Hi linuxophile
Ehrm, your name doesn’t really suggest you’re on OSX
?
The intention of the wiki is to provide information for compilation from A-Z on OSX, SimGear, FlightGear and all dependencies (almost, ALUT excluded i.e., but there is a binary provided). When you follow the wiki you can just pull source later again by git pull, and recompile. When you use precompiled OSG binaries you will stay on "latest stable". Sometimes there are changes in recent SimGear/FlightGear GIT you will also need latest OSG. And you can also be sure that the compiler flags are the same from A-Z, sometimes depending on your machine/osx/configuration. I took latest OSG version 3.1.0 (GIT repository on GitHub) and not development version 3.0.1 stable or SVN trunk.
I never run into this issue on OSX, but to be honest I didn’t (re-)compile the last weeks. I will have a try the next days myself and will have a look if this is a general problem to point out also for OSX.
Can you provide the errors you get during OSG compilation, configuration included ? This would be interesting for me, to help to solve your problem, but also to improve the wiki when necessary. Sometimes OSG won’t compile because of other non-default-linux-like installations on OSX (i.e. will fail because of Libraries/Frameworks used for scenery tools).
Cheers, gral