[Xenomai] Error while compiling I-pipe for exynos4210

*H**ey I am trying to compile i-pipe core 3.2 for exynos 4210 board.When I
try to compile the code , this is what happens
**
ksh <at> ubuntu:~/xenomai$ cd ipipe
ksh <at> ubuntu:~/xenomai/ipipe$ make ARCH=arm exynos4_defconfig
 HOSTCC  scripts/basic/fixdep
 HOSTCC  scripts/kconfig/conf.o
 SHIPPED scripts/kconfig/zconf.tab.c
 SHIPPED scripts/kconfig/zconf.lex.c
 SHIPPED scripts/kconfig/zconf.hash.c
 HOSTCC  scripts/kconfig/zconf.tab.o
 HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#
ksh <at> ubuntu:~/xenomai/ipipe$ make ARCH=arm CROSS_COMPILE=arm-none-eabi-
scripts/kconfig/conf --silentoldconfig Kconfig
 WRAP    arch/arm/include/generated/asm/auxvec.h
 WRAP    arch/arm/include/generated/asm/bitsperlong.h
 WRAP    arch/arm/include/generated/asm/cputime.h
 WRAP    arch/arm/include/generated/asm/emergency-restart.h
 WRAP    arch/arm/include/generated/asm/errn

<some wrap and cc stuff>

arch/arm/kernel/return_address.c:62:2: warning: #warning "TODO:
return_address should use unwind tables" [-Wcpp]
 CC      arch/arm/kernel/setup.o
 CC      arch/arm/kernel/signal.o
 CC      arch/arm/kernel/sys_arm.o