Maybe visit the forum at mflenses.com? The forum members would have information on compatibility and on adapters needed. For Canon bodies, you will need a functional auto aperture stop-down or if not present, a physical aperture ring. Only some Canon FD mount lenses can be adapted to Canon EF mount - the other FD lenses won't reach infinity.
Don't overlook incompatible-mount lenses that can be used with an adapter. M42 screw mount lenses will fit on Canon EF/EF-S mount via an adapter. I have a number of legacy manual focus, manual aperture lenses sitting in my closet, and plan to test them using cheap e-bay adapters.
If you want to buy inexpensive new manual lenses, try Samyang/ Rokinon/ Bower lenses (all made by Samyang, all identical). I have the 14mm f/2.8, and it is a fun, good quality lens for a bargain price.