jsr@Barn:~/rtlinux/linux-4.19.1$ sudo make install
Makefile:960: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"
sh ./arch/x86/boot/install.sh 4.19.1-rt3 arch/x86/boot/bzImage \
	System.map "/boot"
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.19.1-rt3 /boot/vmlinuz-4.19.1-rt3
run-parts: executing /etc/kernel/postinst.d/dkms 4.19.1-rt3 /boot/vmlinuz-4.19.1-rt3
 * dkms: running auto installation service for kernel 4.19.1-rt3         [ OK ] 
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.19.1-rt3 /boot/vmlinuz-4.19.1-rt3
update-initramfs: Generating /boot/initrd.img-4.19.1-rt3
I: The initramfs will attempt to resume from /dev/dm-1
I: (/dev/mapper/mint--vg-swap_1)
I: Set the RESUME variable to override this.