How would one go about adding fl.controls.* to AS3 projects developed under Linux?
Apparently it is not part of Flex 3SDK for Linux (which is what I am using to compile) or maybe it is and I am not importing it correctly..I downloaded this SDK last March, maybe time for update?
Looking at Adobe Official Docs for fl.controls does not mention that this library is somehow restricted.
In particular, I was looking for fl.controls.UIScrollBar type of functionality
I am using MiniBuilder to edit.
Packages starting with fl.* are part of (and only available in) the Flash authoring tool (Adobe CS3/4) and cannot be imported to Flex projects. Check this answer
You can use MiniBuilder to work with fl.* components. You only need to get the library, which is not part of Flex SDK but it comes with Flash CS. You can run the trial Flash CS version (using a Windows virtual machine or asking a Windows user friend) and get the library from it. See this video for details http://www.youtube.com/watch?v=GoYJYjfG_Vc
But be aware of the license. Flash CS components are part of Flash. I guess you must have a license to create commercial products with those components. It's not the case for home/private use, though.