These are just notes to develop lfs with musl.

Preparations

Conventions

Through the instructions some naming conventions are used. These are not a standard and could be freely chosen too, however:

• the core (operating) system will be installed in $LFS/qlnx
• the (cross-)tools will be in $LFS/_tools
• the downloads will be in $LFS/_sources (including patches from the book)
• The sources will be extracted under  /data/src 

Temporary required directories in  /  (of $LFS) will be prefixed with  _  (underscore), afterwards symlink'd (e.g.  /_usr → /usr . This makes it easier to identify directories which are not part of the final qLinux. The installation of musl requires a symlink  $LFS/qlnx → /qlnx . For historical compatibility reasons a symlink  $LFS/_tools → /tools  is recommended. If not stated otherwise each section starts in $LFS.

General Build Instructions

The build instructions are similar to the book.

Privileges

Some steps requires root privileges. Against the book it is highly recommended to use  sudo  and do not login as the root user. An example of an sudoers file (change it to your needs):

Defaults: LFS env_keep += "LFS"

User_Alias LFS = lfs

Cmnd_Alias X = /bin/ln -s, \
               /bin/chown

LFS ALL=(root) NOPASSWD: /home/users/lfs/dochroot
lfs ALL=(root) NOPASSWD: X

Add more commands to the  Cmnd_Alias  if required. From now on everything should be done with the lfs user.

Directories

By default we do not create a lot of directories like in the book but the real required ones at time. Right now there are two directories only:

mkdir -p $LFS/{qlnx,tmp}

Commonly directories will be created by make install of the packages. At some point it have to be done by hand. This will explicitly mentioned.

Environment

Before the chroot'ed environment will be entered an unprivileged user will be used. Create the lfs user. Make sure the the environment is clean, put the following into the user's shell start files:

set +h
umask 022
LFS=/mnt/LFS
LC_ALL=POSIX
LFS_TGT=$(uname -m)-linux-musl
PATH=/usr/bin
# add /bin to the path if it's not a symlink
if [ ! -L /bin ]; then PATH=$PATH:/bin; fi
PATH=$LFS/_tools/bin:$PATH
export LFS LC_ALL LFS_TGT PATH

With bash as shell put it into a file  ~./bashrc-lfs  and source it in  ~.bashrc  and/or  ~/.bash_profile .