grub-mkrelpath makes a file system path relative to
the root of its containing file system. For instance, if /usr is a
mount point, then:
$ grub-mkrelpath /usr/share/grub/unicode.pf2 ‘/share/grub/unicode.pf2’
This is mainly used internally by other GRUB utilities such as
grub-mkconfig (see Invoking grub-mkconfig), but may
occasionally also be useful for debugging.
grub-mkrelpath accepts the following options:
Print a summary of the command-line options and exit.
Print the version number of GRUB and exit.