A website documenting creating the build root for MidgardOS
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To build a MidgardOS build root, you must already have a relatively recent Linux operating system installed on your target build computer. Your host system should have the following software with the minimum versions indicated. Also note that many distributions will place software headers into separate packages, often in the form of “[package-name]-devel” or “[package-name]-dev”. Be sure to install those if your distribution provides them.
| Tool or Library | Version |
|---|---|
| Bash | 4.1 or higher |
| Binutils | 2.30 or higher |
| Bison | 3.0 or higher |
| Bzip2 | 1.0 or higher |
| Coreutils | 8.0 or higher |
| Diffutils | 3.6 or higher |
| Findutils | 4.8 or higher |
| Gawk | 4.2 or higher |
| GCC and G++ Compilers | 7 or higher |
| GLibC | 2.31 or higher |
| Grep | 3.1 or higher |
| GZip | 1.10 or higher |
| GNU Make | 4.2 or higher |
| GNU Ncurses | 5.3 or higher |
| Patch | 2.7 or higher |
| GNU Sed | 4.4 or higher |
| GNU Tar | 1.34 or higher |
| Texinfo | 6.5 or higher |
| XZ Utils | 5.2 or higher |
To see whether your host system has all the appropriate versions, create and run the following script. Read the output carefully for any errors, and make sure to install any packages that are reported as not found.
cat > version-check.sh << "EOF"
#!/bin/bash
# A script to list version numbers of critical development tools
# If you have tools installed in other directories, adjust PATH here AND
# in ~lfs/.bashrc (section 4.4) as well.
LC_ALL=C
PATH=/usr/bin:/bin
bail() { echo "FATAL: $1"; exit 1; }
grep --version > /dev/null 2> /dev/null || bail "grep does not work"
sed '' /dev/null || bail "sed does not work"
sort /dev/null || bail "sort does not work"
ver_check()
{
if ! type -p $2 &>/dev/null
then
echo "ERROR: Cannot find $2 ($1)"; return 1;
fi
v=$($2 --version 2>&1 | grep -E -o '[0-9]+\.[0-9\.]+[a-z]*' | head -n1)
if printf '%s\n' $3 $v | sort --version-sort --check &>/dev/null
then
printf "OK: %-9s %-6s >= $3\n" "$1" "$v"; return 0;
else
printf "ERROR: %-9s is TOO OLD ($3 or later required)\n" "$1";
return 1;
fi
}
ver_kernel()
{
kver=$(uname -r | grep -E -o '^[0-9\.]+')
if printf '%s\n' $1 $kver | sort --version-sort --check &>/dev/null
then
printf "OK: Linux Kernel $kver >= $1\n"; return 0;
else
printf "ERROR: Linux Kernel ($kver) is TOO OLD ($1 or later required)\n" "$kver";
return 1;
fi
}
# Coreutils first because --version-sort needs Coreutils >= 7.0
ver_check Coreutils sort 8.1 || bail "Coreutils too old, stop"
ver_check Bash bash 3.2
ver_check Binutils ld 2.13.1
ver_check Bison bison 2.7
ver_check Diffutils diff 2.8.1
ver_check Findutils find 4.2.31
ver_check Gawk gawk 4.0.1
ver_check GCC gcc 5.2
ver_check "GCC (C++)" g++ 5.2
ver_check Grep grep 2.5.1a
ver_check Gzip gzip 1.3.12
ver_check M4 m4 1.4.10
ver_check Make make 4.0
ver_check Patch patch 2.5.4
ver_check Perl perl 5.8.8
ver_check Python python3 3.4
ver_check Sed sed 4.1.5
ver_check Tar tar 1.22
ver_check Texinfo texi2any 5.0
ver_check Xz xz 5.0.0
ver_kernel 5.4
if mount | grep -q 'devpts on /dev/pts' && [ -e /dev/ptmx ]
then echo "OK: Linux Kernel supports UNIX 98 PTY";
else echo "ERROR: Linux Kernel does NOT support UNIX 98 PTY"; fi
alias_check() {
if $1 --version 2>&1 | grep -qi $2
then printf "OK: %-4s is $2\n" "$1";
else printf "ERROR: %-4s is NOT $2\n" "$1"; fi
}
echo "Aliases:"
alias_check awk GNU
alias_check yacc Bison
alias_check sh Bash
echo "Compiler check:"
if printf "int main(){}" | g++ -x c++ -
then echo "OK: g++ works";
else echo "ERROR: g++ does NOT work"; fi
rm -f a.out
if [ "$(nproc)" = "" ]; then
echo "ERROR: nproc is not available or it produces empty output"
else
echo "OK: nproc reports $(nproc) logical cores are available"
fi
EOF
bash version-check.sh 2>errors.log &&
[ -s errors.log ] && echo -e "\nThe following packages could not be found:\n$(cat errors.log)"
If using Fedora Linux as the build host operating system, it is safe to ignore the error that YACC is not bison.
Note that MidgardOS package builds require a system that is running x86-64 v2 or higher based hardware. To validate that your system is capable of this level of hardware support, run the following script on your host:
#!/usr/bin/awk -f
BEGIN {
while (!/flags/) if (getline < "/proc/cpuinfo" != 1) exit 1
if (/lm/&&/cmov/&&/cx8/&&/fpu/&&/fxsr/&&/mmx/&&/syscall/&&/sse2/) level = 1
if (level == 1 && /cx16/&&/lahf/&&/popcnt/&&/sse4_1/&&/sse4_2/&&/ssse3/) level = 2
if (level == 2 && /avx/&&/avx2/&&/bmi1/&&/bmi2/&&/f16c/&&/fma/&&/abm/&&/movbe/&&/xsave/) level = 3
if (level == 3 && /avx512f/&&/avx512bw/&&/avx512cd/&&/avx512dq/&&/avx512vl/) level = 4
if (level > 0) { print "CPU supports x86-64-v" level; exit level + 1 }
exit 1
}
If it outputs x86-64-v2 or higher, your system is adequate for use:
CPU supports x86-64-v2
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