buildtools: feat #135: Check the version of QEMU ahead

os/scripts/qemu-ver-check.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# Argument1: The filename of qemu executable, e.g. qemu-system-riscv64
+QEMU_PATH=$(which $1)
+RET=$?
+MINIMUM_MAJOR_VERSION=7
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+if [ $RET != 0 ]
+then
+    echo "$1 not found"
+    exit 1
+else
+    QEMU_VERSION=$($1 --version|head -n 1|awk '{print $4}')
+    MAJOR_VERSION=$(echo $QEMU_VERSION|cut -c1-1)
+    if [ $MAJOR_VERSION -lt $MINIMUM_MAJOR_VERSION ]
+    then
+        echo "${RED}Error: Required major version of QEMU is ${MINIMUM_MAJOR_VERSION}, " \
+             "but current is ${QEMU_VERSION}.${NC}"
+        exit 1
+    else
+        echo "${GREEN}QEMU version is ${QEMU_VERSION}(>=${MINIMUM_MAJOR_VERSION}), OK!${NC}"
+        exit 0
+    fi
+fi