Support to build armhf/arm64 platforms on arm based system (#7731)

Why I did it
Support to build armhf/arm64 platforms on arm based system without qemu simulator.
When building the armhf/arm64 on arm based system, it is not necessary to use qemu simulator.

How I did it
Build armhf on armhf system, or build arm64 on arm64 system, by default, qemu simulator will not be used.
When building armhf on arm64, and you have enabled armhf docker, then it will build images without simulator automatically. It is based how the docker service is run.

Docker base image change:
For amd64, change from debian:to amd64/debian:
For arm64, change from multiarch/debian-debootstrap:arm64- to arm64v8/debian:
For armhf, change from multiarch/debian-debootstrap:armhf- to arm32v7/debian:
See https://github.com/docker-library/official-images#architectures-other-than-amd64
The mapping relations:
arm32v6 --- armel
arm32v7 --- armhf
arm64v8 --- arm64

Docker image armhf deprecated info: https://hub.docker.com/r/armhf/debian, using arm32v7 instead.

Makefile.work

@@ -47,12 +47,13 @@ SHELL = /bin/bash
 USER := $(shell id -un)
 PWD := $(shell pwd)
 USER_LC := $(shell echo $(USER) | tr A-Z a-z)
+DOCKER_MACHINE := $(shell docker run --rm debian:buster uname -m)
 
 comma := ,
 
-ifeq ($(shell uname -m), aarch64)
+ifeq ($(DOCKER_MACHINE), aarch64)
 COMPILE_HOST_ARCH := arm64
-else ifeq ($(shell uname -m), armv7l)
+else ifeq ($(shell echo $(DOCKER_MACHINE) | grep -qE "armv7l|armv8l" && echo y),y)
 COMPILE_HOST_ARCH := armhf
 else
 COMPILE_HOST_ARCH := amd64
@@ -286,7 +287,7 @@ SONIC_BUILD_INSTRUCTION :=  make \
 .DEFAULT_GOAL :=  all
 
 %::
-ifneq (,$(filter $(CONFIGURED_ARCH), armhf arm64))
+ifeq ($(MULTIARCH_QEMU_ENVIRON), y)
 	@$(DOCKER_MULTIARCH_CHECK)
 ifneq ($(BLDENV), )
 	@$(DOCKER_SERVICE_MULTIARCH_CHECK)
@@ -361,7 +362,7 @@ reset :
 	    if [ $$ans == y ]; then
 	        echo "Resetting local repository. Please wait...";
 	        $(DOCKER_RUN) $(SLAVE_IMAGE):$(SLAVE_TAG) sudo rm -rf fsroot;
-	        if [[ "$(CONFIGURED_ARCH)" == "armhf" || "$(CONFIGURED_ARCH)" ==  "arm64" ]]; then
+	        if [ "$(MULTIARCH_QEMU_ENVIRON)" == y ] && [[ "$(CONFIGURED_ARCH)" == "armhf" || "$(CONFIGURED_ARCH)" ==  "arm64" ]]; then
 	            echo "Stopping march $(CONFIGURED_ARCH) docker"
 	            sudo kill -9 `sudo cat /var/run/march/docker.pid` || true
 	            sudo rm -f /var/run/march/docker.pid || true

dockers/docker-base-buster/Dockerfile.j2

@@ -4,7 +4,7 @@ FROM multiarch/debian-debootstrap:armhf-buster
 {% elif CONFIGURED_ARCH == "arm64" and MULTIARCH_QEMU_ENVIRON == "y" %}
 FROM multiarch/debian-debootstrap:arm64-buster
 {% else %}
-FROM debian:buster
+FROM {{DOCKER_BASE_ARCH}}/debian:buster
 {% endif %}
 
 # Clean documentation in FROM image

dockers/docker-base-stretch/Dockerfile.j2

@@ -4,7 +4,7 @@ FROM multiarch/debian-debootstrap:armhf-stretch
 {% elif CONFIGURED_ARCH == "arm64" and MULTIARCH_QEMU_ENVIRON == "y" %}
 FROM multiarch/debian-debootstrap:arm64-stretch
 {% else %}
-FROM debian:stretch
+FROM {{DOCKER_BASE_ARCH}}/debian:stretch
 {% endif %}
 
 # Clean documentation in FROM image

dockers/docker-base/Dockerfile.j2

@@ -3,7 +3,7 @@ FROM multiarch/debian-debootstrap:armhf-jessie
 {% elif CONFIGURED_ARCH == "arm64" and MULTIARCH_QEMU_ENVIRON == "y" %}
 FROM multiarch/debian-debootstrap:arm64-jessie
 {% else %}
-FROM debian:jessie
+FROM {{DOCKER_BASE_ARCH}}/debian:jessie
 {% endif %}
 
 ## Remove retired jessie-updates repo

slave.mk

@@ -51,6 +51,14 @@ CONFIGURED_ARCH := $(shell [ -f .arch ] && cat .arch || echo amd64)
 ifeq ($(PLATFORM_ARCH),)
 	override PLATFORM_ARCH = $(CONFIGURED_ARCH)
 endif
+DOCKER_BASE_ARCH := $(CONFIGURED_ARCH)
+ifeq ($(CONFIGURED_ARCH),armhf)
+	override DOCKER_BASE_ARCH = arm32v7
+else
+ifeq ($(CONFIGURED_ARCH),arm64)
+	override DOCKER_BASE_ARCH = arm64v8
+endif
+endif
 ifeq ($(BLDENV),bullseye)
 IMAGE_DISTRO := bullseye
 else
@@ -68,6 +76,7 @@ export PYTHON_WHEELS_PATH
 export IMAGE_DISTRO
 export IMAGE_DISTRO_DEBS_PATH
 export MULTIARCH_QEMU_ENVIRON
+export DOCKER_BASE_ARCH
 
 ###############################################################################
 ## Utility rules