Thank you. I did see the reply to you about the SDK but couldn't get it to work in my context. I will pursue as per your reply. Hard to understand why simple things that work have to be made more difficult.

I tried the above but the LD command failed with various unknown options -nouuid noehlabels platform version - and I set the arch to x86_64. Then the response was -lSystem not found as in my own attempts previously. Not sure why my version of LD differs from yours and still fails.

I love irony, as a retired public service person how could I not, but I love solutions that work better. Thanks, Eskimo. Clang wins.