On Sun, 10 Mar 2019 14:14:52 -0500, Kent West<we...@acu.edu> wrote: >Example: https://packages.debian.org/sid/python3-kivy > >- >> >> dep: python3 <https://packages.debian.org/sid/python3> (<< 3.7) dep: >> python3 <https://packages.debian.org/sid/python3> (>= 3.5~) > > >The ">=" surely means "greater than or equal to", but what is "<<"? >"less than or less than"? > >Even more interesting is that "aptitude install python3-kivy" only >shows one "<" (which makes sense to me as "less than"): > >The following packages have unmet dependencies: >> python3-kivy : Depends: python3 (< 3.7) but 3.7.2-1 is installed >> > >and in the description of the package in the aptitude console: > >Depends: python3-gst-1.0, python3 (< 3.7), python3 (>= 3.5~), ... >> > >It's not a typo, unless other pages have similar typos (sometimes being >">>" - "greater than or greater than"?). > >Also, is the answer documented somewhere? I've researched >unproductively for several hours. >
Hi! It's documented in Debian policy: https://www.debian.org/doc/debian-policy/ch-relationships.html >The relations allowed are <<, <=, =, >= and >> for strictly earlier, >earlier or equal, exactly equal, later or equal and strictly later, >respectively. >The relations < and > were previously allowed, but they were >confusingly defined to mean earlier/later or equal rather than >strictly earlier/later. dpkg still supports them with a warning, but >they are no longer allowed by Debian Policy. -- Andreas Rönnquist mailingli...@gusnan.se andr...@ronnquist.net
