出错内容：
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/../lib/gcc/arm-eabi/4.4.3/../../../../arm-eabi/bin/ld: out/target/product/cooperve/obj/EXECUTABLES/recovery_intermediates/ui.o: in function code_convert:bootable/recovery/ui.c:1006: error: undefined reference to 'iconv_open'
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/../lib/gcc/arm-eabi/4.4.3/../../../../arm-eabi/bin/ld: out/target/product/cooperve/obj/EXECUTABLES/recovery_intermediates/ui.o: in function code_convert:bootable/recovery/ui.c:1009: error: undefined reference to 'iconv'
prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/../lib/gcc/arm-eabi/4.4.3/../../../../arm-eabi/bin/ld: out/target/product/cooperve/obj/EXECUTABLES/recovery_intermediates/ui.o: in function code_convert:bootable/recovery/ui.c:1010: error: undefined reference to 'iconv_close'
说明：iconv.h文件已经包含。