Thanks for responses, Alex, OK, let's say we (which is probably me...) will find a way to reduce the Linux SDK to the compiler and the necessary utilities, and then, perhaps try to port some / what will appear to be more feasible so it works on Linux. There are other things like the player versions (Linux version is already 2 minor versions behind the official release and by the time of the next Flex release, Flex will not support any player that works on Linux, or the other way around, depending on how you look at it).
I was looking at LightSpark, http://lightspark.github.com/ which seems to be actively worked on, but the project is still raw. I have successfully installed it on FC 17 amd64 and will soon try it on Linux Mint 13 amd64. I don't know yet how much it is different from Adobe player, but, if Linux is considered, then, perhaps, it would make more sense to align with this player. All of which in the end means a whole lot of changes to the existing building procedure... I'm not suggesting anything, just thinking aloud. Best. Oleg