The problem is that *you* linked to a version of libstdc++ that doesn't exist on those versions of Mac OS X. You need to use weak linking to link to libstdc++, or link to a specific old vesion of libstdc++.
TurboActivate works on Mac OS X 10.5 and newer. And you'll see that if you use the dynamic version of TurboActivate. Also, the requirements for TurboActivate are listed here: http://wyday.com/limelm/help/using-turboactivate/#requirements