8.77. Udev from Systemd-260.1

8.77.1. Installation of Udev

Udev is part of the systemd-260.1 package. Use the systemd-260.1.tar.xz file as the source tarball.

Remove two unneeded groups, render and sgx, from the default udev rules:

sed -e 's/GROUP="render"/GROUP="video"/' \
    -e 's/GROUP="sgx", //'               \
    -i rules.d/50-udev-default.rules.in

Remove one udev rule requiring a full Systemd installation:

sed -i '/systemd-sysctl/s/^/#/' rules.d/99-systemd.rules.in

Adjust the hardcoded paths to network configuration files for the standalone udev installation:

sed -e '/NETWORK_DIRS/s/systemd/udev/' \
    -i src/libsystemd/sd-network/network-util.h

Prepare Udev for compilation:

mkdir -p build
cd       build

meson setup ..                  \
      --prefix=/usr             \
      --buildtype=release       \
      -D mode=release           \
      -D dev-kvm-mode=0660      \
      -D link-udev-shared=false \
      -D logind=false           \
      -D vconsole=false

Get the list of the shipped udev helpers and save it into an environment variable (exporting it is not strictly necessary, but it makes building as a regular user or using a package manager easier):

export udev_helpers=$(grep "'name' :" ../src/udev/meson.build | \
                      awk '{print $3}' | tr -d ",'" | grep -v 'udevadm')

Only build the components needed for udev:

ninja udevadm systemd-hwdb                                           \
      $(ninja -n | grep -Eo '(src/(lib)?udev|rules.d|hwdb.d)/[^ ]*') \
      $(realpath libudev.so --relative-to .)                         \
      $udev_helpers

Install the package:

install -vm755 -d {/usr/lib,/etc}/udev/{hwdb.d,rules.d,network}
install -vm755 -d /usr/{lib,share}/pkgconfig
install -vm755 udevadm                             /usr/bin/
install -vm755 systemd-hwdb                        /usr/bin/udev-hwdb
ln      -svfn  ../bin/udevadm                      /usr/sbin/udevd
cp      -av    libudev.so{,*[0-9]}                 /usr/lib/
install -vm644 ../src/libudev/libudev.h            /usr/include/
install -vm644 src/libudev/*.pc                    /usr/lib/pkgconfig/
install -vm644 src/udev/*.pc                       /usr/share/pkgconfig/
install -vm644 ../src/udev/udev.conf               /etc/udev/
install -vm644 rules.d/* ../rules.d/README         /usr/lib/udev/rules.d/
install -vm644 $(find ../rules.d/*.rules \
                      -not -name '*power-switch*') /usr/lib/udev/rules.d/
install -vm644 hwdb.d/*  ../hwdb.d/{*.hwdb,README} /usr/lib/udev/hwdb.d/
install -vm755 $udev_helpers                       /usr/lib/udev
install -vm644 ../network/99-default.link          /usr/lib/udev/network

Install some custom rules and support files useful in an LFS environment:

tar -xvf ../../udev-lfs-20230818.tar.xz
make -f udev-lfs-20230818/Makefile.lfs install

Install the man pages:

tar -xf ../../systemd-man-pages-260.1.tar.xz                          \
    --no-same-owner --strip-components=1                              \
    -C /usr/share/man --wildcards '*/udev*' '*/libudev*'              \
                                  '*/systemd.link.5'                  \
                                  '*/systemd-'{hwdb,udevd.service}.8

sed 's|systemd/network|udev/network|'                                 \
    /usr/share/man/man5/systemd.link.5                                \
  > /usr/share/man/man5/udev.link.5

sed 's/systemd\(\\\?-\)/udev\1/' /usr/share/man/man8/systemd-hwdb.8   \
                               > /usr/share/man/man8/udev-hwdb.8

sed 's|lib.*udevd|sbin/udevd|'                                        \
    /usr/share/man/man8/systemd-udevd.service.8                       \
  > /usr/share/man/man8/udevd.8

rm /usr/share/man/man*/systemd*

Finally, unset the udev_helpers variable:

unset udev_helpers

8.77.2. Installation of Udev - 32-bit

Clean previous build (while still in the build directory):

rm -rf *

Prepare Udev for compilation:

LANG=en_US.UTF-8                      \
meson setup --prefix=/usr             \
            --buildtype=release       \
            --cross-file=lib32        \
            -D mode=release           \
            -D dev-kvm-mode=0660      \
            -D link-udev-shared=false \
            -D logind=false           \
            -D vconsole=false         \
            ..

Compile the package:

ninja $(grep -o -E "^build (src/libudev|src/udev)[^:]*" \
        build.ninja | awk '{ print $2 }')               \
      $(realpath libudev.so --relative-to .)

Install the package:

mkdir -pv /usr/lib32/pkgconfig
cp -av libudev.so{,*[0-9]} /usr/lib32/
cp src/libudev/libudev.pc  /usr/lib32/pkgconfig/