diff --git a/build.xml b/build.xml
--- a/build.xml
+++ b/build.xml
@@ -2,6 +2,11 @@
 <!-- You may freely edit this file. See commented blocks below for -->
 <!-- some examples of how to customize the build. -->
 <!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
 <project name="jna-posix" default="default" basedir=".">
     <description>Builds, tests, and runs the project jna-posix.</description>
     <import file="nbproject/build-impl.xml"/>
diff --git a/nbproject/build-impl.xml b/nbproject/build-impl.xml
--- a/nbproject/build-impl.xml
+++ b/nbproject/build-impl.xml
@@ -218,13 +218,13 @@
             </sequential>
         </macrodef>
     </target>
-    <target name="-init-macrodef-nbjpda">
+    <target depends="-init-debug-args" name="-init-macrodef-nbjpda">
         <macrodef name="nbjpdastart" uri="http://www.netbeans.org/ns/j2se-project/1">
             <attribute default="${main.class}" name="name"/>
             <attribute default="${debug.classpath}" name="classpath"/>
             <attribute default="" name="stopclassname"/>
             <sequential>
-                <nbjpdastart addressproperty="jpda.address" name="@{name}" stopclassname="@{stopclassname}" transport="dt_socket">
+                <nbjpdastart addressproperty="jpda.address" name="@{name}" stopclassname="@{stopclassname}" transport="${debug-transport}">
                     <classpath>
                         <path path="@{classpath}"/>
                     </classpath>
@@ -255,6 +255,12 @@
         <condition else="-Xdebug" property="debug-args-line" value="-Xdebug -Xnoagent -Djava.compiler=none">
             <istrue value="${have-jdk-older-than-1.4}"/>
         </condition>
+        <condition else="dt_socket" property="debug-transport-by-os" value="dt_shmem">
+            <os family="windows"/>
+        </condition>
+        <condition else="${debug-transport-by-os}" property="debug-transport" value="${debug.transport}">
+            <isset property="debug.transport"/>
+        </condition>
     </target>
     <target depends="-init-debug-args" name="-init-macrodef-debug">
         <macrodef name="debug" uri="http://www.netbeans.org/ns/j2se-project/3">
@@ -264,7 +270,7 @@
             <sequential>
                 <java classname="@{classname}" dir="${work.dir}" fork="true">
                     <jvmarg line="${debug-args-line}"/>
-                    <jvmarg value="-Xrunjdwp:transport=dt_socket,address=${jpda.address}"/>
+                    <jvmarg value="-Xrunjdwp:transport=${debug-transport},address=${jpda.address}"/>
                     <jvmarg line="${run.jvmargs}"/>
                     <classpath>
                         <path path="@{classpath}"/>
@@ -311,6 +317,13 @@
                 ===================
             -->
     <target depends="init" name="deps-jar" unless="no.deps"/>
+    <target depends="init,-check-automatic-build,-clean-after-automatic-build" name="-verify-automatic-build"/>
+    <target depends="init" name="-check-automatic-build">
+        <available file="${build.classes.dir}/.netbeans_automatic_build" property="netbeans.automatic.build"/>
+    </target>
+    <target depends="init" if="netbeans.automatic.build" name="-clean-after-automatic-build">
+        <antcall target="clean"/>
+    </target>
     <target depends="init,deps-jar" name="-pre-pre-compile">
         <mkdir dir="${build.classes.dir}"/>
     </target>
@@ -331,7 +344,7 @@
         <!-- Empty placeholder for easier customization. -->
         <!-- You can override this target in the ../build.xml file. -->
     </target>
-    <target depends="init,deps-jar,-pre-pre-compile,-pre-compile,-do-compile,-post-compile" description="Compile project." name="compile"/>
+    <target depends="init,deps-jar,-verify-automatic-build,-pre-pre-compile,-pre-compile,-do-compile,-post-compile" description="Compile project." name="compile"/>
     <target name="-pre-compile-single">
         <!-- Empty placeholder for easier customization. -->
         <!-- You can override this target in the ../build.xml file. -->
@@ -345,7 +358,7 @@
         <!-- Empty placeholder for easier customization. -->
         <!-- You can override this target in the ../build.xml file. -->
     </target>
-    <target depends="init,deps-jar,-pre-pre-compile,-pre-compile-single,-do-compile-single,-post-compile-single" name="compile-single"/>
+    <target depends="init,deps-jar,-verify-automatic-build,-pre-pre-compile,-pre-compile-single,-do-compile-single,-post-compile-single" name="compile-single"/>
     <!--
                 ====================
                 JAR BUILDING SECTION
diff --git a/nbproject/genfiles.properties b/nbproject/genfiles.properties
--- a/nbproject/genfiles.properties
+++ b/nbproject/genfiles.properties
@@ -1,8 +1,8 @@
 build.xml.data.CRC32=ff132349
-build.xml.script.CRC32=03cd8af7
-build.xml.stylesheet.CRC32=be360661
+build.xml.script.CRC32=41f25e8c
+build.xml.stylesheet.CRC32=958a1d3e
 # This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
 # Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
 nbproject/build-impl.xml.data.CRC32=ff132349
-nbproject/build-impl.xml.script.CRC32=424c9197
-nbproject/build-impl.xml.stylesheet.CRC32=487672f9
+nbproject/build-impl.xml.script.CRC32=8599d9fd
+nbproject/build-impl.xml.stylesheet.CRC32=e55b27f5
diff --git a/src/org/jruby/ext/posix/BaseNativePOSIX.java b/src/org/jruby/ext/posix/BaseNativePOSIX.java
--- a/src/org/jruby/ext/posix/BaseNativePOSIX.java
+++ b/src/org/jruby/ext/posix/BaseNativePOSIX.java
@@ -8,6 +8,7 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
+import org.jruby.ext.posix.util.Platform;
 
 public abstract class BaseNativePOSIX implements POSIX {
     protected String libraryName;
@@ -236,7 +237,11 @@
     }
 
     public boolean isatty(FileDescriptor fd) {
-       return libc.isatty(helper.getfd(fd)) != 0;
+        return libc.isatty(helper.getfd(fd)) != 0;
+    }
+    
+    public int lseek(int fd, int size, int whence) {
+        return libc.lseek(fd, size, whence);
     }
 
     public abstract FileStat allocateStat();
diff --git a/src/org/jruby/ext/posix/JavaPOSIX.java b/src/org/jruby/ext/posix/JavaPOSIX.java
--- a/src/org/jruby/ext/posix/JavaPOSIX.java
+++ b/src/org/jruby/ext/posix/JavaPOSIX.java
@@ -244,6 +244,14 @@
         return unimplementedInt("setpriority");
     }
 
+    public int lseek(int fd, int size, int whence) {
+        return unimplementedInt("lseek");
+    }
+
+    public int getfd(FileDescriptor descriptor) {
+        return helper.getfd(descriptor);
+    }
+
     private int unimplementedInt(String message) {
         handler.unimplementedError(message);
         
diff --git a/src/org/jruby/ext/posix/LibC.java b/src/org/jruby/ext/posix/LibC.java
--- a/src/org/jruby/ext/posix/LibC.java
+++ b/src/org/jruby/ext/posix/LibC.java
@@ -83,4 +83,5 @@
     public int getpriority(int which, int who);
     public int setpriority(int which, int who, int prio);
     public int isatty(int fd);
+    public int lseek(int fd, int size, int whence);
 }
diff --git a/src/org/jruby/ext/posix/POSIX.java b/src/org/jruby/ext/posix/POSIX.java
--- a/src/org/jruby/ext/posix/POSIX.java
+++ b/src/org/jruby/ext/posix/POSIX.java
@@ -57,4 +57,6 @@
     public int utimes(String path, long[] atimeval, long[] mtimeval);
     public int waitpid(int pid, int[] status, int flags);
     public int wait(int[] status);
+    public int lseek(int fd, int size, int whence);
+    public int getfd(FileDescriptor fileDescriptor);
 }