
# This compressor isn't part of the bootstrap binaries, but is necessary for
# unpacking certain archives, including tcc-0.9.27.tar.bz2...
rm -rf bzip2-1.0.8
zcat bzip2-1.0.8.tar.gz | tar x
( cd bzip2-1.0.8
# mes-libc-0.22 uses the value 0 for stdin, which trips up a check.
# This breaks decompressing data from stdin, through for example "tar jxf".
# Patching it out is "fine", since enough checks cover other failure states.
sed -e 's/if (f == NULL /if (0 /' bzlib.c > /tmp/sed; mv /tmp/sed bzlib.c
echo '#define fchown(filedes, owner, group) 0' > utime.h
echo '#define fchmod(filedes, mode) 0' >> utime.h
echo 'struct utimbuf { int actime; int modtime; };' >> utime.h
echo '#define utime(filename, buf) 0' >> utime.h
set -x
tcc -I. -o bzip2 blocksort.c huffman.c crctable.c randtable.c compress.c decompress.c bzlib.c bzip2.c
install -Dm755 bzip2 /bin/bzip2
ln -sf bzip2 /bin/bunzip2
ln -sf bzip2 /bin/bzcat
)
rm -rf bzip2-1.0.8
# tcc-boot (0.9.27):
rm -rf tcc-0.9.27
bzcat tcc-0.9.27.tar.bz2 | tar x
( cd tcc-0.9.27
sed -e 's/s->alacarte_link = 1;/s->static_link = 1;/' \
libtcc.c > /tmp/sed; mv /tmp/sed libtcc.c
echo '#define TCC_VERSION "0.9.27"' > config.h
# Build tcc twice, as avoiding bootstrapping here breaks programs later
set -x
for x in a b; do
tcc -vvv -DONE_SOURCE=1 \
-DTCC_TARGET_I386 \
-DCONFIG_TCC_STATIC \
-DCONFIG_TCCDIR=\"/tcc/lib/tcc\" \
-DCONFIG_TCC_CRTPREFIX=\"/tcc/lib\" \
-DCONFIG_TCC_SYSINCLUDEPATHS=\"/tcc/include\" \
-DCONFIG_TCC_LIBPATHS=\"/tcc/lib\" \
-o tcc tcc.c
./tcc -vvv -c -o libtcc1.o lib/libtcc1.c
./tcc -ar rc libtcc1.a libtcc1.o
install -Dm755 tcc /tcc/bin/tcc
install -Dm644 libtcc1.a /tcc/lib/tcc/libtcc1.a
done
)
rm -rf tcc-0.9.27
#### Build tools, round 1
# At this point we try to rebuild the bootstrap tools, to reduce the reliance
# on them and their (minimal) featureset, and build some additional tools
# required to build GCC2.
# Rebuilding the bootstrap tools as early as possible allows for simplification
# of the bootstrap tools, which should lead to smaller binaries.
# Unfortunately, the following packages can not be built with TCC yet:
# - coreutils
# These are required to build GCC2, and the bootstrap binaries will be used.
# grep-mesboot (2.0):
# Required by most configure scripts, but we've been able to avoid it thus far.
rm -rf grep-2.0
zcat grep-2.0.tar.gz | tar x
( cd grep-2.0
set -x
tcc -DSTDC_HEADERS=1 -DHAVE_ALLOCA_H=1 -DHAVE_MEMCHR=1 -o grep grep.c getopt.c regex.c dfa.c kwset.c obstack.c search.c
install -Dm755 grep /bin/grep
ln -sf grep /bin/egrep
ln -sf grep /bin/fgrep
)
rm -rf grep-2.0
link expr ls uniq sleep sort
# gnu-make-mesboot0 (3.80):
# Make is required to build nearly everything, so it has to be built as soon as
# possible.
rm -rf make-3.80
bzcat make-3.80.tar.bz2 | tar x
( cd make-3.80
sed -e 's/@REMOTE@/stub/' \
-e 's/@LIBOBJS@/getloadavg.o/' \
build.sh.in > /tmp/sed; mv /tmp/sed build.sh.in
sed -e 's/^extern long int lseek.*/\/\/ &/' \
make.h > /tmp/sed; mv /tmp/sed make.h
CC=tcc LD=tcc ./configure \
--build=i686-pc-linux-gnu \
--disable-nls
sh build.sh
install -Dm755 make /bin/make
)
rm -rf make-3.80
# Multi-threaded make is broken at this stage
export MAKEFLAGS=-j1
link tr
# bash-mesboot0 (2.05b):
# A lot of shell scripts are ran during the build process.
# Bootstrapping it here allows the initial shell to remain simple.
# This shell is non-interactive, so the bootstrap shell might be used by the
# user, instead, while this one just runs most scripts.
rm -rf bash-2.05b
zcat bash-2.05b.tar.gz | tar x
( cd bash-2.05b
sed -e 's/mksyntax\.c$/& -lgetopt/' \
-e 's/buildversion\.o$/& -lgetopt/' \
Makefile.in > /tmp/sed; mv /tmp/sed Makefile.in
sed -e 's/int name, namelen;/char *name; int namelen;/' \
lib/sh/oslib.c > /tmp/sed; mv /tmp/sed lib/sh/oslib.c
sed -e 's/defined (HAVE_LOCALE_H)/0/' \
lib/sh/snprintf.c > /tmp/sed; mv /tmp/sed lib/sh/snprintf.c
# Progcomp is disabled, so this file shouldn't be built...
# TODO: --disable-progcomp should take care of this, figure out what's
# up with that.
sed -e 's/ complete\.o$//' \
builtins/Makefile.in > /tmp/sed; mv /tmp/sed builtins/Makefile.in
# Delete unnecessary commands at end of build
sed -e '/ls -l $(Program)$/d' \
-e '/size $(Program)$/d' \
Makefile.in > /tmp/sed; mv /tmp/sed Makefile.in
CC='tcc -D_POSIX_VERSION=1' AR='tcc -ar' ./configure \
--build=i686-pc-linux-gnu \
--without-bash-malloc \
--disable-readline \
--disable-history \
--disable-bang-history \
--disable-progcomp \
--disable-nls \
bash_cv_getcwd_calls_popen=no \
bash_cv_signal_vintage=posix \
ac_cv_func_working_mktime=yes
echo '#define endpwent(x) 0' >> config.h
make bash
install -Dm755 bash /bin/bash
ln -sf bash /bin/sh
)
rm -rf bash-2.05b
# diffutils-mesboot (2.7):
# `cmp` is only absolutely required by tcc-boot0 thus far (though it should be
# possible to patch out), and not strictly required until gcc-4.6.4's install
# procedure.
# However, a lot of configure scripts do use it, and `diff` from time to time,
# so it's a good thing to have as soon as possible, regardless.
rm -rf diffutils-2.7
zcat diffutils-2.7.tar.gz | tar x
( cd diffutils-2.7
CC=tcc ./configure
make cmp diff
install -Dm755 cmp /bin/cmp
install -Dm755 diff /bin/diff
)
rm -rf diffutils-2.7
# tar-mesboot0 (1.12), not in guix:
# Self explanatory, required to unpack archives. Might be possible to moved
# earlier in the chain by avoiding the configure script/makefile.
# Softens the dependency on tar, since up until now it was only necessary to
# unpack archives, while the install procedure of e.g. gcc, requires it to
# also create archives.
rm -rf tar-1.12
zcat tar-1.12.tar.gz | tar x
( cd tar-1.12
# Remove need for ls -L
sed -e 's/ls -Lt /ls -t /' configure > /tmp/sed; mv /tmp/sed configure
chmod +x configure
CC=tcc ./configure --disable-nls
make -C lib AR='tcc -ar'
make -C src
install -Dm755 src/tar /bin/tar
)
rm -rf tar-1.12
# gawk-mesboot0 (3.0.0):
# AWK is required to build glibc.
rm -rf gawk-3.0.0
zcat gawk-3.0.0.tar.gz | tar x
( cd gawk-3.0.0
sed -e 's/date /echo today /' \
configure > /tmp/sed; mv /tmp/sed configure
sed -e 's/date /echo today /' \
-e 's/ autoheader/ true/' \
-e 's/ -lm//' \
Makefile.in > /tmp/sed; mv /tmp/sed Makefile.in
chmod +x configure
ac_cv_func_getpgrp_void=yes ac_cv_func_tzset=yes \
CC=tcc LD=tcc ./configure \
--build=i686-pc-linux-gnu \
--disable-nls
make gawk
install -Dm755 gawk /bin/gawk
ln -sf gawk /bin/awk
)
rm -rf gawk-3.0.0
# patch-mesboot (2.5.9):
# Used to patch certain packages to fix bootstrap-specific build failures.
rm -rf patch-2.5.9
zcat patch-2.5.9.tar.gz | tar x
( cd patch-2.5.9
CC=tcc ./configure
make patch
install -Dm755 patch /bin/patch
)
rm -rf patch-2.5.9
#coreutils? (fileutils, textutils, sh-utils)?
#### Bootstrap gcc2 toolchain, consisting of gcc-2.95.2, binutils-2.14, glibc-2.2.5
# Also rebuild it against itself to remove tcc and mes-libc from the picture.
# This will become the GNU toolchain that's the basis for the remaining set of tools.
export PATH=/gcc2/bin:/tcc/bin:/bin
rm -rf /gcc2
link touch true
# binutils-mesboot0 (2.14):
rm -rf binutils-2.14
bzcat binutils-2.14.tar.bz2 | tar x
( cd binutils-2.14
# Fix some sed-related issues...
sed -e 's/_frag=${srcdir}\//_frag=/' \
configure > /tmp/sed; mv /tmp/sed configure
sed -e "s@^sed -e '/SRC-POTFILES.*\$@echo -e 'all:\\\\n\\\\ttrue\\\\n\\\\ninstall:\\\\n\\\\ttrue\\\\n' > po/Makefile@" \
bfd/configure > /tmp/sed; mv /tmp/sed bfd/configure
chmod +x configure bfd/configure
CC='tcc -D__GLIBC_MINOR__=6' AR='tcc -ar' ./configure \
--host=i686-pc-linux-gnu \
--prefix=/gcc2 \
--with-sysroot \
--with-lib-path=/gcc2/lib \
--disable-shared \
--disable-nls
make
make install
)
rm -rf binutils-2.14
# gcc-core-mesboot0 (2.95.3):
rm -rf gcc-2.95.3
zcat gcc-core-2.95.3.tar.gz | tar x
( cd gcc-2.95.3
patch -p1 -i ../gcc-boot-2.95.3.patch
CC='tcc -D__GLIBC_MINOR__=6' ./configure \
--host=i686-pc-linux-gnu \
--prefix=/gcc2 \
--disable-shared
rm -rf texinfo && touch gcc/cpp.info gcc/gcc.info
make LIBGCC2_INCLUDES=-I/tcc/include
make install
set -x
mkdir tmp
cd tmp
ar x ../gcc/libgcc2.a
ar x /tcc/lib/tcc/libtcc1.a
ar r /gcc2/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/libgcc.a *.o
cp ../gcc/libgcc2.a /gcc2/lib/libgcc2.a
)
rm -rf gcc-2.95.3
export PATH=/gcc2/bin:/bin
link pwd
# glibc-mesboot0 (2.2.5):
cp -ar linux-headers/include /gcc2/
rm -rf glibc-2.2.5
zcat glibc-2.2.5.tar.gz | tar x
( cd glibc-2.2.5
patch -p1 -i ../glibc-boot-2.2.5.patch
CC='gcc -DMES_BOOTSTRAP=1 -DBOOTSTRAP_GLIBC=1'" -L $PWD" ./configure \
--host=i686-pc-linux-gnu \
--prefix=/gcc2 \
--with-headers=/gcc2/include \
--disable-shared \
--disable-sanity-checks \
--enable-static-nss \
--without-__thread \
--without-cvs \
--without-gd \
--without-tls
make
make install
)
rm -rf glibc-2.2.5
# gcc-mesboot0 (2.95.3):
rm -rf gcc-2.95.3
zcat gcc-core-2.95.3.tar.gz | tar x
( cd gcc-2.95.3
patch -p1 -i ../gcc-boot-2.95.3.patch
./configure \
--host=i686-pc-linux-gnu \
--prefix=/gcc2 \
--disable-shared
rm -r texinfo && touch gcc/cpp.info gcc/gcc.info
make LIBGCC2_INCLUDES=-I/gcc2/include
make install
set -x
mkdir tmp
cd tmp
ar x ../gcc/libgcc2.a
ar r /gcc2/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/libgcc.a *.o
cp ../gcc/libgcc2.a /gcc2/lib/libgcc2.a
)
rm -rf gcc-2.95.3
# binutils-mesboot1 (2.14):
rm -rf binutils-2.14
bzcat binutils-2.14.tar.bz2 | tar x
( cd binutils-2.14
# Fix some sed-related issues...
sed -e 's/_frag=${srcdir}\//_frag=/' \
configure > /tmp/sed; mv /tmp/sed configure
sed -e "s@^sed -e '/SRC-POTFILES.*\$@echo -e 'all:\\\\n\\\\ttrue\\\\n\\\\ninstall:\\\\n\\\\ttrue\\\\n' > po/Makefile@" \
bfd/configure > /tmp/sed; mv /tmp/sed bfd/configure
chmod +x configure bfd/configure
./configure \
--host=i686-pc-linux-gnu \
--prefix=/gcc2 \
--with-sysroot \
--with-lib-path=/gcc2/lib \
--disable-shared \
--disable-nls
make
make install
)
rm -rf binutils-2.14
#### Build tools, round 2, now with less TCC
# At this stage we upgrade some tools that need an upgrade to build later parts,
# as well as build some new tools we need.
# The remaining bootstrap binaries are rebuilt here, too.
# gnu-make-mesboot (3.82):
# This version can use multiple threads, greatly speeding up further builds.
# TODO: Can this be upgraded to 4.0 to support building modern glibc-2.31?
# Make 4.2/4.3 works flawlessly
rm -rf make-3.82
bzcat make-3.82.tar.bz2 | tar x
( cd make-3.82
LIBS='-lc -lnss_files -lnss_dns -lresolv' ./configure \
--build=i686-pc-linux-gnu
make make
install -Dm755 make /bin/make
)
rm -rf make-3.82
# From this point, multi-threaded make can be used.
export MAKEFLAGS="-j$NPROC"
# coreutils-mesboot0 (5.0):
# This is the oldest available version of coreutils, and it can't be built any
# sooner...
rm -rf coreutils-5.0
bzcat coreutils-5.0.tar.bz2 | tar x
( cd coreutils-5.0
# Tar-1.12 doesn't set the timestamps correctly...
# Not fixing them causes erratic build results.
touch aclocal.m4
touch Makefile.in
touch lib/Makefile.in
touch lib/getdate.c
touch src/Makefile.in
touch src/dircolors.h
touch src/wheel.h
touch config.hin
touch configure
LIBS='-lc -lnss_files -lnss_dns -lresolv' ./configure \
--build=i686-pc-linux-gnu \
--prefix=/ \
--disable-nls
make -C lib
make -C src
make DESTDIR="$PWD/install" -C src install-exec
install -v -Dm755 install/bin/* /bin/
)
rm -rf coreutils-5.0
# bash-mesboot (4.4):
# Finally an interactive shell!
rm -rf bash-4.4
zcat bash-4.4.tar.gz | tar x
( cd bash-4.4
sed -e 's/;;$/;/' shell.c > /tmp/sed; mv /tmp/sed shell.c
LIBS='-lc -lnss_files -lnss_dns -lresolv' ./configure \
--disable-nls
make bash
install -Dm755 bash /bin/bash
ln -sf bash /bin/sh
)
rm -rf bash-4.4
# (optional) At this point we can get rid of the remaining bootstrap binary...
#rm /bin/busybox /bin/busybox_unstripped
# Continue with bash (has tab completion :D):
# exec /bin/sh -l
# Entering the chroot after this point:
# ./bin/chroot . /bin/env -i PATH=/gcc2/bin:/bin /bin/sh -l
# tar-mesboot (1.22):
# Anything before tar 1.14 truncates the filenames when unpacking gcc-4.6.4
# and gcc-4.9.4 for some odd reason.
# Tar-1.12 is also known to mess with the timestamps of several packages such
# as coreutils and gawk.
# This may be removed if 1.14 can be built with TCC.
rm -rf tar-1.22
bzcat tar-1.22.tar.bz2 | tar x
( cd tar-1.22
LIBS='-lc -lnss_files -lnss_dns -lresolv' ./configure \
--disable-nls
make -C lib
make -C src
install -Dm755 src/tar /bin/tar
)
rm -rf tar-1.22
# sed-mesboot (4.0.6):
# Required to build binutils-2.20.1a
# TODO: Can this be upgraded to 4.3 to support the -E option?
rm -rf sed-4.0.6
tar zxf sed-4.0.6.tar.gz
( cd sed-4.0.6
./configure --disable-nls
make -C lib
make -C sed
install -Dm755 sed/sed /bin/sed
)
rm -rf sed-4.0.6
# gawk-mesboot (3.1.8):
# Upgrade required to build glibc-2.16.0
rm -rf gawk-3.1.8
tar jxf gawk-3.1.8.tar.bz2
( cd gawk-3.1.8
./configure \
--build=i686-pc-linux-gnu \
ac_cv_func_connect=no
make gawk
install -Dm755 gawk /bin/gawk
ln -sf gawk /bin/awk
)
rm -rf gawk-3.1.8
#### Bootstrap C++, using gcc-4.6.4
export PATH=/gcc46/bin:/gcc2/bin:/bin
rm -rf /gcc46
# TODO: Reduce the amount of configure flags by only building specific targets
# gcc-mesboot1 (4.6.4):
rm -rf gcc-4.6.4
tar jxf gcc-core-4.6.4.tar.bz2
tar jxf gcc-g++-4.6.4.tar.bz2
( cd gcc-4.6.4
tar jxf ../gmp-4.3.2.tar.bz2
mv gmp-4.3.2 gmp
tar jxf ../mpfr-2.4.2.tar.bz2
mv mpfr-2.4.2 mpfr
tar zxf ../mpc-1.0.3.tar.gz
mv mpc-1.0.3 mpc
# Build a compiler with /gcc2 as its sysroot, so it picks up the libraries
# from there without having to manually set environment variables, or
# patch the sources.
# This just barely works because we're statically linking at this stage.
sed -i -e '/^NATIVE_SYSTEM_HEADER_DIR =/s@/usr/include@/include@' \
gcc/Makefile.in
# Using --enable-bootstrap to avoid segfaulting later...
# This causes the build to be the longest in the bootstrap, oh well.
./configure \
--build=i686-pc-linux-gnu \
--prefix=/gcc46 \
--with-sysroot=/gcc2 \
--with-local-prefix=/ \
--with-stage1-libs=-lm \
--disable-shared \
\
--disable-nls \
--disable-decimal-float \
--disable-libatomic \
--disable-libcilkrts \
--disable-libgomp \
--disable-libitm \
--disable-libmudflap \
--disable-libquadmath \
--disable-libsanitizer \
--disable-libssp \
--disable-libvtv \
--disable-lto \
--disable-lto-plugin \
--disable-multilib \
--disable-plugin \
--disable-threads \
--enable-threads=single \
--disable-libstdcxx-pch \
--disable-build-with-cxx
make
make install
)
rm -rf gcc-4.6.4
#### Create "final" bootstrap toolchain, gcc-4.9.4, binutils-2.20.1a, glibc-2.16.0
# This toolchain is the minimum requirement to build a current GCC, as it
# fully supports C11 and C++11.
# Additionally, this toolchain is built with support for dynamic linking.
export PATH=/bootstrap/bin:/gcc46/bin:/gcc2/bin:/bin
rm -rf /bootstrap
# binutils-mesboot (2.20.1a):
rm -rf binutils-2.20.1
tar jxf binutils-2.20.1a.tar.bz2
( cd binutils-2.20.1
./configure \
--build=i686-pc-linux-gnu \
--prefix=/bootstrap \
--with-sysroot \
--with-lib-path=/bootstrap/lib \
--disable-shared \
--disable-nls \
--disable-werror
make
make install
)
rm -rf binutils-2.20.1
export PATH=/bootstrap/bin:/gcc46/bin:/bin
# glibc-mesboot (2.16.0):
cp -ar linux-headers/include /bootstrap/
rm -rf glibc-2.16.0
tar jxf glibc-2.16.0.tar.bz2
( cd glibc-2.16.0
patch -p1 -i ../glibc-boot-2.16.0.patch
# This can't be rebuilt with the final gcc and glibc, for some reason
# Possibly the configure flags aren't suitable?
mkdir build && cd build
CC='/gcc46/bin/gcc -DBOOTSTRAP_GLIBC=1 -L/gcc2/lib' ../configure \
--build=i686-pc-linux-gnu \
--prefix=/bootstrap \
--with-headers=/bootstrap/include \
--disable-multi-arch \
--enable-static-nss \
--with-pthread \
--without-cvs \
--without-gd \
--enable-add-ons=nptl \
libc_cv_predef_stack_protector=no \
libc_cv_ssp=no \
libc_cv_friendly_stddef=yes
make "$PWD/sysd-sorted"
sed -i -e 's/ sunrpc//' -e 's/ nis//' sysd-sorted
make
# `sbindir` isn't picked up by config.make.in, so the configure flag is useless
mkdir -p /bootstrap/etc
make install
)
rm -rf glibc-2.16.0
# gcc-mesboot (4.9.4):
rm -rf gcc-4.9.4
tar jxf gcc-4.9.4.tar.bz2
( cd gcc-4.9.4
tar jxf ../gmp-4.3.2.tar.bz2
mv gmp-4.3.2 gmp
tar jxf ../mpfr-2.4.2.tar.bz2
mv mpfr-2.4.2 mpfr
tar zxf ../mpc-1.0.3.tar.gz
mv mpc-1.0.3 mpc
# The previous setup to set the library/include path with --with-sysroot
# doesn't work when you throw dynamic linking into the mix and you're not
# purely cross-compiling (we want to run resulting binaries as-is).
# So, instead, we patch the sources.
# Thankfully, --with-native-system-header-dir was introduced, so we don't
# need to patch STANDARD_INCLUDE_DIR to do this.
cat >> gcc/config/i386/linux.h << 'EOF'
#undef GLIBC_DYNAMIC_LINKER
#define GLIBC_DYNAMIC_LINKER "/bootstrap/lib/ld-linux.so.2"
#define STANDARD_STARTFILE_PREFIX_1 "/bootstrap/lib/"
#define STANDARD_STARTFILE_PREFIX_2 ""
EOF
./configure \
--build=i686-pc-linux-gnu \
--prefix=/bootstrap \
--with-native-system-header-dir=/bootstrap/include \
--with-local-prefix=/bootstrap \
--with-host-libstdcxx=-lsupc++ \
--enable-languages=c,c++ \
--disable-bootstrap \
\
--disable-nls \
--disable-decimal-float \
--disable-libatomic \
--disable-libcilkrts \
--disable-libgomp \
--disable-libitm \
--disable-libmudflap \
--disable-libquadmath \
--disable-libsanitizer \
--disable-libssp \
--disable-libvtv \
--disable-lto \
--disable-lto-plugin \
--disable-multilib \
--disable-plugin \
--disable-threads \
--enable-threads=single \
--disable-libstdcxx-pch \
--disable-build-with-cxx
make
make install
)
rm -rf gcc-4.9.4
#### The end
# With the bootstrap toolchain fully built, apply some finishing touches by
# cleaning stuff up.
export PATH=/bootstrap/bin:/bin
# findutils (4.6.0):
# This one is completely optional, as it's not required for a bootstrap.
# However, a ton of scripts you'll probably use to further bootstrap will
# probably need it.
# Busybox/linux requiring this to build is a good enough reason to put it here.
rm -rf findutils-4.6.0
tar zxf findutils-4.6.0.tar.gz
( cd findutils-4.6.0
./configure \
--build=i686-pc-linux-gnu \
--disable-nls
make -C gl
make -C lib
make -C find
make -C xargs
install -Dm755 find/find /bin/find
install -Dm755 xargs/xargs /bin/xargs
)
rm -rf findutils-4.6.0
# Entering chroot before cleanup:
# ./bin/chroot . /bin/env -i PATH=/bootstrap/bin:/bin /bin/sh -l
# Move binaries
rm -f /bin/busybox /bin/busybox_unstripped
mv /bin/* /bootstrap/bin/
hash -r # a ton of binaries just moved
ln -sf ../bootstrap/bin/bash /bin/bash
ln -sf bash /bin/sh
# Strip everything (saves hundreds of MB)
find /bootstrap/lib -type f -name '*.a' | xargs strip --strip-debug || true
find /bootstrap/lib -type f -name '*.so*' | xargs strip --strip-unneeded || true
find /bootstrap/bin /bootstrap/sbin /bootstrap/libexec -type f | xargs strip --strip-all || true
cp /bootstrap/bin/strip /strip
strip -s /strip
mv /strip /bootstrap/bin/strip
# Clean up
#rm -rf /gcc46 /gcc2 /tcc /mes
rm -rf /bootstrap/share /bootstrap/var /bootstrap/etc
rm -f /bootstrap/lib/*.la /bootstrap/lib/libstdc++.so.*-gdb.py
# Back it up
cd /
find bootstrap bin/sh bin/bash -type f -o -type l | LC_ALL=C sort | xargs tar --mtime=@0 --numeric-owner --owner=0 --group=0 -cf bootstrap.tar
gzip -nv bootstrap.tar
# Entering chroot after cleanup:
# ./bootstrap/bin/chroot . /bootstrap/bin/env -i PATH=/bootstrap/bin /bootstrap/bin/sh -l

431
gcc/build_cross.sh
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@ -0,0 +1,431 @@
#!/bin/sh
set -e
# Example cross compile for x86_64, multilib-enabled
# This can be adapted for different architectures, but do note that some
# architectures will need more recent versions of gcc/glibc/tools.
# The version of gcc in /bootstrap should be able to build any such newer
# versions, at least as of right now (GCC 10.2).
# To homogenize build instructions across both multilib and non-multilib
# installs, and because some applications require heavy patches to install
# in alternate libdirs (cough cough python), the lib directory will contain
# native libraries, while lib32 whill contain 32-bit libraries.
# GCC will be patched slightly, and configured to achieve this, as by default
# it uses lib64 and lib.
# To initialize/enter chroot:
# mkdir dev tmp
# mknod dev/null c 1 3
# ./bootstrap/bin/chroot . /bootstrap/bin/env -i NPROC="$(nproc)" /bootstrap/bin/sh /sources/build_cross.sh
# Amount of make threads, configure this to your liking.
# This can be obtained using `getconf _NPROCESSORS_ONLN`, but requires /proc
# to be mounted, which we avoid.
export MAKEFLAGS="-j${NPROC:-4}"
cd /sources
#### Make a cross-compiler
export PATH=/cross/bin:/bootstrap/bin
rm -rf /cross /system
# kernel headers
rm -rf linux-4.14
tar zxf linux-4.14.tar.gz
( cd linux-4.14
make mrproper
make ARCH=x86_64 INSTALL_HDR_PATH="$PWD/install" headers_install
find install -type f ! -name "*.h" -exec rm {} +
mkdir -p /system/bootstrap/
cp -a install/include /system/bootstrap/
)
rm -rf linux-4.14
# Install cross binutils
rm -rf binutils-2.20.1
tar jxf binutils-2.20.1a.tar.bz2
( cd binutils-2.20.1
./configure \
--build=i686-pc-linux-gnu \
--target=x86_64-pc-linux-gnu \
--prefix=/cross \
--with-sysroot=/system \
--disable-shared \
--disable-nls \
--disable-werror
make
make install
)
rm -rf binutils-2.20.1
# Configure the gcc source
rm -rf gcc-4.9.4
tar jxf gcc-4.9.4.tar.bz2
( cd gcc-4.9.4
tar jxf ../gmp-4.3.2.tar.bz2
mv gmp-4.3.2 gmp
tar jxf ../mpfr-2.4.2.tar.bz2
mv mpfr-2.4.2 mpfr
tar zxf ../mpc-1.0.3.tar.gz
mv mpc-1.0.3 mpc
# Set up the location of target glibc
cat >> gcc/config/i386/t-linux64 << 'EOF'
MULTILIB_OSDIRNAMES = m64=../lib
MULTILIB_OSDIRNAMES+= m32=../lib32
EOF
cat >> gcc/config/i386/linux64.h << 'EOF'
#undef GLIBC_DYNAMIC_LINKER32
#undef GLIBC_DYNAMIC_LINKER64
#undef STANDARD_STARTFILE_PREFIX_1
#undef STANDARD_STARTFILE_PREFIX_2
#define GLIBC_DYNAMIC_LINKER32 "/bootstrap/lib32/ld-linux.so.2"
#define GLIBC_DYNAMIC_LINKER64 "/bootstrap/lib/ld-linux-x86-64.so.2"
#define STANDARD_STARTFILE_PREFIX_1 "/bootstrap/lib/"
#define STANDARD_STARTFILE_PREFIX_2 ""
EOF
mkdir build && cd build # Build breaks without a build directory
../configure \
--build=i686-pc-linux-gnu \
--target=x86_64-pc-linux-gnu \
--prefix=/cross \
--with-sysroot=/system \
--with-native-system-header-dir=/bootstrap/include \
--with-local-prefix=/bootstrap \
--with-host-libstdcxx=-lsupc++ \
--enable-multilib \
--enable-languages=c,c++ \
--disable-nls
)
# Install the compiler
make -C gcc-4.9.4/build all-gcc
make -C gcc-4.9.4/build install-gcc
# Configure the glibc source
rm -rf glibc-2.16.0
tar jxf glibc-2.16.0.tar.bz2
( cd glibc-2.16.0
# Fix hardcode of /bin/pwd
sed -i -e 's@/bin/pwd@pwd@g' configure
# Fix building cross-rpcgen without host rpc headers
sed -i -e 's/$(ALL_BUILD_CFLAGS)/-I. &/' sunrpc/Makefile
mkdir build && cd build
../configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--prefix=/bootstrap \
libc_cv_ssp=no \
libc_cv_forced_unwind=yes
cd ..
mkdir build32 && cd build32
../configure \
CC='x86_64-pc-linux-gnu-gcc -m32' \
CXX='x86_64-pc-linux-gnu-g++ -m32' \
--build=i686-bootstrap-linux-gnu \
--host=i686-pc-linux-gnu \
--prefix=/bootstrap \
--libdir=/bootstrap/lib32 \
libc_cv_slibdir=/bootstrap/lib32 \
libc_cv_ssp=no \
libc_cv_forced_unwind=yes
)
# Installing libgcc by using --without-headers --with-newlib in the gcc config
# would avoid having to install csu+headers before building libgcc,
# thereby simplifying the instructions slightly.
# I don't think that simplification is particularly worth it, however.
# Do the whole gcc/glibc song and dance...
# DESTDIR set to a different dir since glibc makefile breaks otherwise...
make -C glibc-2.16.0/build DESTDIR=/system csu/subdir_install
make -C glibc-2.16.0/build32 DESTDIR=/system csu/subdir_install
make -C glibc-2.16.0/build DESTDIR=/system install-bootstrap-headers=yes install-headers
touch /system/bootstrap/include/gnu/stubs.h
x86_64-pc-linux-gnu-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o /system/bootstrap/lib/libc.so
x86_64-pc-linux-gnu-gcc -m32 -nostdlib -nostartfiles -shared -x c /dev/null -o /system/bootstrap/lib32/libc.so
make -C gcc-4.9.4/build all-target-libgcc
make -C gcc-4.9.4/build install-target-libgcc
make -C glibc-2.16.0/build all
make -C glibc-2.16.0/build32 all
make -C glibc-2.16.0/build32 DESTDIR="$PWD/glibc_install" install
make -C glibc-2.16.0/build DESTDIR="$PWD/glibc_install" install
# TODO: Would running force-install instead work?
cp -a glibc_install/bootstrap /system/
rm -rf glibc_install
make -C gcc-4.9.4/build all-target-libstdc++-v3
make -C gcc-4.9.4/build install-target-libstdc++-v3
rm -rf glibc-2.16.0
rm -rf gcc-4.9.4/build
#### Cross-compile the compiler for the target
# Binutils
rm -rf binutils-2.20.1
tar jxf binutils-2.20.1a.tar.bz2
( cd binutils-2.20.1
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--prefix=/bootstrap \
--with-lib-path=/bootstrap/lib \
--with-sysroot \
--disable-shared \
--disable-nls \
--disable-werror
make
make DESTDIR=/system install
)
rm -rf binutils-2.20.1
# GCC (using the unpacked+patched archive from before)
rm -rf gcc-4.9.4/build
( cd gcc-4.9.4
mkdir build && cd build
../configure \
CC_FOR_TARGET=x86_64-pc-linux-gnu-gcc \
CXX_FOR_TARGET=x86_64-pc-linux-gnu-g++ \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--prefix=/bootstrap \
--with-native-system-header-dir=/bootstrap/include \
--with-local-prefix=/bootstrap \
--enable-multilib \
--enable-languages=c,c++ \
--disable-nls
make all-gcc all-target-libgcc all-target-libstdc++-v3
make DESTDIR=/system install-gcc install-target-libgcc install-target-libstdc++-v3
)
rm -rf gcc-4.9.4
#### Install a bunch of tools for the target
rm -rf coreutils-5.0
tar jxf coreutils-5.0.tar.bz2
( cd coreutils-5.0
# Fix conflicting type errors
sed -i -e '/^char \*malloc/d' lib/putenv.c
sed -i -e 's/tee /tee_files /g' src/tee.c
sed -i -e 's/eaccess/_&/g' src/test.c
./configure \
--prefix=/bootstrap \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls \
ac_cv_func_malloc_0_nonnull=yes \
am_cv_func_working_getline=yes \
utils_cv_sys_open_max=1019
make -C lib
make -C src
make -C src DESTDIR=/system install-exec
# Link chroot statically (optional if you can use the host's chroot)
x86_64-pc-linux-gnu-gcc -static -O2 -o /system/bootstrap/bin/chroot src/chroot.o lib/libfetish.a
)
rm -rf coreutils-5.0
rm -rf bash-4.4
tar zxf bash-4.4.tar.gz
( cd bash-4.4
# The configure script can't run a lot of tests when cross-compiling,
# so a lot of the tests are specified manually to match a native build.
# This fixes some otherwise-broken scripts when building Gentoo for example.
# It uses the following test: [[ $(< <(echo foo) ) == foo ]]
# to check for a sane bash.
# Xz also has issues building with a cross-compiled bash.
# I encourage you to compare the config.h with a native build!
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls \
ac_cv_func_chown_works=yes \
ac_cv_func_mmap_fixed_mapped=yes \
ac_cv_func_strcoll_works=yes \
bash_cv_func_sigsetjmp=present \
bash_cv_getcwd_malloc=yes \
bash_cv_job_control_missing=no \
bash_cv_printf_a_format=yes \
bash_cv_sys_named_pipes=yes \
bash_cv_sys_siglist=yes \
bash_cv_ulimit_maxfds=yes \
bash_cv_under_sys_siglist=yes \
bash_cv_unusable_rtsigs=no \
bash_cv_wcwidth_broken=yes \
bash_cv_wexitstatus_offset=8
make bash
install -Dm755 bash /system/bootstrap/bin/bash
ln -sf bash /system/bootstrap/bin/sh
)
rm -rf bash-4.4
rm -rf gzip-1.2.4
tar zxf gzip-1.2.4.tar.gz
( cd gzip-1.2.4
# -DSTDC_HEADERS=1 -DHAVE_UNISTD_H=1 -DDIRENT=1
# Such an old configure script doesn't support cross-compiling...
set -x
x86_64-pc-linux-gnu-gcc -DSTDC_HEADERS=1 -w -O2 -o gzip gzip.c zip.c deflate.c trees.c bits.c unzip.c inflate.c util.c crypt.c lzw.c unlzw.c unpack.c unlzh.c getopt.c
CC=x86_64-pc-linux-gnu-gcc ./configure
make gzip
install -Dm755 gzip /system/bootstrap/bin/gzip
ln -sf gzip /system/bootstrap/bin/gunzip
ln -sf gzip /system/bootstrap/bin/zcat
)
rm -rf gzip-1.2.4
rm -rf bzip2-1.0.8
tar zxf bzip2-1.0.8.tar.gz
( cd bzip2-1.0.8
make \
CC=x86_64-pc-linux-gnu-gcc \
AR=x86_64-pc-linux-gnu-ar \
bzip2
install -Dm755 bzip2 /system/bootstrap/bin/bzip2
ln -sf bzip2 /system/bootstrap/bin/bunzip2
ln -sf bzip2 /system/bootstrap/bin/bzcat
)
rm -rf bzip2-1.0.8
rm -rf tar-1.22
tar jxf tar-1.22.tar.bz2
( cd tar-1.22
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls
make -C lib
make -C src
install -Dm755 src/tar /system/bootstrap/bin/tar
)
rm -rf tar-1.22
rm -rf grep-2.0
tar zxf grep-2.0.tar.gz
( cd grep-2.0
# -DGREP -DSTDC_HEADERS=1 -DHAVE_STRING_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_UNISTD_H=1 -DHAVE_ALLOCA_H=1 -DHAVE_GETPAGESIZE=1 -DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -DHAVE_VALLOC=1 -DHAVE_WORKING_MMAP=1
# Such an old configure script doesn't support cross-compiling...
set -x
x86_64-pc-linux-gnu-gcc -DSTDC_HEADERS=1 -DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -w -O2 -o grep grep.c getopt.c regex.c dfa.c kwset.c obstack.c search.c
install -Dm755 grep /system/bootstrap/bin/grep
ln -sf grep /system/bootstrap/bin/egrep
ln -sf grep /system/bootstrap/bin/fgrep
)
rm -rf grep-2.0
# Optional, rationale for inclusion same as in build_bootstrap.sh
rm -rf findutils-4.6.0
tar zxf findutils-4.6.0.tar.gz
( cd findutils-4.6.0
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls
make -C gl
make -C lib
make -C find
make -C xargs
install -Dm755 find/find /system/bootstrap/bin/find
install -Dm755 xargs/xargs /system/bootstrap/bin/xargs
)
rm -rf findutils-4.6.0
rm -rf diffutils-2.7
tar zxf diffutils-2.7.tar.gz
( cd diffutils-2.7
CC=x86_64-pc-linux-gnu-gcc \
ac_cv_func_closedir_void=no \
ac_cv_header_stdc=yes \
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu
make cmp diff
install -Dm755 cmp /system/bootstrap/bin/cmp
install -Dm755 diff /system/bootstrap/bin/diff
)
rm -rf diffutils-2.7
rm -rf sed-4.0.6
tar zxf sed-4.0.6.tar.gz
( cd sed-4.0.6
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls \
am_cv_func_working_getline=yes
make -C lib
make -C sed
install -Dm755 sed/sed /system/bootstrap/bin/sed
)
rm -rf sed-4.0.6
rm -rf patch-2.5.9
tar zxf patch-2.5.9.tar.gz
( cd patch-2.5.9
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu
make patch
install -Dm755 patch /system/bootstrap/bin/patch
)
rm -rf patch-2.5.9
rm -rf gawk-3.1.8
tar jxf gawk-3.1.8.tar.bz2
( cd gawk-3.1.8
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls
make gawk
install -Dm755 gawk /system/bootstrap/bin/gawk
ln -sf gawk /system/bootstrap/bin/awk
)
rm -rf gawk-3.1.8
rm -rf make-3.82
tar jxf make-3.82.tar.bz2
( cd make-3.82
./configure \
--build=i686-pc-linux-gnu \
--host=x86_64-pc-linux-gnu \
--disable-nls
make make
install -Dm755 make /system/bootstrap/bin/make
)
rm -rf make-3.82
# Add /bin/sh symlink
mkdir -p /system/bin
ln -sf ../bootstrap/bin/bash /system/bin/bash
ln -sf bash /system/bin/sh
# Strip everything (saves hundreds of MB)
find /system/bootstrap/lib /system/bootstrap/lib32 -type f -name '*.a' | xargs x86_64-pc-linux-gnu-strip --strip-debug || true
find /system/bootstrap/lib /system/bootstrap/lib32 -type f -name '*.so*' | xargs x86_64-pc-linux-gnu-strip --strip-unneeded || true
find /system/bootstrap/bin /system/bootstrap/sbin /system/bootstrap/libexec -type f | xargs x86_64-pc-linux-gnu-strip --strip-all || true
# Clean up
#rm -rf /cross
rm -rf /system/bootstrap/share /system/bootstrap/var /system/bootstrap/etc
rm -f /system/bootstrap/lib/*.la /system/bootstrap/lib32/*.la /system/bootstrap/lib/libstdc++.so.*-gdb.py /system/bootstrap/lib32/libstdc++.so.*-gdb.py
# Back it up
cd /system
# Too many files to fit on single xargs command...
rm -f cross.tar
find bootstrap bin/sh bin/bash -type f -o -type l | LC_ALL=C sort | xargs tar --mtime=@0 --numeric-owner --owner=0 --group=0 -rf cross.tar
gzip -nv cross.tar
# Now you should reboot into a system with a kernel supporting the target architecture.
# Building a kernel+utilities for such a system is outside the scope of this script.
# Enter cross-chroot:
# ./bootstrap/bin/chroot . /bootstrap/bin/env -i PATH=/bootstrap/bin /bootstrap/bin/sh -l

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427a4257055af6d35ee389e211300604b4e5edbb builds/binaries.tar.gz
be27f8f4dd7eb36033afaedb08746d3bf9b9284d builds/bootstrap.tar.gz
7df8133faddb1cdb8531e40f0db16e6e1270a4fe builds/cross.tar.gz

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13
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#!/bin/sh
set -eu
mkdir -p sources
cd sources
wget -c -i ../sources.wget-list
mv gcc-boot-2.95.3.patch\?id=* gcc-boot-2.95.3.patch
mv glibc-boot-2.16.0.patch\?id=* glibc-boot-2.16.0.patch
mv glibc-boot-2.2.5.patch\?id=* glibc-boot-2.2.5.patch
sha1sum -c ../sources.sha1

33
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Required bootstrap binaries (sorted as in busybox menuconfig)
Archival Utilities:
- zcat
- tar
Coreutils:
- basename
- cat
- chmod
- chroot (self dep)
- cp
- dirname
- echo
- env (self dep)
- expr
- install
- ln
- ls
- mkdir
- mv
- pwd
- rm
- sleep
- sort
- touch
- tr
- true
- uniq
Editors:
- cmp
- sed
Shells:
- ash

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534c7ee46331ff1f1fc96a378fd6a9f6b322a242 bison-3.7.1.tar.xz
f17235bc9c3aec538065a655681815c242a6d7d5 ca-certificates_20200601.tar.xz
8df6cb570c8d6596a67d1c0773bf00650154f7aa libffi-3.3.tar.gz
228604686ca23f42e48b98930babeb5d217f1899 m4-1.4.18.tar.xz
7d9d11eb36cfb752da1fb11bb3e521d2a3cc8830 make-4.2.1.tar.bz2
6a4098623cd65b9037b301b8f71c62454ccab2d9 mktemp-1.7.tar.gz
b213a293f2127ec3e323fb3cfc0c9807664fd997 openssl-1.1.1g.tar.gz
1003c6aa71d8966501038178459a9fa4e9aba747 perl-5.30.3.tar.xz
2ef586fd14af9c99a8c01d9ff75ec656c5f9a175 portage-3.0.8.tar.bz2
e1de02779a89a94000c0ed340ec126de25825f2f Python-3.7.9.tar.xz
00823f43901e7da39f3f0daf20ec9efae47e959e rsync-3.2.3.tar.gz
61bd770062d49cdab3f0f45df473e2bf950ba266 sed-4.8.tar.xz
2b886eab5b97267cc358ab35e42d14d33d6dfc95 wget-1.20.3.tar.gz
fa2ae4db119f639a01b02f99f1ba671ece2828eb xz-5.2.5.tar.gz
e6d119755acdf9104d7ba236b1242696940ed6dd zlib-1.2.11.tar.gz

15
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https://tukaani.org/xz/xz-5.2.5.tar.gz
https://zlib.net/zlib-1.2.11.tar.gz
https://github.com/libffi/libffi/releases/download/v3.3/libffi-3.3.tar.gz
https://www.python.org/ftp/python/3.7.9/Python-3.7.9.tar.xz
https://www.cpan.org/src/5.0/perl-5.30.3.tar.xz
https://www.openssl.org/source/old/1.1.1/openssl-1.1.1g.tar.gz
https://ftp.gnu.org/gnu/wget/wget-1.20.3.tar.gz
https://rsync.samba.org/ftp/rsync/src/rsync-3.2.3.tar.gz
https://www.mktemp.org/dist/mktemp-1.7.tar.gz
http://deb.debian.org/debian/pool/main/c/ca-certificates/ca-certificates_20200601.tar.xz
https://dev.gentoo.org/~zmedico/portage/archives/portage-3.0.8.tar.bz2
https://ftp.gnu.org/gnu/m4/m4-1.4.18.tar.xz
https://ftp.gnu.org/gnu/bison/bison-3.7.1.tar.xz
https://ftp.gnu.org/gnu/make/make-4.2.1.tar.bz2
https://ftp.gnu.org/gnu/sed/sed-4.8.tar.xz

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#!/bin/sh
set -e
# Run this script in a recent stage3 tarball to grab all required software versions and URLs.
root="${1:-/}"
pkgs="
app-arch/xz-utils
sys-libs/zlib
dev-libs/libffi
dev-lang/python
dev-lang/perl
dev-libs/openssl
net-misc/wget
net-misc/rsync
app-misc/ca-certificates
sys-apps/portage
sys-devel/m4
sys-devel/bison
sys-devel/make
sys-apps/sed
"
for x in $pkgs; do
ver="$(portageq best_visible "$root" ebuild "$x")"
echo "$ver"
portageq metadata "$root" ebuild "$ver" SRC_URI
echo
done

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Based on portage-3.0.8 and gentoo-20201031 snapshot
The specifics of this document (software versions and whatnot) are subject to
change as gentoo evolves, but I hope the big lines of it won't change too
much.
This guide starts off with a system built from build_cross.sh, built for
x86_64 with i686 multilib.
It might be possible to adapt both that script, and this guide for other
architectures, but this guide won't go into detail.
You should be running a system with a x86_64 kernel (with i686 support).
Install the required sources (listed in gentoo.wget-list) into /sources.
To enter the bootstrap system as a chroot, use the following commands to set
up the filesystems and entering:
mkdir -p proc sys dev tmp
mount -t proc proc proc
mount -t sysfs sysfs sys
mount -t devtmpfs devtmpfs dev
mount -t devpts devpts dev/pts
mount -t tmpfs tmpfs dev/shm
mkdir -p etc
touch etc/resolv.conf
mount --bind /etc/resolv.conf etc/resolv.conf
./bootstrap/bin/chroot . /bootstrap/bin/env -i PATH=/bin:/sbin:/usr/bin:/usr/sbin:/bootstrap/bin:/bootstrap/sbin HOME=/root /bootstrap/bin/sh -l
To install all the prerequisite tools, place the sources (listed in
gentoo.wget-list) under /sources, then run the gentoo_tools.sh script.
Configure portage:
echo "root:x:0:0:root:/root:/bin/bash" > /etc/passwd
echo "root:x:0:root" > /etc/group
echo "portage:x:250:250:portage:/var/tmp/portage:/bin/false" >> /etc/passwd
echo "portage::250:portage" >> /etc/group
echo "C UTF-8" > /etc/locale.gen
mkdir -p /tmp /root
chown root.root /tmp /root
chmod 1777 /tmp
chmod 0700 /root
cat > /etc/portage/make.conf << 'EOF'
FEATURES='-pid-sandbox -news'
ROOTPATH=/bootstrap/bin:/bootstrap/sbin
EOF
ln -sf ../../var/db/repos/gentoo/profiles/default/linux/amd64/17.1/ /etc/portage/make.profile
Install ebuild repository (pick appropriate date, see distfiles.gentoo.org/snapshots):
emerge-webrsync -v --revert=20201031
Install some ebuild prerequisites:
emerge -O1 sys-apps/gentoo-functions # Used by elt-patches and a ton of other things
emerge -O1 app-portage/elt-patches # required by elibtoolize(libtool.eclass), used to install any library
emerge -O1 sys-devel/gnuconfig # required by gnuconfig_update(gnuconfig.eclass), used by toolchain(-glibc).eclass, doesn't hurt to have
emerge -O1 sys-devel/binutils-config sys-devel/gcc-config
First, we will build an updated binutils+gcc combo that targets /usr instead
of /bootstrap. This makes it easier to bootstrap glibc and everything else. We
will use portage for this, even though it's a mess.
NOTE: Doing this is (probably) *BAAAAD*, since we're linking the compiler
support libraries with a potentially incompatible version of glibc in
/bootstrap, and upgrading it afterwards. Glibc should always be installed
first into a new prefix! However, due to the complex relationship between
glibc, gcc, libgcc and libstdc++, this is rather hard to do while wrangling
the change from /bootstrap to /usr, as well as the multilib libdir changes, so
for simplicity's sake, I won't bother. This just works™.
Install temporary libc files for target compiler:
mkdir -p /lib64 /lib
ln -sf /bootstrap/lib/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2
ln -sf /bootstrap/lib32/ld-linux.so.2 /lib/ld-linux.so.2
mkdir -p /usr/include
ln -sf /bootstrap/include/limits.h /usr/include/limits.h
mkdir -p /usr/lib64 /usr/lib
ln -sf /bootstrap/lib/{crti,crtn,Scrt1}.o \
/bootstrap/lib/{libc,libm,libpthread}.so /usr/lib64/
ln -sf /bootstrap/lib32/{crti,crtn,Scrt1}.o \
/bootstrap/lib32/{libc,libm,libpthread}.so /usr/lib/
Install binutils+GCC (linked against /bootstrap):
USE='-*' emerge -O1 sys-devel/binutils
USE='-* static-libs' EXTRA_ECONF=--disable-shared \
CPPFLAGS='-isystem/usr/include' LDFLAGS='-L/usr/lib64 -L/usr/lib' \
emerge -O1 dev-libs/gmp dev-libs/mpfr dev-libs/mpc
USE='-*' EXTRA_ECONF=--disable-bootstrap GCC_MAKE_TARGET=all \
CPPFLAGS='-isystem/usr/include' LDFLAGS='-L/usr/lib64 -L/usr/lib' \
CPATH=/bootstrap/include \
emerge -O1 sys-devel/gcc
emerge --rage-clean dev-libs/gmp dev-libs/mpfr dev-libs/mpc
gcc-config 1 # Not automatic unlike binutils-config...
NOTE: The Glibc ebuild downloads a file called gcc-multilib-bootstrap, which
contains prebuilt binaries to bootstrap multilib gcc. This is _only_ used when
the command "echo 'int main(){}' | $CC -m32 -xc -" fails, and shouldn't be
being used in this bootstrap, but you can make sure of that by patching the
ebuild to `die` instead of running the `sed` command to enable its use.
NOTE: BOOTSTRAP_RAP=1 is only used in the Glibc ebuild, to avoid a pre-install
check that might pick up programs from /bootstrap to test against the
installed glibc, as well as picking up python from $PATH instead of
eselect-python. I'm not aware of how the support status is for this variable,
and as such it might disappear in the future, or be used in more packages.
Install initial glibc:
CC=/bootstrap/bin/gcc emerge -O1 sys-kernel/linux-headers
USE='-*' BOOTSTRAP_RAP=1 emerge -O1 sys-libs/glibc
NOTE: `sandbox` outputs a failure message to stderr for every program still
built against /bootstrap, which includes the compiler. Some autoconf scripts
check stderr to determine a failure, so this causes builds to fail. This is
why it's (partially) disabled for this stage.
Bootstrap the rest of the system:
USE=-seccomp emerge -O1 app-misc/pax-utils
cd /var/db/repos/gentoo/scripts
mkdir -p /var/run
ln -s /bootstrap/bin/python3 /usr/bin/python
rm -f /etc/profile.env
USE=-nls FEATURES=-usersandbox BOOTSTRAP_RAP=1 ./bootstrap.sh
Reinitialize the environment:
env-update
exec bash -l
export PATH=$PATH:/bootstrap/bin:/bootstrap/sbin
In the following stages, you'll get tons of LD_PRELOAD libsandbox.so errors
from programs still linked against /bootstrap. This is safe to ignore, and
will gradually disappear as programs are rebuilt.
It'd be nice to remove the bootstrap tools now, but among wget/openssl, gawk,
gzip, grep, and other tools, they're still required for some reason.
From this point onward, you're pretty much on your own to beat portage into
performing an `emerge -e @system` and fixing any unspecified dependencies you
encounter along the way. This can be done in a whole number of ways, and will
differ on any given day, since this is painfully unsupported by gentoo devs.
Because the order in which you install everything can differ wildly, and
consequently affect the output of your build, it is advised to do a second
`emerge -e @system` afterwards, for sanity. Below I detail my most recent
procedure, which, I can't stress enough, may or may not work at the time
you're reading this.
Fix circular dependencies:
USE=-filecaps emerge -O1 sys-libs/pam
USE='-acl -xattr' emerge -O1 sys-apps/shadow # required by acct-group/acct-user
Verify there's no circular deps left, for sanity:
emerge -fe @system
Build everything:
emerge -e @system
Clean up bootstrap tools/configs:
rm -rf /bootstrap /sources
rm -f /etc/portage/make.conf
Reinitialize environment:
env-update
exec bash -l
Consider rebuilding everything again without /bootstrap, since a lot of
packages couldn't be properly stripped, and a bunch of other tools have been
upgraded, during the first emerge -e @system:
emerge -be @system
To install everything into a clean root:
ROOT=/final emerge -K @system
Prepare files for catalyst:
mkdir -p /var/tmp/catalyst/snapshots
wget -O gentoo-latest.tar.xz http://distfiles.gentoo.org/snapshots/gentoo-latest.tar.xz
mkdir -p /var/tmp/catalyst/builds/default
cd /var/tmp/catalyst/builds/default
tar -C /final -cf stage3-amd64-latest.tar .
xz -9v stage3-amd64-latest.tar
rm -rf /final
wget -O stage1.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage1.spec"
wget -O stage2.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage2.spec"
wget -O stage3.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage3.spec"
sed -i -e 's/@TIMESTAMP@/latest/' -e '/^portage_confdir: /d' *.spec
Build the stage3:
emerge catalyst
catalyst -f stage1.spec
Clean up chroot:
umount -R proc sys dev etc/resolv.conf

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This is done in a chroot, from a 10.0 chapter 7 system. To do this on a live
system, you'll need a kernel, initscripts, and some way to connect to the
internet, such as iproute+dhcpcd.
Make sure you bind-mount your host's /etc/resolv.conf to the chroot, such as:
touch $LFS/etc/resolv.conf
mount -v --bind /etc/resolv.conf $LFS/etc/resolv.conf
This will allow programs to resolve DNS names, which is necessary to download things.
Also mount /dev/shm, in addition to the mounts in chapter 7.3:
mount -t tmpfs tmpfs $LFS/dev/shm
Run the following chapters (avoid tests and docs):
- 8.9. Zlib-1.2.11
- 8.10. Bzip2-1.0.8
- 8.34. Bash-5.0
- 8.47. Libffi-3.3
- 8.48. OpenSSL-1.1.1g
- 8.49. Python-3.8.5 (!--with-system-expat --without-ensurepip)
Symlink python3:
ln -sf python3 /usr/bin/python
Install ca-certificates:
make
mkdir -p /usr/share/ca-certificates
make install
( cd /usr/share/ca-certificates
find . -name '*.crt' | LC_ALL=C sort | cut -b3-
) > /etc/ca-certificates.conf
mkdir -p /etc/ssl/certs
update-ca-certificates
Install wget:
./configure --prefix=/usr --sysconfdir=/etc --with-ssl=openssl --with-libssl-prefix=/usr
make
make install
Install portage (https://wiki.gentoo.org/wiki/Portage#Tarball):
python setup.py install
echo "portage:x:250:250:portage:/var/tmp/portage:/bin/false" >> /etc/passwd
echo "portage::250:portage" >> /etc/group
Install repository (https://bouncer.gentoo.org/fetch/root/all/snapshots/, grab gentoo-*.tar.xz):
rm -rf /var/db/repos
mkdir -p /var/db/repos
mv gentoo-*/ /var/db/repos/gentoo
Configure portage:
mkdir -p /etc/portage
ln -sf ../../var/db/repos/gentoo/profiles/default/linux/amd64/17.1/ /etc/portage/make.profile
emerge -O1 sys-apps/baselayout
. /etc/profile
cat /var/lib/gentoo/news/news-gentoo.unread >> /var/lib/gentoo/news/news-gentoo.read
rm /var/lib/gentoo/news/news-gentoo.unread
touch /var/lib/gentoo/news/news-gentoo.unread
dispatch-conf
Bootstrap multilib compiler:
emerge -O1 sys-apps/gentoo-functions sys-devel/binutils-config sys-devel/gcc-config app-portage/elt-patches sys-devel/binutils dev-libs/gmp dev-libs/mpfr dev-libs/mpc
emerge -Of sys-devel/gcc
tar xf /var/cache/distfiles/gcc-*.tar.* && cd gcc-*/ && mkdir build && cd build
mkdir -p /tmp/gcc/include
touch /tmp/gcc/include/limits.h
../configure --prefix=/usr --with-local-prefix=/tmp/gcc --with-newlib --without-headers --disable-shared --disable-threads --disable-bootstrap --enable-multilib --enable-languages=c,c++
make all-gcc all-target-libgcc
make install-gcc install-target-libgcc
rm -rf /tmp/gcc
cd ../.. && rm -rf gcc-*/
Remove use of gcc-multilib-bootstrap, since that defeats the point of building
everything from source, and we don't need it with this hack:
cd /var/db/repos/gentoo/sys-libs/glibc
cp -u glibc-2.31-r6.ebuild{,.orig}
sed -e '/gcc-multilib-bootstrap/d' glibc-2.31-r6.ebuild.orig > glibc-2.31-r6.ebuild
ebuild glibc-2.31-r6.ebuild manifest
PYTHON_COMPAT_OVERRIDE=python3 emerge -O1 sys-libs/glibc
...in case of downgrade, reinstall any LFS programs that broke (using the
/tools toolchain?) until portage works again, and reinstall glibc, run
ldconfig and fix all warnings.
Alternatively, build LFS with an older glibc or unmask the same glibc version
that LFS has...
Clean up glibc modifications:
cd /var/db/repos/gentoo/sys-libs/glibc
mv glibc-2.31-r6.ebuild.orig glibc-2.31-r6.ebuild
ebuild glibc-2.31-r6.ebuild manifest
Not sure if this is necessary if not downgrading, but for good measure:
tar xf /var/cache/distfiles/gcc-*.tar.* && cd gcc-*/ && mkdir build && cd build
../libstdc++-v3/configure --prefix=/usr --enable-multilib
make
make install
cd ../.. && rm -rf gcc-*/
emerge -O1 sys-devel/gcc
PYTHON_COMPAT_OVERRIDE=python3 emerge -O1 sys-libs/glibc # might be necessary to merge _after_ pax-utils?
Bootstrap rest of system:
emerge -O1 sys-libs/libseccomp app-misc/pax-utils # required by at least ncurses and sandbox
emerge -O1 sys-apps/sandbox
USE=-acl emerge -O1 sys-devel/gettext # circular dep, bundles libxml2, abusing this fact...
USE=-acl emerge -O1 net-misc/rsync # required by linux-headers
emerge -O1 dev-util/pkgconf # required by pax-utils
cd /var/db/repos/gentoo/scripts
./bootstrap.sh
USE=-pam emerge -O1 sys-libs/libcap # circular dep
USE='-acl -xattr -pam' emerge -O1 sys-apps/shadow # required by acct-group
emerge -abe @system
Unpollute the system by installing it somewhere else:
ROOT=/final emerge -K @system

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Based on portage-3.0.8 and gentoo-20201029
The specifics of this document (software versions and whatnot) are subject to
change as gentoo evolves, but I hope the big lines of it won't change too
much.
This guide starts off with a system built from build_cross.sh, built for
x86_64 with i686 multilib.
It might be possible to adapt both that script, and this guide for other
architectures, but this guide won't go into detail.
You should be running a system with a x86_64 kernel (with i686 support).
Install the required sources (outlined in gentoo.wget-list) into /sources.
To enter the bootstrap system as a chroot, use the following commands to set
up the filesystems and entering:
mkdir -p proc sys dev tmp
mount -t proc proc proc
mount -t sysfs sysfs sys
mount -t devtmpfs devtmpfs dev
mount -t devpts devpts dev/pts
mount -t tmpfs tmpfs dev/shm
mkdir -p etc
touch etc/resolv.conf
mount --bind /etc/resolv.conf etc/resolv.conf
./bootstrap/bin/chroot . /bootstrap/bin/env -i PATH=/bin:/sbin:/usr/bin:/usr/sbin:/bootstrap/bin:/bootstrap/sbin HOME=/root /bootstrap/bin/sh -l
To install all the prerequisite tools, place the sources (listed in
gentoo.wget-list) under /sources, then run the gentoo_tools.sh script.
Install ebuild repository:
tar xf gentoo-*.tar.xz
mkdir -p /var/db/repos/
mv gentoo-*/ /var/db/repos/gentoo
Configure portage:
echo "root:x:0:0:root:/root:/bin/bash" > /etc/passwd
echo "root:x:0:root" > /etc/group
echo "portage:x:250:250:portage:/var/tmp/portage:/bin/false" >> /etc/passwd
echo "portage::250:portage" >> /etc/group
mkdir -p /tmp /root
chown root.root /tmp /root
chmod 1777 /tmp
chmod 0700 /root
ln -sf ../../var/db/repos/gentoo/profiles/default/linux/amd64/17.1/ /etc/portage/make.profile
cat > /etc/portage/make.conf << 'EOF'
FEATURES=-pid-sandbox
ROOTPATH=/bootstrap/bin:/bootstrap/sbin
EOF
Install some prerequisites:
emerge -O1 sys-apps/gentoo-functions # Used by elt-patches and a ton of other things
emerge -O1 app-portage/elt-patches # required by elibtoolize(libtool.eclass), used to install any library
TODO: Doing this is *BAAAAD*, since we're linking the compiler and libraries
with a potentially incompatible version of glibc in /tools, and upgrading it
afterwards. Glibc should always be installed first into a new prefix!
I just can't be assed to discuss the manual upgrade of binutils+gcc and their
dependency tools.
TODO: Consider installing sys-devel/gnuconfig for the config.sub and
config.guess scripts.
Bootstrap GCC:
# Install linker at final location,
# so programs built with the new compiler can run...
mkdir -p /lib64 /lib
ln -sf /bootstrap/lib/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2
ln -sf /bootstrap/lib32/ld-linux.so.2 /lib/ld-linux.so.2
# Target compiler expects target limits.h to be available in target prefix...
mkdir -p /usr/include
ln -sf /bootstrap/include/limits.h /usr/include/limits.h
# GCC errors out at the first incompatible startfile in LIBRARY_PATH,
# so multilib paths need to be fixed to match the final compiler...
mkdir -p /usr/lib64 /usr/lib
ln -sf /bootstrap/lib/crti.o /bootstrap/lib/crtn.o /bootstrap/lib/Scrt1.o /usr/lib64/
ln -sf /bootstrap/lib32/crti.o /bootstrap/lib32/crtn.o /bootstrap/lib32/Scrt1.o /usr/lib/
# Reconfigure GCC to match the config of the final compiler as much as possible.
cat > /etc/portage/gcc.specs << 'EOF'
*multilib:
. !m64 !m32;64:../lib64 m64 !m32;32:../lib !m64 m32;
*startfile_prefix_spec:
/usr/lib/
*link:
+ %{!shared:%{!static:-dynamic-linker %{m32:/lib/ld-linux.so.2;:/lib64/ld-linux-x86-64.so.2}}}
*cpp:
+ -isystem /usr/include
EOF
cat > /etc/portage/bashrc << 'EOF'
export C_INCLUDE_PATH=/usr/include:/bootstrap/include
export CPLUS_INCLUDE_PATH=/usr/include:/bootstrap/include
export LIBRARY_PATH=/usr/lib64:/usr/lib:/bootstrap/lib:/bootstrap/lib32
export LD_LIBRARY_PATH=/usr/lib64:/usr/lib:/bootstrap/lib:/bootstrap/lib32
export CC='gcc -specs=/etc/portage/gcc.specs'
export CXX='g++ -specs=/etc/portage/gcc.specs'
EOF
emerge -O1 sys-libs/zlib dev-libs/gmp dev-libs/mpfr dev-libs/mpc
emerge -O1 sys-devel/binutils-config sys-devel/binutils
emerge -O1 sys-devel/gcc-config sys-devel/gcc
/usr/bin/gcc-config 1 # Not automatic unlike binutils-config
Make portage forget about everything it's just installed, so it's all rebuilt
first thing when running bootstrap.sh/emerge later:
rm -rf /var/db/pkg
Install initial glibc:
CC=gcc emerge -O1 sys-kernel/linux-headers
mkdir -p /usr/bin/
ln -sf /bootstrap/bin/python3 /usr/bin/python3tmp
PYTHON_COMPAT_OVERRIDE=python3tmp emerge -O1 sys-libs/glibc
rm -f /usr/bin/python3tmp
This compiler and dynamic linker will now pick up everything correctly under
/usr instead of /bootstrap:
rm -f /etc/portage/bashrc /etc/portage/gcc.specs
Build the remainder of bootstrap utilities:
cd /var/db/repos/gentoo/scripts
rm -f /etc/profile.env
mkdir -p /var/run
USE=-nls ./bootstrap.sh
You'll get tons of LD_PRELOAD libsandbox.so errors from programs still linked
against /bootstrap. This is fine to ignore, and will gradually disappear as
programs are rebuilt.
It'd be nice to remove the bootstrap tools now, but among wget/openssl, gawk,
gzip, grep, and other tools, they're still required for some reason.
From this point onward, you're pretty much on your own to beat portage into
performing an `emerge -e @system` and fixing any unspecified dependencies you
encounter along the way. This can be done in a whole number of ways, and will
differ on any given day, since this is painfully unsupported by gentoo devs.
Because the order in which you install everything can differ wildly, and
consequently affect the output of your build, it is advised to do a second
`emerge -e @system` afterwards, for sanity. Below I detail my most recent
procedure, which, I can't stress enough, may or may not work at the time
you're reading this.
Fix circular dependencies:
USE=-filecaps emerge -O1 sys-libs/pam
USE='-acl -xattr' emerge -O1 sys-apps/shadow # required by acct-group/acct-user
Verify there's no circular deps left, for sanity:
emerge -fe @system
Build everything:
emerge -be @system
Clean up bootstrap tools/configs:
rm -rf /bootstrap /sources
rm -f /etc/portage/make.conf
Reinitialize environment:
env-update
exec bash -l
Consider rebuilding everything again without /bootstrap, as surely a lot
errors popped up during the first emerge -be @system, can't be sure enough.
To install everything into a clean root:
ROOT=/final emerge -K @system
Prepare files for catalyst:
mkdir -p /var/tmp/catalyst/snapshots
wget -O gentoo-latest.tar.xz http://distfiles.gentoo.org/snapshots/gentoo-latest.tar.xz
mkdir -p /var/tmp/catalyst/builds/default
cd /var/tmp/catalyst/builds/default
tar -C /final -cf stage3-amd64-latest.tar .
xz -9v stage3-amd64-latest.tar
rm -rf /final
wget -O stage1.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage1.spec"
wget -O stage2.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage2.spec"
wget -O stage3.spec "https://gitweb.gentoo.org/proj/releng.git/plain/releases/specs/amd64/stage3.spec"
sed -i -e 's/@TIMESTAMP@/latest/' -e '/^portage_confdir: /d' *.spec
Build the stage3:
emerge catalyst
catalyst -f stage1.spec

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#!/bin/sh
set -e
# This script builds and upgrades a bunch of prerequisite tools for gentoo
# There's just too many small details about these to cover properly in a text file...
# Maintenance note: Run gentoo_gen.sh in a fully-updated stable system to get
# the appropriate package versions and URLs.
version_xz=5.2.5
version_zlib=1.2.11
version_libffi=3.3
version_python=3.7.9
version_perl=5.30.3
version_openssl=1.1.1g
version_wget=1.20.3
version_rsync=3.2.3
version_mktemp=1.7
version_ca_certificates=20200601
version_portage=3.0.8
version_m4=1.4.18
version_bison=3.7.1
version_make=4.2.1
version_sed=4.8
export MAKEFLAGS="-j${NPROC:-$(getconf _NPROCESSORS_ONLN)}"
# This symlink isn't provided by the bootstrap, but is necessary for a ton of tools
mkdir -p /usr/bin
ln -sf ../../bootstrap/bin/env /usr/bin/env
cd /sources
export PATH=/bootstrap/bin
# Xz is required to unpack a lot of tarballs, including the Portage tree.
# app-arch/xz-utils:
rm -rf xz-$version_xz
tar zxf xz-$version_xz.tar.gz
( cd xz-$version_xz
./configure --prefix=/bootstrap
make
make install
)
rm -rf xz-$version_xz
# Zlib is required for the zlib Python module, used by Portage.
# sys-libs/zlib:
rm -rf zlib-$version_zlib
tar zxf zlib-$version_zlib.tar.gz
( cd zlib-$version_zlib
./configure --prefix=/bootstrap
make
make install
)
rm -rf zlib-$version_zlib
# Libffi is required for the _ctypes Python module, used by Portage.
# dev-libs/libffi:
rm -rf libffi-$version_libffi
tar zxf libffi-$version_libffi.tar.gz
( cd libffi-$version_libffi
# Fix an error that crops up due to using coreutils-5.0
sed -i -e 's/tail -1/tail -n 1/g' configure
./configure --prefix=/bootstrap
make
make install
)
rm -rf libffi-$version_libffi
# Portage is written in Python. Modern glibc also needs it to build.
# dev-lang/python:
rm -rf Python-$version_python
tar Jxf Python-$version_python.tar.xz
( cd Python-$version_python
./configure --prefix=/bootstrap --without-ensurepip
make
make install
ln -sf python3 /bootstrap/bin/python
)
rm -rf Python-$version_python
# Perl is required to build OpenSSL as well as some other things.
# dev-lang/perl:
rm -rf perl-$version_perl
tar Jxf perl-$version_perl.tar.xz
( cd perl-$version_perl
# Fix pwd hardcode
sed -i -e "s@'/bin/pwd'@'/bootstrap/bin/pwd'@" dist/PathTools/Cwd.pm
./Configure -des -Dprefix=/bootstrap -Dcc=gcc -Dinstallusrbinperl=n
make
make install
)
rm -rf perl-$version_perl
# OpenSSL is required for https support in wget.
# dev-libs/openssl:
rm -rf openssl-$version_openssl
tar zxf openssl-$version_openssl.tar.gz
( cd openssl-$version_openssl
./config --prefix=/bootstrap --openssldir=/bootstrap/etc/ssl
make
make install
)
rm -rf openssl-$version_openssl
# Wget is required to download the portage tree and packages.
# net-misc/wget:
rm -rf wget-$version_wget
tar zxf wget-$version_wget.tar.gz
( cd wget-$version_wget
./configure --prefix=/bootstrap --with-ssl=openssl --with-libssl-prefix=/bootstrap
make
make install
)
rm -rf wget-$version_wget
# Rsync is optional to run emerge-webrsync or emerge --sync,
# and required for linux-headers.
# net-misc/rsync:
rm -rf rsync-$version_rsync
tar zxf rsync-$version_rsync.tar.gz
( cd rsync-$version_rsync
./configure --prefix=/bootstrap --disable-simd --disable-xxhash --disable-zstd --disable-lz4
make
make install
)
rm -rf rsync-$version_rsync
# Mktemp is required by ca-certificates as well as Portage for installing packages.
# To avoid upgrading all coreutils, this standalone version is used.
# custom/mktemp:
rm -rf mktemp-$version_mktemp
tar zxf mktemp-$version_mktemp.tar.gz
( cd mktemp-$version_mktemp
./configure --prefix=/bootstrap
make
make install
)
rm -rf mktemp-$version_mktemp
# To verify https connections, wget/openssl need some certificates.
# They're installed directly here, instead of properly installing
# update-ca-certificates.
# app-misc/ca-certificates:
rm -rf ca-certificates_$version_ca_certificates
tar Jxf ca-certificates_$version_ca_certificates.tar.xz
mv work ca-certificates_$version_ca_certificates
( cd ca-certificates_$version_ca_certificates
make -C mozilla
mkdir -p /bootstrap/share/ca-certificates/mozilla
make -C mozilla CERTSDIR=/bootstrap/share/ca-certificates/mozilla install
find mozilla -name '*.crt' | LC_ALL=C sort > ca-certificates.conf
./sbin/update-ca-certificates \
--certsconf "$PWD/ca-certificates.conf" \
--certsdir /bootstrap/share/ca-certificates \
--etccertsdir /bootstrap/etc/ssl/certs
)
rm -rf ca-certificates_$version_ca_certificates
# Finally, install the package manager.
# sys-apps/portage:
rm -rf portage-$version_portage
tar jxf portage-$version_portage.tar.bz2
( cd portage-$version_portage
python3 setup.py install --system-prefix=/bootstrap
# This path is hardcoded...
# Symlinking the individual files so installing the final package will replace them properly.
mkdir -p /usr/share/portage/config/sets
ln -sf ../../../../bootstrap/share/portage/config/make.globals /usr/share/portage/config/make.globals
ln -sf ../../../../bootstrap/share/portage/config/repos.conf /usr/share/portage/config/repos.conf
ln -sf ../../../../../bootstrap/share/portage/config/sets/portage.conf /usr/share/portage/config/sets/portage.conf
)
rm -rf portage-$version_portage
## ...but that's not all!
## Here come the dependencies to build the initial gcc/glibc!
## These can be installed directly with portage but it's significantly cleaner not to...
# sys-devel/m4 (required by glibc-2.31):
rm -rf m4-$version_m4
tar Jxf m4-$version_m4.tar.xz
( cd m4-$version_m4
./configure --prefix=/bootstrap
make
make install
)
rm -rf m4-$version_m4
# sys-devel/bison (required by glibc-2.31):
rm -rf bison-$version_bison
tar Jxf bison-$version_bison.tar.xz
( cd bison-$version_bison
./configure --prefix=/bootstrap
make
make install
)
rm -rf bison-$version_bison
# sys-devel/make (>=4.0 required by glibc-2.31):
rm -rf make-$version_make
tar jxf make-$version_make.tar.bz2
( cd make-$version_make
./configure --prefix=/bootstrap
make
make install
)
rm -rf make-$version_make
# sys-apps/sed (>=4.3 required by glibc-2.31 for -E option):
rm -rf sed-$version_sed
tar Jxf sed-$version_sed.tar.xz
( cd sed-$version_sed
./configure --prefix=/bootstrap
make
make install
)
rm -rf sed-$version_sed

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

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mktemp is a peculiar phenomenon in the linux world.
Well, I'm sure things like this happen more often, but,
Turns out, there once was an mktemp.c written for OpenBSD.
Distributions started including it, writing their own version, the usual.
Apparently, popularity of this tool became big enough, and incompatibilities
between versions arose significantly, that it was split off into its own
package and website, https://www.mktemp.org, around 2000. Written by Todd C.
Miller, the author of sudo!
This version was included in Debian under the package name "debianutils", with
the last known version being debianutils-2.8.4, where it was split into its
own "mktemp" package, both reflecting the state of version 1.5.
https://lists.gnu.org/archive/html/bug-coreutils/2007-10/msg00051.html
In 2007, GNU coreutils adds its own, slightly incompatible version of mktemp
with coreutils version 6.10.
I can only assume most linux distributions switched to it, because come 2008,
mktemp-1.6 releases, featuring GNU compatibility.
Debian switches to coreutils inmediately, while Slackware keeps it for another
decade, citing the incompatibilities, and installing the GNU version as
mktemp-gnu, only reverting this decision in 2018.
I could've sworn one of my scripts ran into the differences between mktemp-1.5
and GNU mktemp, but I can't figure out what it was, and check for it, now.

98
gcc/notes/scrapped.sh
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# Contains a bunch of scrapped build procedures, for different purposes,
# so the research may be reused at a later date...
# tar (1.13), not in guix:
# Builds and works correctly, but has the same bug with extracting gcc-4.6
# as tar-1.12 does, and that one doesn't require patches...
rm -rf tar-1.13
gzip -cd tar-1.13.tar.gz | tar x
( cd tar-1.13
sed -e 's/if (case_sensitive$/if (1/' \
lib/argmatch.c > /tmp/sed; mv /tmp/sed lib/argmatch.c
CC=tcc ./configure --host=i686-pc-linux-gnu --disable-nls
echo '#define __MES_MODE_T' >> config.h
echo '#define S_ISLNK(Mode) (((Mode) & S_IFMT) == S_IFLNK)' >> config.h
make AR='tcc -ar'
install -Dm755 src/tar /bin/tar
)
rm -rf tar-1.13
# tar (1.14), not in guix:
# If this can be got to work, the build of tar-1.22 with gcc2 can be dropped.
# Builds, but extracting anything fails...
rm -rf tar-1.14
bzip2 -cd tar-1.14.tar.bz2 | tar x
( cd tar-1.14
# asctime doesn't exist in mes-libc and isn't used anyway...
sed -e 's/asctime (tm)/NULL/' \
lib/time_r.c > /tmp/sed; mv /tmp/sed lib/time_r.c
# mode_t and friends are in sys/stat.h...
sed -e 's@<sys/types.h>@<sys/stat.h>@' \
lib/modechange.h > /tmp/sed; mv /tmp/sed lib/modechange.h
# rewrite src/xheader.c:xheader_set_option to not use strtok:
# char *token = string;
# for (;;)
# {
# char *t = strchr (token, ',');
# if (t) *t = '\0';
#
# char *p = strchr (token, '=');
# if (!p)
# xheader_set_single_keyword (token);
# else
# xheader_set_keyword_equal (token, p);
#
# if (!t) break;
# token = t + 1;
# }
CC=tcc LD=tcc ./configure --disable-nls
# Add linux kernel defines that are missing from mes-libc
echo '#define MB_LEN_MAX 16' >> config.h
echo '#define CLOCK_REALTIME 0' >> config.h
echo '#define EPERM 1' >> config.h
make AR='tcc -ar'
install -Dm755 src/tar /bin/tar
)
rm -rf tar-1.14
# Options for a "minimal" bash-2.05b build
# Left out because even though it holds up just fine, no patches can be avoided
# with the minimal config.
# It might however be interesting to use a minimal config as a bootstrap bin?
CC='tcc -D_POSIX_VERSION=1' AR='tcc -ar' ./configure \
--build=i686-pc-linux-gnu \
--without-bash-malloc \
--enable-minimal-config \
--enable-cond-command \
--enable-dparen-arithmetic \
--enable-arith-for-command \
--enable-alias \
--disable-nls \
bash_cv_getcwd_calls_popen=no \
bash_cv_signal_vintage=posix \
ac_cv_func_working_mktime=yes
# gcc-4.6.4 build for build_binaries.sh
mkdir build; cd build # Build breaks without a build directory
CFLAGS='-O2 -w' CXXFLAGS='-O2 -w' MAKEINFO=true ../configure \
--target=i686-bootstrap-linux-gnu \
--prefix="$prefix" \
--with-sysroot="$prefix" \
--with-local-prefix=/ \
--with-newlib \
--without-headers \
--disable-shared \
--disable-decimal-float \
--disable-threads \
--disable-nls \
--enable-languages=c
make all-gcc all-target-libgcc
make install-gcc install-target-libgcc

39
gcc/sources.sha1
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@ -0,0 +1,39 @@
b3e158877f94e66ec1c8ef604e994851ee388b09 bash-2.05b.tar.gz
8de012df1e4f3e91f571c3eb8ec45b43d7c747eb bash-4.4.tar.gz
66b4f057bf687126d7cc11d0a68ed89182541ae7 binutils-2.14.tar.bz2
3f0e3746a15f806a95dd079be2a7f43c17b18818 binutils-2.20.1a.tar.bz2
d5514f5cf8eb89a3b20ac3b965f4463f14a5709a busybox-1.31.1.tar.bz2
bf7badf7e248e0ecf465d33c2f5aeec774209227 bzip2-1.0.8.tar.gz
ce67aacedfc917a92b5be62dd32095393c2f220c coreutils-5.0.tar.bz2
1638f4ee4a7bd269411c57874f9e761ddee6d5ae diffutils-2.7.tar.gz
f18e8aaee3f3d4173a1f598001003be8706d28b0 findutils-4.6.0.tar.gz
b9120c49429c309529a0af96203cec45a65790de gawk-3.0.0.tar.gz
da1091cc39089c320f53d21fd2112bd7ce407de5 gawk-3.1.8.tar.bz2
5bb0b783a57a62b11f1f9bd2aa37145da221d3d0 gcc-4.9.4.tar.bz2
b3e26d73b88c9606779a5ca277e3468e5ab163a1 gcc-boot-2.95.3.patch
705f2e5f854e12e56ac2f8351c36385a4426127e gcc-core-2.95.3.tar.gz
9b2f25ac248d81c97bbe46690dc2c350e51996a5 gcc-core-4.6.4.tar.bz2
e9a47df1bc5e39a9ef995484c315f5d47114daeb gcc-g++-4.6.4.tar.bz2
3bebc5a3120eafde2144ced6ee151e6c4934c781 glibc-2.16.0.tar.bz2
a2254adbc3486d24b56571cb464f77657579f6f1 glibc-2.2.5.tar.gz
ae3fb503e081f01d31eca5ebca8f2a1071f98414 glibc-boot-2.16.0.patch
594fccd05081469bacf73fcdfa8e0ec49fb1f7d3 glibc-boot-2.2.5.patch
c011e8feaf1bb89158bd55eaabd7ef8fdd101a2c gmp-4.3.2.tar.bz2
99e8f917557f1496cd3786e6c13f3900b8de24d8 grep-2.0.tar.gz
ca6794f49f3d838dab8add5d7895e90bd2479542 gzip-1.2.4.tar.gz
1631a93d870d11efc7ecaa1450c39ad0a7ad7408 linux-4.14.tar.gz
d2085842f08e57d58d3e1cd75a5f0342a60e5f45 make-3.80.tar.bz2
b8a8a99e4cb636a213aad3816dda827a92b9bbed make-3.82.tar.bz2
a318150059a2bcff6b58e765e203c05d0dfaccee mes-0.22.tar.gz
0d816fc6f2fea4e50f3ec75c644a6bd222294481 mescc-tools-Release_1.0.1.tar.gz
b8be66396c726fdc36ebb0f692ed8a8cca3bcc66 mpc-1.0.3.tar.gz
7ca93006e38ae6e53a995af836173cf10ee7c18c mpfr-2.4.2.tar.bz2
031062cf1a3c3e81e3dbae5ad2edbeff02ca198f musl-1.2.1.tar.gz
1b513b0615d6d273e0f1ec83e57f71e137c22d03 nyacc-0.99.3.tar.gz
9a69f7191576549255f046487da420989d2834a6 patch-2.5.9.tar.gz
d37e775c2b72864e8c27b8bedcbf6dddf81598af sed-1.18.tar.gz
3a841f31e3ed38c684c2ca9249ae42e1e7bdd438 sed-4.0.6.tar.gz
a426b8551a4b61289a1bb6d677ada162f8bbc51a tar-1.12.tar.gz
ca99a6ade7308f9293bdb04048cb335e52c63215 tar-1.22.tar.bz2
cfe72731b87047a0085e8a4b3487e208ea488224 tcc-0.9.26-1103-g6e62e0e.tar.gz
3bab3acd404ea92ba18e0c261d9d8cb2f366a8a5 tcc-0.9.27.tar.bz2

39
gcc/sources.wget-list
View File

@ -0,0 +1,39 @@
https://ftp.gnu.org/gnu/bash/bash-2.05b.tar.gz
https://ftp.gnu.org/gnu/bash/bash-4.4.tar.gz
https://ftp.gnu.org/gnu/binutils/binutils-2.14.tar.bz2
https://ftp.gnu.org/gnu/binutils/binutils-2.20.1a.tar.bz2
https://ftp.gnu.org/gnu/coreutils/coreutils-5.0.tar.bz2
https://ftp.gnu.org/gnu/diffutils/diffutils-2.7.tar.gz
https://ftp.gnu.org/gnu/findutils/findutils-4.6.0.tar.gz
https://ftp.gnu.org/gnu/gawk/gawk-3.0.0.tar.gz
https://ftp.gnu.org/gnu/gawk/gawk-3.1.8.tar.bz2
https://ftp.gnu.org/gnu/gcc/gcc-2.95.3/gcc-core-2.95.3.tar.gz
https://ftp.gnu.org/gnu/gcc/gcc-4.6.4/gcc-core-4.6.4.tar.bz2
https://ftp.gnu.org/gnu/gcc/gcc-4.6.4/gcc-g++-4.6.4.tar.bz2
https://ftp.gnu.org/gnu/gcc/gcc-4.9.4/gcc-4.9.4.tar.bz2
https://ftp.gnu.org/gnu/glibc/glibc-2.16.0.tar.bz2
https://ftp.gnu.org/gnu/glibc/glibc-2.2.5.tar.gz
https://ftp.gnu.org/gnu/gmp/gmp-4.3.2.tar.bz2
https://ftp.gnu.org/gnu/grep/grep-2.0.tar.gz
https://ftp.gnu.org/gnu/gzip/gzip-1.2.4.tar.gz
https://ftp.gnu.org/gnu/make/make-3.80.tar.bz2
https://ftp.gnu.org/gnu/make/make-3.82.tar.bz2
https://ftp.gnu.org/gnu/mes/mes-0.22.tar.gz
https://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz
https://ftp.gnu.org/gnu/mpfr/mpfr-2.4.2.tar.bz2
https://ftp.gnu.org/gnu/patch/patch-2.5.9.tar.gz
https://ftp.gnu.org/gnu/sed/sed-1.18.tar.gz
https://ftp.gnu.org/gnu/sed/sed-4.0.6.tar.gz
https://ftp.gnu.org/gnu/tar/tar-1.12.tar.gz
https://ftp.gnu.org/gnu/tar/tar-1.22.tar.bz2
https://sourceware.org/pub/bzip2/bzip2-1.0.8.tar.gz
http://lilypond.org/janneke/mes/20191117/tcc-0.9.26-1103-g6e62e0e.tar.gz
https://download.savannah.gnu.org/releases/tinycc/tcc-0.9.27.tar.bz2
https://download.savannah.gnu.org/releases/nyacc/nyacc-0.99.3.tar.gz
https://github.com/oriansj/mescc-tools/archive/Release_1.0.1/mescc-tools-Release_1.0.1.tar.gz
https://busybox.net/downloads/busybox-1.31.1.tar.bz2
https://musl.libc.org/releases/musl-1.2.1.tar.gz
https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.14.tar.gz
https://git.savannah.gnu.org/cgit/guix.git/plain/gnu/packages/patches/gcc-boot-2.95.3.patch?id=0b652851b187dd0451c221f6dc173afbd7a555f4
https://git.savannah.gnu.org/cgit/guix.git/plain/gnu/packages/patches/glibc-boot-2.2.5.patch?id=0b652851b187dd0451c221f6dc173afbd7a555f4
https://git.savannah.gnu.org/cgit/guix.git/plain/gnu/packages/patches/glibc-boot-2.16.0.patch?id=0b652851b187dd0451c221f6dc173afbd7a555f4
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