Add Linux and Windows cross-build

Jenkinsfile

@@ -1,28 +1,51 @@
 pipeline {
     agent any
 
+    options {
+        timestamps()
+        buildDiscarder(logRotator(numToKeepStr: '10'))
+    }
+
     stages {
-        stage('Build') {
+        stage('Build Linux') {
             steps {
                 sh '''
-                    echo "Building project..."
-                    mkdir -p build
-                    g++ main.cpp -o build/test_app
+                    mkdir -p build/linux
+                    g++ main.cpp -o build/linux/test_app
                 '''
             }
         }
 
-        stage('Run') {
+        stage('Build Windows') {
             steps {
                 sh '''
-                    ./build/test_app
+                    mkdir -p build/windows
+                    x86_64-w64-mingw32-g++ main.cpp -o build/windows/test_app.exe
+                '''
+            }
+        }
+
+        stage('Run Linux') {
+            steps {
+                sh '''
+                    ./build/linux/test_app
+                '''
+            }
+        }
+
+        stage('Package') {
+            steps {
+                sh '''
+                    cd build
+                    tar -czf linux-build.tar.gz linux
+                    zip -r windows-build.zip windows
                 '''
             }
         }
 
         stage('Archive') {
             steps {
-                archiveArtifacts artifacts: 'build/**', fingerprint: true
+                archiveArtifacts artifacts: 'build/linux-build.tar.gz, build/windows-build.zip', fingerprint: true
             }
         }
     }