find_package(foo 2.0 EXACT) means EXACT, i.e. only "2.0" is allowed. In most cases this behavior is not the one that one would expect or need. Most people would instead allow any 2.0.x version to match. This sort of selection is currently impossible without additional effort in every Find*.cmake that is used.
I came over this when I tried converting FindLua5[01].cmake to use FindLua.cmake, but I can't do "find_package(Lua 5.0 EXACT)" in there because e.g. 5.0.1 would not be accepted then, and I neither can do "find_package(Lua 5.0)" because that may return e.g. 5.2 instead. Since we can't change this because of the usual backward compatibility concerns I think we should introduce a new version mode, e.g. EXACT_OR_MINOR (or any other naming you find more appropiate). In case this is aggreed on I would try to create a patch ASAP to be able to still land it in 3.1. Opinions? Eike
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