Then there's the build dependencies of all the libraries. And of the compilers. It's quite possible a complete list would go all the way back to the original Un

Then there's the build dependencies of all the libraries. And of the compilers. It's quite possible a complete list would go all the way back to the original Unix or CP/M, passing through multiple architectures along the way. The tool you want can't exist in the world we have, I think. Projects like http://bootstrappable.org http://bootstrappable.org might help get us there.