Linux From Scratch - Version r13.0-27-systemd

Chapter 8. Installing Basic System Software

8.66. GRUB-2.14

The GRUB package contains the GRand Unified Bootloader.

[Note]

Note

This page is split up into multiple sections aimed to install for a specific boot method (BIOS, 64-bit UEFI, and 32-bit UEFI). You may skip other sections to go to the boot method you need. If in doubt, you may follow all of the sections at the cost of extra build time. After you have installed support for your boot method, then continue building the rest of the packages in this chapter. Making your LFS system bootable with GRUB will be discussed in Section 10.4, “Using GRUB to Set Up the Boot Process.”

[Warning]

Warning

Unset any environment variables which may affect the build: 

unset {C,CPP,CXX,LD}FLAGS

Don't try “tuning” this package with custom compilation flags. This package is a bootloader. The low-level operations in the source code may be broken by aggressive optimization.

Approximate build time: 0.3 SBU
Required disk space: 202 MB

8.66.1. Installation of GRUB for BIOS

First fix a bug introduced in grub-2.14: 

sed 's/--image-base/--nonexist-linker-option/' -i configure

Prepare GRUB for compilation: 

./configure --prefix=/usr     \
            --sysconfdir=/etc \
            --disable-efiemu  \
            --disable-werror

The meaning of the new configure options:

--disable-werror

This allows the build to complete with warnings introduced by more recent versions of Flex.

--disable-efiemu

This option minimizes what is built by disabling a feature and eliminating some test programs not needed for LFS.

Compile the package: 

make

The test suite for this packages is not recommended. Most of the tests depend on packages that are not available in the limited LFS environment. To run the tests anyway, run make check.

Install the package: 

make install

8.66.2. Installation of GRUB for 64-bit UEFI

If you want to boot with 64-bit UEFI, you should build support for it.

First, if you built GRUB from any of the sections above, clean the source tree: 

make clean

Fix a bug introduced in grub-2.14: 

sed 's/--image-base/--nonexist-linker-option/' -i configure

Now build GRUB with 64-bit UEFI support: 

./configure --prefix=/usr       \
            --sysconfdir=/etc   \
            --target=x86_64     \
            --with-platform=efi \
            --disable-efiemu    \
            --disable-werror

Compile the package again: 

make

Install support for 64-bit UEFI: 

make install

8.66.3. Installation of GRUB for 32-bit UEFI

If you want to boot with 32-bit UEFI, which is very rare, you should build support for it.

First, if you built GRUB from any of the sections above, clean the source tree: 

make clean

Fix a bug introduced in grub-2.14: 

sed 's/--image-base/--nonexist-linker-option/' -i configure

Now build GRUB with 32-bit UEFI support: 

./configure --prefix=/usr       \
            --sysconfdir=/etc   \
            --target=i386       \
            --with-platform=efi \
            --disable-efiemu    \
            --disable-werror

Compile the package again: 

make

Install support for 32-bit UEFI: 

make install

8.66.4. Contents of GRUB

Installed programs: grub-bios-setup, grub-editenv, grub-file, grub-fstest, grub-glue-efi, grub-install, grub-kbdcomp, grub-macbless, grub-menulst2cfg, grub-mkconfig, grub-mkimage, grub-mklayout, grub-mknetdir, grub-mkpasswd-pbkdf2, grub-mkrelpath, grub-mkrescue, grub-mkstandalone, grub-ofpathname, grub-probe, grub-reboot, grub-render-label, grub-script-check, grub-set-default, grub-sparc64-setup, and grub-syslinux2cfg
Installed directories: /usr/lib/grub, /etc/grub.d, /usr/share/grub, and /boot/grub (when grub-install is first run)

Short Descriptions

grub-bios-setup

Is a helper program for grub-install

grub-editenv

Is a tool to edit the environment block

grub-file

Checks to see if the given file is of the specified type

grub-fstest

Is a tool to debug the file system driver

grub-glue-efi

Glues 32-bit and 64-bit binaries into a single file (for Apple machines)

grub-install

Installs GRUB on your drive

grub-kbdcomp

Is a script that converts an xkb layout into one recognized by GRUB

grub-macbless

Is the Mac-style bless for HFS or HFS+ file systems (bless is peculiar to Apple machines; it makes a device bootable)

grub-menulst2cfg

Converts a GRUB Legacy menu.lst into a grub.cfg for use with GRUB 2

grub-mkconfig

Generates a grub.cfg file

grub-mkimage

Makes a bootable image of GRUB

grub-mklayout

Generates a GRUB keyboard layout file

grub-mknetdir

Prepares a GRUB netboot directory

grub-mkpasswd-pbkdf2

Generates an encrypted PBKDF2 password for use in the boot menu

grub-mkrelpath

Makes a system pathname relative to its root

grub-mkrescue

Makes a bootable image of GRUB suitable for a floppy disk, CDROM/DVD, or a USB drive

grub-mkstandalone

Generates a standalone image

grub-ofpathname

Is a helper program that prints the path to a GRUB device

grub-probe

Probes device information for a given path or device

grub-reboot

Sets the default boot entry for GRUB for the next boot only

grub-render-label

Renders Apple .disk_label for Apple Macs

grub-script-check

Checks the GRUB configuration script for syntax errors

grub-set-default

Sets the default boot entry for GRUB

grub-sparc64-setup

Is a helper program for grub-setup

grub-syslinux2cfg

Transforms a syslinux config file into grub.cfg format