build dependency range

Hi, I have a package (cpl) that in the past did build-depend from libcfitsio3-dev, but now depends on libcfitsio-dev. I want to keep the dependency from libcfitsio3-dev for easier backports. The minimal version needed by cpl is 3.310. The transition between libcfitsio-dev and libcfitsio3-dev

Re: build dependency range

The valid way to specify libcfitsio-dev (= 3.310) or libcfitsio3-dev (= 3.310, 3.370) would be to use A|(BC) = (A|B)(A|C): libcfitsio-dev (= 3.310) | libcfitsio3-dev (= 3.310), libcfitsio-dev (= 3.310) | libcfitsio3-dev ( 3.370) but you probably don't actually need that: as libcfitsio3-dev