gt7-void

Here's one way to have gcc print what `-march=native` is equivalent to: ``` $ cc -march=native -### -E - < /dev/null 2>&1 | grep cc1 /usr/lib64/gcc/x86_64-unknown-linux-gnu/10.2.1/cc1 -E -quiet - "-march=nehalem"...

More info: I had forgotten that a few months ago I had tested btrfs in this server. I think I erased everything but apparently the disk still "looks like" a...