some question about aarch32 for ARM64

[loody]

hi all:
I follow below instructions to compile a simple c file as aarch32 but in vain.

https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/AArch64-Options.html#AArch64-Options

And I download the toolchain from
http://www.linaro.org/downloads/
(linaro-toolchain-binaries 4.9 (Aarch64 little-endian))

I saw there are aarch32 support in arm64 kernel porting.
Would you mind to let us know how to get aarch32 ELF for running on
ARM64 processors?

Sincerely appreciate your kind help in advance,

PS:Below is my compile error message:
#aarch64-linux-gnu-gcc -mabi=ilp32 test.c
/media/sdb2/toolchain/arm/gcc-
linaro-aarch64-linux-gnu-4.9-2014.09_linux/bin/../lib/gcc/aarch64-linux-gnu/4.9.2/../../../../aarch64-linux-gnu/bin/ld:
skipping incompatible
/media/sdb2/toolchain/arm/gcc-linaro-aarch64-linux-gnu-4.9-2014.09_linux/bin/../lib/gcc/aarch64-linux-gnu/4.9.2/libgcc.a
when searching for -lgcc





-- 
Regards,
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