The following #defines's are used in xmfm:

DEBUG			define this if you want general debug code activated
DEBUG_MENU		define thie if you want to debug just the menu system
DEBUG_FILE		define this to debug the file menu subsystem
DEBUG_SIGNAL		signal debugging
RDD			define this to enable Rogers Drag and Drop.
MOTIF_DD		Motif 1.2 Drag and Drop. Kills the speed of
			directory refreshes.
SIZE_KLUDGE		Bugs in RowCol may need this. Set it if funny
			sizes on buttons
ALLOW_ROWCOL_RESIZE	1.1.0 RowCol doesn't resize children properly,
			1.2.1 does. Don't know about the other versions.
			Set this to allow number of columns of files to
			change when xmfm is resized
OLD_PATTERN		redundant code
FILENAME_IS_EDITABLE	allow select and type over of file names in selections
			doesn't work under 1.1.0. don't know about others.
ALLOW_EDITRES		Should allow editres stuff to be linked in and show
			widget tree (untested)
NO_REGEXP		no regexp finctions
NO_DIRENT		no dirent.h file