How building sys/boot

Hi All,

Somebody can explain to me how build sys/boot?
Right now I doing:
 make -C sys/boot obj depend all
And I get:
 cc  -O2 -pipe   -DSKEIN_LOOP=111 -fPIC -I/usr/src/sys/boot/efi/loader -I/usr/src/sys/boot/efi/loader/arch/amd64 -I/usr/src/sys/boot/efi/loader/../include -I/usr/src/sys/boot/efi/loader/../include/amd64 -I/usr/src/sys/boot/efi/loader/../../../contrib/dev/acpica/include -I/usr/src/sys/boot/efi/loader/../../.. -I/usr/src/sys/boot/efi/loader/../../i386/libi386 -I/usr/src/sys/boot/efi/loader/../../zfs -I/usr/src/sys/boot/efi/loader/../../../cddl/boot/zfs -I/usr/src/sys/boot/efi/loader/../../../crypto/skein -DEFI_ZFS_BOOT -DNO_PCI -DEFI -DSMBIOS_SERIAL_NUMBERS -DBOOT_FORTH -I/usr/src/sys/boot/efi/loader/../../ficl -I/usr/src/sys/boot/efi/loader/../../ficl/amd64 -DLOADER_DISK_SUPPORT -DLOADER_GPT_SUPPORT -DLOADER_MBR_SUPPORT -fPIC -I/usr/src/sys/boot/ficl -I/usr/src/sys/boot/ficl/amd64  -I/usr/src/sys/boot/ficl/../common -I/usr/src/sys/boot/efi/loader/../../common -ffreestanding -Wformat -msoft-float -mno-mmx -mno-sse -mno-avx -fshort-wchar -mno-red-zone -mno-aes -g -MD  -MF.depend.zfs.o -MTzfs.o -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-uninitialized -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef -Wno-sign-compare -Wno-array-bounds -Wno-missing-prototypes -Qunused-arguments  -c /usr/src/sys/boot/efi/loader/../../zfs/zfs.c -o zfs.o
/usr/src/sys/boot/efi/loader/../../zfs/zfs.c:602:17: error: incompatible pointer types initializing 'int (*)(void *, int, daddr_t, size_t, size_t, char *, size_t *)' (aka 'int
      (*)(void *, int, long, unsigned long, unsigned long, char *, unsigned long *)') with an expression of type 'int (void *, int, daddr_t, size_t, char *, size_t *)' (aka 'int
      (void *, int, long, unsigned long, char *, unsigned long *)') [-Werror,-Wincompatible-pointer-types]
        .dv_strategy = zfs_dev_strategy,
                       ^~~~~~~~~~~~~~~~
/usr/src/sys/boot/efi/loader/../../zfs/zfs.c:606:14: error: incompatible pointer types initializing 'void (*)(int)' with an expression of type 'int (int)'
      [-Werror,-Wincompatible-pointer-types]
        .dv_print = zfs_dev_print,
                    ^~~~~~~~~~~~~
2 errors generated.
*** Error code 1

Stop.
make[2]: stopped in /usr/src/sys/boot/efi/loader
*** Error code 1


-- 
With Best Regards,
Ilya A. Arkhipov