iproute2: missing dynamic symbols in Android (ICS)

I'm working with Android and would like to use ip utility. Support for
this utility was added some time ago and Android provides  2.6.35
version of iproute2.

The problem I have is that symbols from ip/iplink_can.c,
ip/iplink_vlan.c etc. are missing in the final binary. I also get
following compiler warnings:

target thumb C: ip <= external/iproute2/ip/iplink_can.c
prebuilt/linux-x86/ccache/ccache
prebuilt/linux-x86/toolchain/arm-linux-androideabi-4.4.x/bin/arm-linux-androideabi-gcc
-I bionic/libc/kernel/common -I bionic/libc/kernel/arch-arm -I
external/iproute2/include -I external/iproute2/ip -I
out/target/product/beagleboard/obj/EXECUTABLES/ip_intermediates -I
dalvik/libnativehelper/include/nativehelper -isystem
system/core/include -isystem hardware/libhardware/include -isystem
hardware/libhardware_legacy/include -isystem hardware/ril/include
-isystem dalvik/libnativehelper/include -isystem
frameworks/base/include -isystem frameworks/base/opengl/include
-isystem frameworks/base/native/include -isystem external/skia/include
-isystem out/target/product/beagleboard/obj/include -isystem
bionic/libc/arch-arm/include -isystem bionic/libc/include -isystem
bionic/libstdc++/include -isystem bionic/libm/include -isystem
bionic/libm/include/arm -isystem bionic/libthread_db/include -c
-fno-exceptions -Wno-multichar -msoft-float -fpic -ffunction-sections
-fdata-sections -funwind-tables -fstack-protector -Wa,--noexecstack
-Werror=format-security -fno-short-enums -march=armv7-a
-mfloat-abi=softfp -mfpu=neon -include
system/core/include/arch/linux-arm/AndroidConfig.h -I
system/core/include/arch/linux-arm/ -Wno-psabi -mthumb-interwork
-DANDROID -fmessage-length=0 -W -Wall -Wno-unused -Winit-self
-Wpointer-arith -Werror=return-type -Werror=non-virtual-dtor
-Werror=address -Werror=sequence-point -DNDEBUG -g -Wstrict-aliasing=2
-fgcse-after-reload -frerun-cse-after-loop -frename-registers -DNDEBUG
-UDEBUG -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing  -O2 -g
-W -Wall      -MD -o
out/target/product/beagleboard/obj/EXECUTABLES/ip_intermediates/iplink_can.o
external/iproute2/ip/iplink_can.c
external/iproute2/ip/iplink_can.c: In function 'can_parse_opt':
external/iproute2/ip/iplink_can.c:97: warning: unused parameter 'lu'
external/iproute2/ip/iplink_can.c: In function 'can_print_opt':
external/iproute2/ip/iplink_can.c:196: warning: unused parameter 'lu'
external/iproute2/ip/iplink_can.c: In function 'can_print_xstats':
external/iproute2/ip/iplink_can.c:260: warning: unused parameter 'lu'

This is how ip-/Android.mk looks like:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_SRC_FILES := ip.c ipaddress.c ipaddrlabel.c iproute.c iprule.c   \
        rtm_map.c iptunnel.c ip6tunnel.c tunnel.c ipneigh.c ipntable.c \
        iplink.c ipmaddr.c ipmonitor.c ipmroute.c ipprefix.c ipxfrm.c  \
        xfrm_state.c xfrm_policy.c xfrm_monitor.c iplink_vlan.c        \
        link_veth.c link_gre.c iplink_can.c iptuntap.c

LOCAL_MODULE := ip

LOCAL_MODULE_TAGS := optional

LOCAL_SHARED_LIBRARIES := libc libm libdl

LOCAL_SHARED_LIBRARIES += libiprouteutil libnetlink

LOCAL_C_INCLUDES := $(KERNEL_HEADERS) external/iproute2/include

LOCAL_CFLAGS := -O2 -g -W -Wall

include $(BUILD_EXECUTABLE)

I tried to get help from Android Community but none answered:
https://groups.google.com/d/topic/android-building/yjV4iYnT1Zc/discussion

Any idea how can I solve this problem?

Best regards,
Yegor