C++ does not compile

[kaarlo52]

I managed to compile SDK_53.30.lha with adtools (new didn t compile)

C language compiles.
C++ gives lots of errors like:

ppc-amigaos/lib/libstdc++.a(locale.o):
undefined reference to `__gthread_active_p'

ppc-amigaos-cpp.exe
ppc-amigaos-c++.exe

[3246251196]

You have to provide

athread=native

To you final link step.