[beagleboard] Mkimage issue


I building kernel image for Beagle board. after make uImage i am getting these log and uImage is not building, how to set the path for mkimage?
[root@INETFI-LINUX-MC4 2.6_kernel]# make uImage
CHK include/linux/version.h
make[1]: `include/asm-arm/mach-types.h’ is up to date.
CHK include/linux/utsrelease.h
CALL scripts/checksyscalls.sh
:91:1: warning: “__IGNORE_sync_file_range” redefined
In file included from :2:
include/asm/unistd.h:444:1: warning: this is the location of the previous definition
:1097:2: warning: #warning syscall fadvise64 not implemented
:1265:2: warning: #warning syscall migrate_pages not implemented
:1321:2: warning: #warning syscall pselect6 not implemented
:1325:2: warning: #warning syscall ppoll not implemented
:1365:2: warning: #warning syscall epoll_pwait not implemented
CHK include/linux/compile.h
MODPOST vmlinux
WARNING: arch/arm/plat-omap/built-in.o(.data+0x9dc): Section mismatch: reference to .init.text:omap_timer_init (between ‘omap_timer’ and ‘omap2_current_tvstandard’)
Kernel: arch/arm/boot/Image is ready
Kernel: arch/arm/boot/zImage is ready
UIMAGE arch/arm/boot/uImage
“mkimage” command not found - U-Boot images will not be built
Image arch/arm/boot/uImage is ready

where is your mkimage utility? make sure it's on your path.