arch:arm64: add support for nuttx arm64 Toolchain Selection
Summary:
1. to enable Toolchain select Kconfig option, making something depend on
the opton to be configured with menuconfig
if ARCH_ARM64
comment "ARM64 Options"
+choice
+ prompt "ARM64 Toolchain Selection"
+ default ARM64_TOOLCHAIN_GNU_EABI
+
+config ARM64_TOOLCHAIN_GNU_EABI
+ bool "Generic GNU EABI toolchain"
+ select ARCH_TOOLCHAIN_GNU
+ ---help---
+ This option should work for any modern GNU toolchain (GCC 4.5 or newer)
+
+config ARM64_TOOLCHAIN_CLANG
+ bool "LLVM Clang toolchain"
+ select ARCH_TOOLCHAIN_CLANG
+
+endchoice
+
choice
prompt "ARM64 chip selection"
default ARCH_CHIP_QEMU
