USE_SELINUX
If set to 'true', udev will be built with SELinux support
enabled. This is disabled by default.
- USE_KLIBC
- If set to 'true', udev is built and linked against klibc.
- Default value is 'false'. KLCC specifies the klibc compiler
- wrapper, usually located at /usr/bin/klcc.
EXTRAS
list of helper programs in extras/ to build.
make EXTRAS="extras/cdrom_id extras/scsi_id extras/volume_id"