grub-glue-efi

grub-glue-efi output.efi input1.efi [input2.efi ...]

output.efi
    The name of the output EFI file to be created.

input1.efi [input2.efi ...]
    One or more input EFI files to be glued together into the output file.

The `grub-glue-efi` command is a utility used to combine multiple EFI binaries into a single, bootable image. It's primarily used when building GRUB for EFI systems, particularly when dealing with module dependencies or when a single, unified EFI application is required. This can be necessary because EFI environments often have limitations on the number and types of files that can be directly loaded. `grub-glue-efi` resolves these issues by creating a self-contained boot image that incorporates all necessary components, like GRUB modules, fonts, and configuration files. This allows the system to boot directly into GRUB without relying on multiple EFI load operations. The result is typically a `.efi` file ready to be installed into the EFI system partition (ESP). It simplifies the boot process and makes deployment easier, especially in automated build environments or when distributing bootable media.

The primary use case for `grub-glue-efi` is within the build process of GRUB itself, specifically during the creation of bootable EFI images. Users rarely need to run this command directly. It's typically invoked by build scripts or Makefiles.

The command operates on EFI binaries. It may not function correctly with other types of executables. Ensure that all input files are valid EFI images.
The order of input files *may* be significant depending on the contents of the files, especially if code initialization or dependencies are involved. Consult GRUB documentation for best practices.

grub-mkimage(1), grub-install(1)