bash: better support for building under Apple Silicon aarch64/arm64

- turns out `$(uname -m)` can return `arm64` as well as `aarch64`

Signed-off-by: Ricardo Pardini <ricardo@pardini.net>

Author: rpardini

bash/kernel.sh

@@ -121,7 +121,7 @@ function get_kernel_info_dict() {
 	# convert ARCH (x86_64, aarch64) to docker-ARCH (amd64, arm64)
 	case "${kernel_info['ARCH']}" in
 		"x86_64") kernel_info['DOCKER_ARCH']="amd64" ;;
-		"aarch64") kernel_info['DOCKER_ARCH']="arm64" ;;
+		"aarch64" | "arm64") kernel_info['DOCKER_ARCH']="arm64" ;;
 		*) log error "ARCH ${kernel_info['ARCH']} not supported" && exit 1 ;;
 	esac
 }
@@ -139,7 +139,7 @@ function get_host_docker_arch() {
 	# convert ARCH (x86_64, aarch64) to docker-ARCH (amd64, arm64)
 	case "$(uname -m)" in
 		"x86_64") host_docker_arch="amd64" ;;
-		"aarch64") host_docker_arch="arm64" ;;
+		"aarch64" | "arm64") host_docker_arch="arm64" ;;
 		*) log error "ARCH $(uname -m) not supported" && exit 1 ;;
 	esac
 	return 0

bash/kernel/kernel_armbian.sh

@@ -50,7 +50,7 @@ function calculate_kernel_version_armbian() {
 	declare oras_arch="unknown"
 	case "$(uname -m)" in
 		"x86_64") oras_arch="amd64" ;;
-		"aarch64") oras_arch="arm64" ;;
+		"aarch64" | "arm64") oras_arch="arm64" ;;
 		*) log error "ERROR: ARCH $(uname -m) not supported by ORAS? check https://github.com/oras-project/oras/releases" && exit 1 ;;
 	esac
 	declare oras_down_url="https://github.com/oras-project/oras/releases/download/v${oras_version}/oras_${oras_version}_linux_${oras_arch}.tar.gz"

bash/kernel/kernel_default.sh

@@ -36,7 +36,7 @@ function calculate_kernel_version_default() {
 			KERNEL_CROSS_COMPILE="x86_64-linux-gnu-"
 			KERNEL_OUTPUT_IMAGE="arch/x86_64/boot/bzImage"
 			;;
-		"aarch64")
+		"aarch64" | "arm64")
 			KERNEL_ARCH="arm64"
 			KERNEL_CROSS_COMPILE_PKGS="crossbuild-essential-arm64"
 			KERNEL_CROSS_COMPILE="aarch64-linux-gnu-"

bash/linuxkit.sh

@@ -10,7 +10,7 @@ function obtain_linuxkit_binary_cached() {
 	# determine the arch to download from current arch
 	case "$(uname -m)" in
 		"x86_64") linuxkit_arch="amd64" ;;
-		"aarch64") linuxkit_arch="arm64" ;;
+		"aarch64" | "arm64") linuxkit_arch="arm64" ;;
 		*) log error "ERROR: ARCH $(uname -m) not supported by linuxkit? check https://github.com/linuxkit/linuxkit/releases" && exit 1 ;;
 	esac