That's again due to incompetence and not a fault of RPM. My own spec files build cleanly across both without any additional effort. It's not rocket science but insight.
Absolutely correct. Those who do not understand the hardware on the register and machine code level should go master that first before dabbling with C.
One has to learn to walk before one attempts to run. Working on and with computers requires competence and insight; no technology can replace that nor ameliorate it.
