try this please (needs buildx)

Author: henderkes

bin/spc-gnu-docker

@@ -31,12 +31,20 @@ current)
     if [ "$BASE_ARCH" = "arm64" ]; then
         BASE_ARCH=aarch64
     fi
+    PLATFORM_ARG=""
     ;;
 aarch64)
     BASE_ARCH=aarch64
+    PLATFORM_ARG="--platform=linux/arm64"
     # shellcheck disable=SC2039
     echo -e "\e[033m* Using different arch needs to setup qemu-static for docker !\e[0m"
     $DOCKER_EXECUTABLE run --rm --privileged multiarch/qemu-user-static:register --reset > /dev/null
+    if ! $DOCKER_EXECUTABLE buildx inspect cwcc-spc-gnu-$SPC_USE_ARCH-builder >/dev/null 2>&1; then
+        $DOCKER_EXECUTABLE buildx create --use --name cwcc-spc-gnu-$SPC_USE_ARCH-builder
+        $DOCKER_EXECUTABLE buildx inspect --bootstrap
+    else
+        $DOCKER_EXECUTABLE buildx use cwcc-spc-gnu-$SPC_USE_ARCH-builder
+    fi
     ;;
 *)
     echo "Current arch is not supported to run in docker: $SPC_USE_ARCH"
@@ -47,7 +55,7 @@ esac
 # Detect docker env is setup
 if ! $DOCKER_EXECUTABLE images | grep -q cwcc-spc-gnu-$SPC_USE_ARCH; then
     echo "Docker container does not exist. Building docker image ..."
-    $DOCKER_EXECUTABLE build -t cwcc-spc-gnu-$SPC_USE_ARCH -f- . <<EOF
+    $DOCKER_EXECUTABLE buildx build $PLATFORM_ARG -t cwcc-spc-gnu-$SPC_USE_ARCH -f- . <<EOF
 FROM centos:7
 RUN sed -i 's/mirror.centos.org/vault.centos.org/g' /etc/yum.repos.d/*.repo && \
     sed -i 's/^#.*baseurl=http/baseurl=http/g' /etc/yum.repos.d/*.repo && \