Prebuilt GNU8 - AArch64 GNU/Linux target (aarch64-linux-gnu)

Hi,

I have downloaded the new AArch64 GNU/Linux target (aarch64-linux-gnu) binaries and they are working fine.

Can someone please let me know the the configurations flags used to build these toolchains.

Earlier I have used ABE tool (from Linaro) to build the toolchain. 

Do we still need to use the same ABE tool to build locally? or do we have any scripts to build them?

Thanks in Advance,

Nagaraju