Check with the true GNAT creator and maintainers. Adacore.com Any GNAT version older than GNAT 3.15 such as GNAT 3.15p must be under GPL 2 or 3. And that means GNAT Ada 2005 is GPL 2 or 3. If the Debain maintainer has change this or is allowing an illegal version to exist the Debain maintainers may be in some legal hot water. In , Ivan Levashew writes: >anon пишет: >> All programs that are compiled with GNU components are force to GPL 2 >> or 3. >I'm sure Debain distribution enjoys GMGPL version of RTL. > >-- >If you want to get to the top, you have to start at the bottom