Ok, that's something I was unaware of. Makes me tempted to get a system setup to do a real test of it then. I had assumed that since the static libc is a copy

Ok, that's something I was unaware of. Makes me tempted to get a system setup to do a real test of it then. I had assumed that since the static libc is a copy of the object files going in that it would be able to do the LTO even at that stage. I don't think I want to play with getting my system built for doing LTO like that and risking instability on my main machine.