Introduction to Udev Extras
In 2012, the Udev code
distribution was merged with systemd. Systemd is a set of programs that replace the
SysVInit package used by LFS and
is much more complex. It is not compatible with the LFS bootscripts
and has many problems and few advantages for most LFS users.
The procedures below extract libraries and programs from the
systemd sources that could not be built in LFS due to library
dependency issues.
Unlike any other package in the BLFS book, there is no set version
of systemd specified to download.
Several version updates to LFS and BLFS means there are probably
many different versions of Udev on
the platforms that BLFS is being built upon. Therefore, you should
download and use the version of systemd your computer currently uses. The BLFS
team has no experience updating (or reverting to an older version)
the Udev programs
“on the fly.” To discover
the version of Udev your computer
currently uses, issue /sbin/udevadm
--version.
This package is known to build and work properly using an LFS-7.5
platform.
Package Information
Udev Extras Dependencies
Required
http://anduin.linuxfromscratch.org/sources/other/
(match the udev-lfs-???.tar.bz2 tarball version to the systemd
version used in LFS). GLib-2.38.2 (for the gudev library), Gperf-3.0.4 (for
keymap), and gobject-introspection-1.38.0
(for gir-data, needed for Gnome)
Optional
acl-2.2.52
Optional Runtime Dependencies
pciutils-3.2.1 and usbutils-007
User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/udev-extras
Installation of Udev Extras
First, put the custom LFS files in place:
UDEV=<version>
tar -xf ../udev-lfs-$UDEV.tar.bz2
![[Note]](../images/note.png)
Note
For udev-lfs-197-2.tar.bz2, there is a minor error in the
Makefile. For that version, run:
sed -i -e '/samsung-9/d' udev-lfs-197-2/makefile-incl.keymap
keymap
Note
Starting with systemd-206, the keymap capabilities are built
into the udev procedures initial installation in LFS. These
procedures only apply to udev versions before 206.
Support for special keys for many laptops is provided by the
keymap program and
supporting files. If the keymap capability is desired,
use:
make -f udev-lfs-$UDEV/Makefile.lfs keymap
To install keymap
and its associated files, issue the following command as the
root user:
make -f udev-lfs-$UDEV/Makefile.lfs install-keymap
gudev
To build the libgudev-1.0
library and interface files, run:
make -f udev-lfs-$UDEV/Makefile.lfs gudev
Install the gudev library, run, as
the root user:
make -f udev-lfs-$UDEV/Makefile.lfs install-gudev
GObject Files
To build the gobject-introspection interface (gir) files
for the libgudev-1.0 library, run:
make -f udev-lfs-$UDEV/Makefile.lfs gir-data
Install the gir data, as the root
user:
make -f udev-lfs-$UDEV/Makefile.lfs install-gir-data
![[Caution]](../images/caution.png)
Caution
There is a shortcut to build and install all of the
udev components at once using
the all and install-all Makefile.lfs targets. The installation of
this target will overwrite the base LFS udev files and has not
been thoroughly tested at the time of this writing. If using
this procedure, the udev daemon should be stopped before
overwriting the existing udevd
and udev libraries.
Contents
A list of the installed files, along with their short descriptions
can be found at ../../../../lfs/view/7.5/chapter06/udev.html#contents-udev.
The following is some additional content information.
Installed Programs:
findkeyboards, keyboard-force-release.sh,
and keymap
Installed Library:
libgudev-1.0.so
Installed Directories:
/lib/udev/keymaps/force-release,
/usr/include/gudev-1.0/gudev, /usr/lib/girepository-1.0,
/usr/share/gir-1.0, and /usr/share/gtk-doc/html/gudev
Short Descriptions
|
keymap
|
configures computer model specific key mappings.
|
|
libgudev-1.0.so
|
is a GObject-based wrapper library for libudev.
|