GENERIC_TINY build failure

Hi,

when trying to build the i386 GENERIC_TINY kernel I see following error:

# make
...
#      link  GENERIC_TINY/netbsd
ld -Map netbsd.map --cref -T netbsd.ldscript -Ttext c0100000 -e start -X -o netbsd ${SYSTEM_OBJ:[@]:Nswapnetbsd.o} ${EXTRA_OBJ} vers.o swapnetbsd.o
efi.o: In function `efi_probe':
efi.c:(.text+0x475): undefined reference to `pci_mapreg_map_enable_decode'

(I am following the steps as outlined at
https://www.netbsd.org/docs/guide/en/chap-kernel.html#chap-kernel-building-manually
with the unmodified GENERIC_TINY configuration.)

The kernel code is from the NetBSD 8.0 security/critical branch as of today.

Any ideas?

Thanks!

Best regards,
Ingo