The GRUB package provides GRand Unified Bootloader. In this page it will be built with UEFI support, which is not enabled for GRUB built in LFS.
![[Note]](../images/note.png)
Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.
Download (HTTP): https://ftpmirror.gnu.org/grub/grub-2.14.tar.xz
Download MD5 sum: 383f9effad01c235d2535357ff717543
Download size: 7.4 MB
Estimated disk space required: 176 MB (with optional dependencies and download)
Estimated build time: 1.0 SBU
Optional Unicode font data for the GRUB menu (only useful if FreeType is installed)
Download (HTTP): https://unifoundry.com/pub/unifont/unifont-17.0.01/font-builds/unifont-17.0.01.pcf.gz
Download MD5 sum: c3fbc239da0fb49a9afc9b141f606ad4
Download size: 1.3 MB
efibootmgr-18 (runtime)
FreeType-2.14.1, Fuse-3.18.1, and LVM2-2.03.38
If you are building GRUB for a 32-bit LFS system to boot it on a
64-bit UEFI firmware, rebuild GCC-15.2.0 with the
--enable-targets=all switch
appended to the ../configure command.
First, install font data as the root user if you've downloaded it and you've
installed the optional dependency FreeType-2.14.1:
mkdir -pv /usr/share/fonts/unifont && zcat ../unifont-17.0.01.pcf.gz > /usr/share/fonts/unifont/unifont.pcf
![[Warning]](../images/warning.png)
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, with low-level operations in the source code which is likely to be broken by some aggressive optimizations.
Build GRUB with the following commands:
./configure --prefix=/usr \
--sysconfdir=/etc \
--disable-efiemu \
--with-platform=efi \
--target=x86_64 \
--disable-werror &&
make
This package does not have a test suite providing meaningful results.
Now, if you've skipped the LFS GRUB package, as the root user install GRUB and skip the remaining
instructions in this section:
make install && mv -v /etc/bash_completion.d/grub /usr/share/bash-completion/completions
If you've not skipped LFS GRUB package, as the root user, only install the components not
installed from the LFS GRUB package instead:
make -C grub-core install
If you've installed the optional font data and FreeType-2.14.1, install the grub-mkfont program and the font data files (without the font data files GRUB can still function normally, but the boot menu will be displayed using a coarse font or in a smaller region on the screen).
install -vm755 grub-mkfont /usr/bin/ && install -vm644 ascii.h widthspec.h *.pf2 /usr/share/grub/
If both Fuse-3.18.1 and LVM2-2.03.38 are installed, also install the grub-mount program:
install -vm755 grub-mount /usr/bin/
--with-platform=efi:
Ensures building GRUB with EFI enabled.
--target=x86_64: Ensures
building GRUB for x86_64 even if building on a 32-bit LFS system.
Most EFI firmware on x86_64 does not support 32-bit bootloaders.
--target=i386: A few 32-bit x86
platforms have EFI support. And, some x86_64 platforms have a
32-bit EFI implementation, but they are very old and rare. Use this
instead of --target=x86_64
if you are absolutely
sure that LFS is running on such a system.
Using GRUB to make the LFS system bootable on UEFI platform will be discussed in Using GRUB to Set Up the Boot Process with UEFI.
A list of the installed files, along with their short descriptions can be found at https://www.linuxfromscratch.org/~zeckma/openrc/lfs/development/chapter08/grub.html#contents-gRUB.
Listed below are the newly installed programs along with short descriptions.