Re: new image library "requirements"

[Richard Stallman]

    > jpeg: used for displaying jpeg image files
    > tiff: used for displaying tiff image files
    > xpm: used for displaying xpm image files and color icons
    > alsa: used for playing sounds from within Emacs

    Either that (we already do something similar for X toolkits and such
    likes), or display a warning at startup (or both).

Don't do that -- it would be a change for the worse.
An error message is the right thing when a crucial feature
that ought to work would fail due to missing headers.