LFS系统构建01-宿主机环境搭建

¶LFS系统构建01-宿主机环境搭建

¶环境检查

• 运行shell脚本version_check.sh，具体代码由官方手册提供

#!/bin/bash
# Simple script to list version numbers of critical development tools
export LC_ALL=C
bash --version | head -n1 | cut -d" " -f2-4
MYSH=$(readlink -f /bin/sh)
echo "/bin/sh -> $MYSH"
echo $MYSH | grep -q bash || echo "ERROR: /bin/sh does not point to bash"
unset MYSH
echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
bison --version | head -n1
if [ -h /usr/bin/yacc ]; then
echo "/usr/bin/yacc -> `readlink -f /usr/bin/yacc`";
elif [ -x /usr/bin/yacc ]; then
echo yacc is `/usr/bin/yacc --version | head -n1`
else
echo "yacc not found"
fi
bzip2 --version 2>&1 < /dev/null | head -n1 | cut -d" " -f1,6-
echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
diff --version | head -n1
find --version | head -n1
gawk --version | head -n1
if [ -h /usr/bin/awk ]; then
echo "/usr/bin/awk -> `readlink -f /usr/bin/awk`";
elif [ -x /usr/bin/awk ]; then
echo awk is `/usr/bin/awk --version | head -n1`
else
echo "awk not found"
fi

gcc --version | head -n1
g++ --version | head -n1
ldd --version | head -n1 | cut -d" " -f2-
grep --version | head -n1
gzip --version | head -n1
cat /proc/version
m4 --version | head -n1
make --version | head -n1
patch --version | head -n1
echo Perl `perl -V:version`
sed --version | head -n1
tar --version | head -n1
makeinfo --version | head -n1
xz --version | head -n1

echo 'int main(){}' > dummy.c && g++ -o dummy dummy.c
if [ -x dummy ]
then echo "g++ compilation OK";
else echo "g++ compilation failed"; fi
rm -f dummy.c dummy

• 检查结果

bash, version 4.2.46(2)-release
/bin/sh -> /usr/bin/bash
Binutils: version 2.27-34.base.el7
./version_check.sh: line 10: bison: command not found
yacc not found
bzip2,  Version 1.0.6, 6-Sept-2010.
Coreutils:  8.22
diff (GNU diffutils) 3.3
find (GNU findutils) 4.5.11
GNU Awk 4.0.2
/usr/bin/awk -> /usr/bin/gawk
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
./version_check.sh: line 32: g++: command not found
(GNU libc) 2.17
grep (GNU grep) 2.20
gzip 1.5
Linux version 3.10.0-957.12.2.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Tue May 14 21:24:32 UTC 2019
m4 (GNU M4) 1.4.16
GNU Make 3.82
./version_check.sh: line 39: patch: command not found
Perl version='5.16.3';
sed (GNU sed) 4.2.2
tar (GNU tar) 1.26
./version_check.sh: line 43: makeinfo: command not found
xz (XZ Utils) 5.2.2
./version_check.sh: line 46: g++: command not found
g++ compilation failed

• 按照检查结果安装缺失软件

yum install bison byacc.x86_64 gcc-c++ patch texinfo.x86_64 epel-release.noarch

¶运行环境配置

1. 设置变量LFS

export LFS=/mnt/lfs

2. 挂载文件系统

mkfs.ext4 /dev/sdb
mkdir -pv $LFS
mount -v -t ext4 /dev/sdb $LFS

3. 创建sources目录放置源码

mkdir -v $LFS/sources
chmod -v a+wt $LFS/sources

4. 下载软件包

wget mirrors.ustc.edu.cn/lfs/lfs-packages/lfs-packages-8.4.tar
tar -xvf lfs-packages-8.4.tar -C $LFS/sources/

5. 检查软件包完整性

pushd $LFS/sources
md5sum -c sources/md5sums
popd

6. 创建tools目录，用于存储工具

mkdir -v $LFS/tools 
ln -sv $LFS/tools /

7. 创建lfs用户和组

groupadd lfs
useradd -s /bin/bash -g lfs -m -k /dev/null lfs
echo "" | passwd --stdin lfs

8. 设置目录权限

chown -v lfs $LFS/sources
chown -v lfs $LFS/tools

9. 配置lfs用户

cat > ~/.bash_profile << "EOF"
exec env -i HOME=$HOME TERM=$TERM PS1='\u:\w\$ ' /bin/bash
EOF
source ~/.bash_profile
cat > ~/.bashrc << "EOF"
set +h
umask 022
LFS=/mnt/lfs
LC_ALL=POSIX
LFS_TGT=$(uname -m)-lfs-linux-gnu
PATH=/tools/bin:/bin:/usr/bin
export LFS LC_ALL LFS_TGT PATH
EOF
source ~/.bashrc