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Gcc compiler/toochain for ARMv8 ?

In open source which is gcc cross toolchian available which can support AARCH32 and AARCH64 based on –mabi flag ?

In gcc documentation, supported values for –mabi are ilp32 and lp64. But when I tried linaro released toolchain crosstool-NG linaro-1.13.1-4.8-2014.02 - Linaro GCC 2014.02 (gcc 4.8.3) , it does not support these options, by default it generates code for aarch64.

Also I need information on -mfloat-abi, -mfu, what are correct values for these options in aarch64?

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