A general comment also regarding the `eval-after-load' blocks.  If I
were you, I'll pull all this extra support into additional files that
require cursor-undo and the packages you wish to support.  And instead
of the `eval-after-load' blocks, you could just scan the current
directory for all "cursor-undo-[...].el" files and call
`eval-after-load', requiring "cursor-undo-[...]".  That should clear a
number of the byte-compiler warnings.  It would also be nice if you
could tackle the checkdoc warnings as well.

> Cursor-undo allows you to undo cursor movement commands using the Emacs
> standard `undo' command.
>
> For frequent cursor movements such as up/down/left/right, it
> combines the movements of the same direction into a single undo entry.
> This prevents the undo command from reversing each individual
> character movement separately.  For example, if you move the cursor 20
> characters to the right and then 10 lines up, the first undo will go
> down 10 lines back, and the next undo move back 20 characters left.
> On the other hand, for search commands that often jump across multiple
> pages, each search command has its own undo entry, allowing you to
> undo them one at a time rather than as a combined operation.
>
> This cursor-undo functionality has existed in my local Emacs init file
> for over 11+ years, since version 0 on 2013-06-26.  It was originally
> intended to support my Brief Editor Mode only, but I later found it
> would be more useful if implemented in a more generalized way.  For
> years I have hoped for an official implementation of this feature,
> which is commonly seen among various editors.  Considering my
> implementation using advice functions a bit inelegant so I have always
> hesitated to release it till recently.
>
> Until there is official support for the cursor undo feature, this
> package serves most common daily needs.  The core design is to align
> with Emacs's native `undo' function by recording cursor positions
> and screen-relative position undo entries in the `buffer-undo-list'
> in accordance with its documentation.
>
> As this package primarily consists of advice functions to wrap cursor
> movement commands, each cursor movement command needs to be manually
> wrapped with `def-cursor-undo'.  For interactive functions that
> heavily invoke advised cursor movement commands, you may even need to
> advise them with `disable-cursor-tracking' to prevent generating
> numerous distinct cursor undo entries from a single command.  For user
> convenience, we have prepared ready `def-cursor-undo' advice sets for
> standard Emacs cursor movement commands, Brief Editor mode, Viper
> mode, and EVIL mode.
>
> Usage:
>
>   In theory, once this package is installed, you should already have
>   cursor-undo autoloaded and enabled.  If not, or if you downloaded this
>   package as source, put "cursor-undo.el" file in a `load-path' and add
>   the following line into your Emacs init file .emacs or init.el:
>
>     (require 'cursor-undo)
>
> Notes for EVIL mode user:
>
>   If you choose to use default Emacs `undo' system, you should be able
>   to use `evil-undo' to undo cursor movements.  If your choice is
>   tree-undo or another undo system, you might need to use Emacs default
>   `undo' (C-_, C-/ or C-x u ...) to undo cursor movements.
>
> Notes for Viper mode user:
>
>   The default `viper-undo' is advised to allow cursor-undo.  If you
>   find the advised function not working properly, consider comment out
>   the following source code `(define-advice viper-undo ...' to restore
>   the original `viper-undo' function and use Emacs default `undo'
>   (C-_, C-/ or C-x u ...) to undo cursor movements.

-- 
	Philip Kaludercic on peregrine