Fix target JVM version in scala build

project/SparkBuild.scala

@@ -33,6 +33,10 @@ object SparkBuild extends Build {
   // HBase version; set as appropriate.
   val HBASE_VERSION = "0.94.6"
 
+  // Target JVM version
+  val SCALAC_JVM_VERSION = "jvm-1.5"
+  val JAVAC_JVM_VERSION = "1.5"
+
   lazy val root = Project("root", file("."), settings = rootSettings) aggregate(allProjects: _*)
 
   lazy val core = Project("core", file("core"), settings = coreSettings)
@@ -77,7 +81,9 @@ object SparkBuild extends Build {
     organization := "org.apache.spark",
     version := "0.8.0-SNAPSHOT",
     scalaVersion := "2.9.3",
-    scalacOptions := Seq("-unchecked", "-optimize", "-deprecation"),
+    scalacOptions := Seq("-unchecked", "-optimize", "-deprecation", 
+      "-target:" + SCALAC_JVM_VERSION),
+    javacOptions := Seq("-target", JAVAC_JVM_VERSION, "-source", JAVAC_JVM_VERSION),
     unmanagedJars in Compile <<= baseDirectory map { base => (base / "lib" ** "*.jar").classpath },
     retrieveManaged := true,
     retrievePattern := "[type]s/[artifact](-[revision])(-[classifier]).[ext]",