That issue actually only gives me a warning, but following that warning I get a number of Link errors, starting with these:
Undefined symbols for architecture x86_64:
“typeinfo for Steinberg::FDynLibrary”, referenced from:
typeinfo for Steinberg::VST3DynLibrary in libauwrapper.a(auwrapper.o)
“Steinberg::String::assign(char const*, int, bool)”, referenced from:
CopyProcessPath(Steinberg::String&) in libauwrapper.a(auwrapper.o)
“Steinberg::FDynLibrary::FDynLibrary(char16_t const*, bool)”, referenced from:
Steinberg::VST3DynLibrary::VST3DynLibrary() in libauwrapper.a(auwrapper.o)
“vtable for Steinberg::ConstString”, referenced from:
Steinberg::ConstString::~ConstString() in libauwrapper.a(auwrapper.o)
NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
“Steinberg::ConstString::copyTo(char16_t*, unsigned int, int) const”, referenced from:
Steinberg::Vst::AUHostApplication::getName(char16_t*) in libauwrapper.a(auwrapper.o)
I’m not sure what is missing, but perhaps that missing config file is related? The paths that I see in the build logs are correct as far as I can tell, and I am able to include the auwrapper library that I built (in that path, which is also correctly specified in the build settings).