RPi3 Kernel Fails to Build

[Monty Chaney-Geib]

I'm getting an error trying to build the kernel on hardware. What do you
guys recommend I do? There is the error:

MAKE="make" sh /usr/src/sys/conf/newvers.sh  GENERIC
cc -target aarch64-unknown-freebsd12.0 --sysroot=/usr/obj/usr/src/tmp
-B/usr/obj/usr/src/tmp/usr/bin -c -O -pipe  -g -nostdinc  -I.
-I/usr/src/sys -I/usr/src/sys/contrib/libfdt -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -fno-omit-frame-pointer
-mno-omit-leaf-frame-pointer  -mgeneral-regs-only -ffixed-x18
-ffreestanding -fwrapv -fstack-protector -gdwarf-2 -Wall -Wredundant-decls
-Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
-Winline -Wcast-qual -Wundef -Wno-pointer-sign
-D__printf__=__freebsd_kprintf__ -Wmissing-include-dirs
-fdiagnostics-show-option -Wno-unknown-pragmas
-Wno-error-tautological-compare -Wno-error-empty-body
-Wno-error-parentheses-equality -Wno-error-unused-function
-Wno-error-pointer-sign -Wno-error-shift-negative-value
-std=iso9899:1999 -Werror  vers.c
ctfconvert -L VERSION -g vers.o
linking kernel.full
unknown emulation: aarch64elf
line 19: : expected, but got (
  PROVIDE (etext = .);
          ^
*** Error code 1

Stop.
make[2]: stopped in /usr/obj/usr/src/sys/GENERIC
*** Error code 1

Stop.
make[1]: stopped in /usr/src
*** Error code 1

Stop.
make: stopped in /usr/src