Support aarch64 architecture

[jserv]

AOSP already provides extensive aarch64 architecture. However, olibc build system lacks of the proper support yet.

[jserv]

I attempted to add preliminary aarch64 support against bionic:

--- a/Config.in
+++ b/Config.in
@@ -26,8 +26,14 @@ config TARGET_CPU_SMP
        default y

 if TARGET_arm
+config ARCH_ARM_ARMV8
+       bool "ARMv8-A 64-bit architecture (AArch64)"
+       default n
+       select ARCH_ARM_HAVE_NEON
+
 config TARGET_ARCH
        string
+       default "aarch64" if ARCH_ARM_ARMV8=y
        default "arm"

 choice

However, olibc fails to build likely because of the absence of bionic/libc/arch-aarch64.
@kito-cheng Any idea about the merge?

[kito-cheng]

It's still merge in progress since there is lots change for support 64-bit and most change need merge by manual.

[kito-cheng]

There is series patch for support AArch64,
b6c8a3b
olibc/olibc@c50f6e1
...
And https://github.com/olibc/olibc, https://github.com/olibc/build/ is already sync with upstream now
However seem there is some now totally work now, it's still work in progress :)