### die zu bauenden Kernel festlegen in /etc/src.conf
# KERNCONF=MYKERNEL GENERIC

include                 GENERIC

ident                   MYKERNEL

nooptions               DDB                     # Enable the ddb(4) kernel debugger
device                  nullfs
device                  nvram
#
device                  speaker
envvar                  hint.speaker.0.at="isa"
envvar                  hint.speaker.0.port="0x61"
device                  isa
#nodevice               isa                     # Don't need to support an ISA bus
#
device                  zfs
device                  sg
nooptions               cxgbe                   # Chelsio T4-T6 1/10/25/40/100 Gigabit Ethernet

### IPv6 - mit "no" davor wird abgeschaltet
options                 INET6                   # IPv6 communications protocols
device                  gif                     # IPv6 and IPv4 tunneling

### oder in der /etc/src.conf mit der Variablen WITHOUT_MODULES abschalten
### WITHOUT_MODULES=    amr arcmsr ciss iir ips mly twa smartpqi tws aac aacraid ida mfi mlx mrsas twe agp cbb pccard cardbus wlan wlan_wep wlan_ccmp wlan_tkip wlan_amrr an ath ath_pci ath_hal bwi bwn ipw iwi iwn malo mwl ral wpi virtio hyperv
#
options                 COMPAT_FREEBSD32        # Compatible with i386 binaries
nooptions               COMPAT_FREEBSD4         # Compatible with FreeBSD4
nooptions               COMPAT_FREEBSD5         # Compatible with FreeBSD5
nooptions               COMPAT_FREEBSD6         # Compatible with FreeBSD6
nooptions               COMPAT_FREEBSD7         # Compatible with FreeBSD7
nooptions               COMPAT_FREEBSD9         # Compatible with FreeBSD9
nooptions               COMPAT_FREEBSD10        # Compatible with FreeBSD10
options                 COMPAT_FREEBSD11        # Compatible with FreeBSD11
options                 COMPAT_FREEBSD12        # Compatible with FreeBSD12