diff --git a/configure.ac b/configure.ac
index f14180a5e5f7..6e17ac2dab8a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6614,6 +6614,7 @@ if test "$ENABLE_JAVA" != ""; then
 fi
 
 HAVE_JAVA6=
+HAVE_JAVA9=
 dnl ===================================================================
 dnl Checks for JDK.
 dnl ===================================================================
@@ -6675,6 +6676,9 @@ you must use the "--with-jdk-home" configure option explicitly])
             if test "$_jdk_ver" -ge 10600; then
                 HAVE_JAVA6=TRUE
             fi
+            if test "$_jdk_ver" -ge 10900; then
+                HAVE_JAVA9=TRUE
+            fi
 
             AC_MSG_RESULT([checked (JDK $_jdk)])
             JAVA_HOME=`echo $JAVAINTERPRETER | $SED -n "s,//*bin//*java,,p"`
@@ -6695,13 +6699,17 @@ else
     JAVA_HOME=NO_JAVA_HOME ; export JAVA_HOME
 fi
 AC_SUBST([HAVE_JAVA6])
+AC_SUBST([HAVE_JAVA9])
 
 dnl ===================================================================
 dnl Set target Java bytecode version
 dnl ===================================================================
 if test "$ENABLE_JAVA" != ""; then
-    _java_target_ver="1.5"
-
+    if test "$HAVE_JAVA9" == "TRUE"; then
+        _java_target_ver="1.6"
+    else
+        _java_target_ver="1.5"
+    fi
     JAVA_SOURCE_VER="$_java_target_ver"
     JAVA_TARGET_VER="$_java_target_ver"
 fi
diff --git a/external/apache-commons/patches/logging.patch b/external/apache-commons/patches/logging.patch
index 953cf614768d..c225e5a30338 100644
--- a/external/apache-commons/patches/logging.patch
+++ b/external/apache-commons/patches/logging.patch
@@ -1,19 +1,19 @@
 --- misc/commons-logging-1.1.1-src/build.xml   2007-11-22 00:27:52.000000000 +0100
 +++ misc/build/commons-logging-1.1.1-src/build.xml     2008-06-24 14:23:56.316301736 +0200
-@@ -130,10 +130,10 @@
+@@ -129,12 +129,6 @@
+   
  <!-- ========== Compiler Defaults ========================================= -->
  
-   <!-- Version of java class files to generate. -->
+-  <!-- Version of java class files to generate. -->
 -  <property name="target.version" value="1.2"/>
-+  <property name="target.version" value="1.5"/>
- 
-   <!-- Version of java source to accept -->
+-
+-  <!-- Version of java source to accept -->
 -  <property name="source.version" value="1.2"/>
-+  <property name="source.version" value="1.3"/>
- 
+-
    <!-- Should Java compilations set the 'debug' compiler option? -->
    <property name="compile.debug"           value="true"/>
-@@ -283,6 +283,10 @@
+ 
+@@ -283,6 +277,10 @@
                 classpathref="compile.classpath"
                 classname="org.apache.avalon.framework.logger.Logger"/>
  
@@ -24,7 +24,18 @@
      <available file="${log4j12.jar}" property="log4j12.present"/>
      <available file="${log4j13.jar}" property="log4j13.present"/>
      <available file="${build.home}/docs" property="maven.generated.docs.present"/>
-@@ -373,6 +377,8 @@
+@@ -362,8 +360,8 @@
+            debug="${compile.debug}"
+            deprecation="${compile.deprecation}"
+            optimize="${compile.optimize}"
+-           source="${source.version}"
+-           target="${target.version}">
++           source="${ant.build.javac.source}"
++           target="${ant.build.javac.target}">
+ 
+       <classpath refid="compile.classpath"/>
+     
+@@ -373,6 +371,8 @@
                 unless="logkit.present"/>
        <exclude name="org/apache/commons/logging/impl/AvalonLogger.java"
                 unless="avalon-framework.present"/>
diff --git a/external/jfreereport/patches/common_build.patch b/external/jfreereport/patches/common_build.patch
index 2bc54595cf17..b197f494e128 100644
--- a/external/jfreereport/patches/common_build.patch
+++ b/external/jfreereport/patches/common_build.patch
@@ -1,5 +1,14 @@
 --- misc/libloader-1.1.3/common_build.xml	2009-11-16 10:25:34.000000000 +0100
 +++ misc/build/libloader-1.1.3/common_build.xml	2009-12-04 10:22:24.277647200 +0100
+@@ -136,8 +136,6 @@
+   <property name="javac.deprecation"
+             value="true"
+             description="Indicates whether source should be compiled with deprecation information" />
+-  <property name="javac.source" value="1.5" description="Provide source compatibility with specified release" />
+-  <property name="javac.target" value="1.5" description="Generate class files for specific VM version" />
+ 
+   <!-- Build Cache properties -->
+   <property name="build.cache.dir"
 @@ -261,7 +261,7 @@ TYPICAL TARGET SEQUENCE
    <property name="project.revision" value="${Implementation-Version}" description="Sets the version number of the project based on the Implementation-Version found in the manifest file (if one is supplied and nothing is specified in the build.properties)" />
    <fail message="A project revision number has not been determined!">
@@ -27,7 +36,7 @@
      <if>
        <istrue value="${release}" />
        <then>
-@@ -1061,6 +1061,11 @@
+@@ -1061,12 +1061,17 @@
  	    Performs the actual compile
  	    ====================================================================-->
    <target name="compile.compile" depends="init">
@@ -39,6 +48,14 @@
      <javac destdir="${classes.dir}"
             debug="${javac.debug}"
             deprecation="${javac.deprecation}"
+            fork="true"
+-           source="${javac.source}"
+-           target="${javac.target}">
++           source="${ant.build.javac.source}"
++           target="${ant.build.javac.target}">
+       <classpath>
+         <path refid="classpath" />
+       </classpath>
 @@ -1082,27 +1087,32 @@
  	    duplicate copying of resources from src tree (handled by compile.src_copy
  	    if jar.include.source is set.