XCode 4.5.x / Audio Units / OSX 10.5.8

So a while ago I updated to xcode 4.5.x.
I have juce standalone apps working -compiled with the 10.5/10.6/10.8 base SDK- and they work fine in OSX 10.5.8!

Now I’m trying to get an AU to compile and:

Compilation with 10.5 SDK fails, no matter what I try.
Compilation with 10.7 SDK works, but then the plugin crashes at validation in 10.5.8 (“symbol not found _ZNSo9_M_insertIlEERSoT”)

Has anyone ever been able to compile audio units in XCode 4.5.x that validate on 10.5.8?

  • bram