Zirconium Cross Linux From Scratch - AArch64 Version r1.0-wip-systemd

Chapter 9. System Configuration

9.32. efivar-39

9.32.1. Introduction to efivar

The efivar package provides tools and libraries to manipulate EFI variables.

Approximate build time: less than 0.1 SBU
Required disk space: 21 MB

efivar Dependencies

Optional

mandoc (for the man page of efisecdb)

9.32.2. Installation of efivar

[Note]

Note

This package cannot function properly on a 32-bit system with a 64-bit UEFI implementation. Don't install this package (or efibootmgr) on 32-bit system unless you are absolutely sure you have a 32-bit UEFI implementation, which is very rare in practice.

Build efivar with the following commands: 

make ENABLE_DOCS=0

The test suite of this package is dangerous. Running it may trigger firmware bugs and make your system unusable without using some special hardware to reprogram the firmware.

Now Install the package and manpages, issue: 

make install ENABLE_DOCS=0 LIBDIR=/usr/lib

install -vm644 docs/efivar.1 /usr/share/man/man1
install -vm644 docs/*.3      /usr/share/man/man3

To avoid a hard dependency on mandoc we used ENABLE_DOCS=0, but it causes all the man pages skipped from the installation even though most of them actually do not need mandoc.

9.32.3. Command Explanations

ENABLE_DOCS=0: Disable the generation of man pages, in order to allow building this package without mandoc installed.

LIBDIR=/usr/lib: This option overrides the default library directory of the package (/usr/lib64, which is not used by LFS).

9.32.4. Contents

Installed Programs: efisecdb and efivar
Installed Libraries: libefiboot.so, libefisec.so, and libefivar.so
Installed Directories: /usr/include/efivar

Short Descriptions

efisecdb

is a utility for managing UEFI signature lists

efivar

is a tool to manipulate UEFI variables

libefiboot.so

is a library used by efibootmgr

libefisec.so

is a library for managing UEFI signature lists

libefivar.so

is a library for the manipulation of EFI variables