diff --git a/tools/dicttool/Android.mk b/tools/dicttool/Android.mk
index 895e4a2..95afb4c 100644
--- a/tools/dicttool/Android.mk
+++ b/tools/dicttool/Android.mk
@@ -27,11 +27,28 @@
 LATINIME_ANNOTATIONS_SOURCE_DIRECTORY := $(LATINIME_BASE_SOURCE_DIRECTORY)/annotations
 LATINIME_CORE_SOURCE_DIRECTORY := $(LATINIME_BASE_SOURCE_DIRECTORY)/latin
 MAKEDICT_CORE_SOURCE_DIRECTORY := $(LATINIME_CORE_SOURCE_DIRECTORY)/makedict
+
+# Dependencies for Dicttool. Most of these files are needed by BinaryDictionary.java. Note that
+# a significant part of the dependencies are mocked in the compat/ directory, with empty or
+# nearly-empty implementations, for parts that we don't use in Dicttool.
 USED_TARGETTED_UTILS := \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/BinaryDictionary.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/DicTraverseSession.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/Dictionary.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/InputPointers.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/LastComposedWord.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/LatinImeLogger.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/SuggestedWords.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/WordComposer.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/settings/NativeSuggestOptions.java \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/ByteArrayDictBuffer.java \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/CollectionUtils.java \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/FileUtils.java \
-        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/JniUtils.java
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/JniUtils.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/LocaleUtils.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/ResizableIntArray.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/StringUtils.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/UnigramProperty.java
 
 DICTTOOL_ONDEVICE_TESTS_DIRECTORY := \
         $(LATINIME_LOCAL_DIR)/tests/src/com/android/inputmethod/latin/makedict/
diff --git a/tools/dicttool/NativeLib.mk b/tools/dicttool/NativeLib.mk
index a3d3c02..05e5841 100644
--- a/tools/dicttool/NativeLib.mk
+++ b/tools/dicttool/NativeLib.mk
@@ -20,12 +20,17 @@
 
 LATINIME_DIR_RELATIVE_TO_DICTTOOL := ../..
 
+ifeq ($(FLAG_DBG), true)
+    $(warning Making debug version of native library)
+    LOCAL_CFLAGS += -DFLAG_DBG -funwind-tables -fno-inline
+endif #FLAG_DBG
+
 ifneq ($(strip $(HOST_JDK_IS_64BIT_VERSION)),)
 LOCAL_CFLAGS += -m64
 LOCAL_LDFLAGS += -m64
 endif #HOST_JDK_IS_64BIT_VERSION
 
-LOCAL_CFLAGS += -DHOST_TOOL -fPIC
+LOCAL_CFLAGS += -DHOST_TOOL -fPIC -Wno-deprecated
 LOCAL_NO_DEFAULT_COMPILER_FLAGS := true
 
 LATINIME_NATIVE_JNI_DIR := $(LATINIME_DIR_RELATIVE_TO_DICTTOOL)/native/jni
@@ -33,11 +38,7 @@
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(LATINIME_NATIVE_SRC_DIR)
 # Used in jni_common.cpp to avoid registering useless methods.
 
-LATIN_IME_JNI_SRC_FILES := \
-    com_android_inputmethod_latin_makedict_Ver3DictDecoder.cpp \
-    jni_common.cpp
-
-LATIN_IME_CORE_SRC_FILES :=
+include $(LOCAL_PATH)/$(LATINIME_NATIVE_JNI_DIR)/NativeFileList.mk
 
 LOCAL_SRC_FILES := \
     $(addprefix $(LATINIME_NATIVE_JNI_DIR)/, $(LATIN_IME_JNI_SRC_FILES)) \
@@ -48,4 +49,5 @@
 include $(BUILD_HOST_SHARED_LIBRARY)
 
 # Clear our private variables
+include $(LOCAL_PATH)/$(LATINIME_NATIVE_JNI_DIR)/CleanupNativeFileList.mk
 LATINIME_DIR_RELATIVE_TO_DICTTOOL := ../..
diff --git a/tools/dicttool/compat/android/content/SharedPreferences.java b/tools/dicttool/compat/android/content/SharedPreferences.java
new file mode 100644
index 0000000..cfeb153
--- /dev/null
+++ b/tools/dicttool/compat/android/content/SharedPreferences.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.content;
+
+public class SharedPreferences {
+    public interface OnSharedPreferenceChangeListener {
+        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key);
+    }
+}
diff --git a/tools/dicttool/compat/android/graphics/Rect.java b/tools/dicttool/compat/android/graphics/Rect.java
new file mode 100644
index 0000000..c7b61d7
--- /dev/null
+++ b/tools/dicttool/compat/android/graphics/Rect.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.graphics;
+
+public class Rect {
+}
diff --git a/tools/dicttool/compat/android/text/TextUtils.java b/tools/dicttool/compat/android/text/TextUtils.java
new file mode 100644
index 0000000..5a94b7d
--- /dev/null
+++ b/tools/dicttool/compat/android/text/TextUtils.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.text;
+
+public class TextUtils {
+    private TextUtils() { /* cannot be instantiated */ }
+
+    /**
+     * Returns true if the string is null or 0-length.
+     * @param str the string to be examined
+     * @return true if str is null or zero length
+     */
+    public static boolean isEmpty(CharSequence str) {
+        if (str == null || str.length() == 0)
+            return true;
+        else
+            return false;
+    }
+
+    /**
+     * Returns true if a and b are equal, including if they are both null.
+     * <p><i>Note: In platform versions 1.1 and earlier, this method only worked well if
+     * both the arguments were instances of String.</i></p>
+     * @param a first CharSequence to check
+     * @param b second CharSequence to check
+     * @return true if a and b are equal
+     */
+    public static boolean equals(CharSequence a, CharSequence b) {
+        if (a == b) return true;
+        int length;
+        if (a != null && b != null && (length = a.length()) == b.length()) {
+            if (a instanceof String && b instanceof String) {
+                return a.equals(b);
+            } else {
+                for (int i = 0; i < length; i++) {
+                    if (a.charAt(i) != b.charAt(i)) return false;
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Returns list of multiple {@link CharSequence} joined into a single
+     * {@link CharSequence} separated by localized delimiter such as ", ".
+     *
+     * @hide
+     */
+    public static CharSequence join(Iterable<CharSequence> list) {
+        final CharSequence delimiter = ", ";
+        return join(delimiter, list);
+    }
+
+    /**
+     * Returns a string containing the tokens joined by delimiters.
+     * @param tokens an array objects to be joined. Strings will be formed from
+     *     the objects by calling object.toString().
+     */
+    public static String join(CharSequence delimiter, Object[] tokens) {
+        StringBuilder sb = new StringBuilder();
+        boolean firstTime = true;
+        for (Object token: tokens) {
+            if (firstTime) {
+                firstTime = false;
+            } else {
+                sb.append(delimiter);
+            }
+            sb.append(token);
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Returns a string containing the tokens joined by delimiters.
+     * @param tokens an array objects to be joined. Strings will be formed from
+     *     the objects by calling object.toString().
+     */
+    public static String join(CharSequence delimiter, Iterable tokens) {
+        StringBuilder sb = new StringBuilder();
+        boolean firstTime = true;
+        for (Object token: tokens) {
+            if (firstTime) {
+                firstTime = false;
+            } else {
+                sb.append(delimiter);
+            }
+            sb.append(token);
+        }
+        return sb.toString();
+    }
+
+}
diff --git a/tools/dicttool/compat/android/util/Log.java b/tools/dicttool/compat/android/util/Log.java
index b3b6dd8..9410e74 100644
--- a/tools/dicttool/compat/android/util/Log.java
+++ b/tools/dicttool/compat/android/util/Log.java
@@ -25,13 +25,19 @@
     public static void d(final String tag, final String message) {
         System.out.println(tag + " : " + message);
     }
-    public static void d(final String tag, final String message, final Throwable e) {
-        System.out.println(tag + " : " + message + " : " + e);
+    public static void d(final String tag, final String message, final Throwable t) {
+        System.out.println(tag + " : " + message + " : " + t);
     }
     public static void e(final String tag, final String message) {
         d(tag, message);
     }
-    public static void e(final String tag, final String message, final Throwable e) {
-        d(tag, message, e);
+    public static void e(final String tag, final String message, final Throwable t) {
+        d(tag, message, t);
+    }
+    public static void w(final String tag, final String message) {
+        d(tag, message);
+    }
+    public static void w(final String tag, final String message, final Throwable t) {
+        d(tag, message, t);
     }
 }
diff --git a/tools/dicttool/compat/android/view/inputmethod/CompletionInfo.java b/tools/dicttool/compat/android/view/inputmethod/CompletionInfo.java
new file mode 100644
index 0000000..fbce725
--- /dev/null
+++ b/tools/dicttool/compat/android/view/inputmethod/CompletionInfo.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.inputmethod;
+
+public class CompletionInfo {
+    public final String getText() { return ""; }
+}
diff --git a/tools/dicttool/compat/android/view/inputmethod/EditorInfo.java b/tools/dicttool/compat/android/view/inputmethod/EditorInfo.java
new file mode 100644
index 0000000..9c71181
--- /dev/null
+++ b/tools/dicttool/compat/android/view/inputmethod/EditorInfo.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.inputmethod;
+
+public class EditorInfo {
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/keyboard/Key.java b/tools/dicttool/compat/com/android/inputmethod/keyboard/Key.java
new file mode 100644
index 0000000..1e63bb5
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/keyboard/Key.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard;
+
+public class Key {
+    public final int getX() { return 0; }
+    public final int getY() { return 0; }
+    public final int getWidth() { return 0; }
+    public final int getHeight() { return 0; }
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/keyboard/Keyboard.java b/tools/dicttool/compat/com/android/inputmethod/keyboard/Keyboard.java
new file mode 100644
index 0000000..61b209f
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/keyboard/Keyboard.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard;
+
+public class Keyboard {
+    private final Key KEY = new Key();
+    public final Key getKey(final int i) { return KEY; }
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/keyboard/ProximityInfo.java b/tools/dicttool/compat/com/android/inputmethod/keyboard/ProximityInfo.java
new file mode 100644
index 0000000..561b663
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/keyboard/ProximityInfo.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard;
+
+public class ProximityInfo {
+    public long getNativeProximityInfo() { return 0l; }
+    private static native long setProximityInfoNative(String locale,
+            int displayWidth, int displayHeight, int gridWidth, int gridHeight,
+            int mostCommonKeyWidth, int mostCommonKeyHeight, int[] proximityCharsArray,
+            int keyCount, int[] keyXCoordinates, int[] keyYCoordinates, int[] keyWidths,
+            int[] keyHeights, int[] keyCharCodes, float[] sweetSpotCenterXs,
+            float[] sweetSpotCenterYs, float[] sweetSpotRadii);
+    private static native void releaseProximityInfoNative(long nativeProximityInfo);
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/latin/LatinIME.java b/tools/dicttool/compat/com/android/inputmethod/latin/LatinIME.java
new file mode 100644
index 0000000..e7aa340
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/latin/LatinIME.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin;
+
+public class LatinIME {
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/latin/settings/AdditionalFeaturesSettingUtils.java b/tools/dicttool/compat/com/android/inputmethod/latin/settings/AdditionalFeaturesSettingUtils.java
new file mode 100644
index 0000000..6a430d5
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/latin/settings/AdditionalFeaturesSettingUtils.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.settings;
+
+public class AdditionalFeaturesSettingUtils {
+    public static final int ADDITIONAL_FEATURES_SETTINGS_SIZE = 0;
+}
diff --git a/tools/dicttool/compat/com/android/inputmethod/latin/settings/SettingsValues.java b/tools/dicttool/compat/com/android/inputmethod/latin/settings/SettingsValues.java
new file mode 100644
index 0000000..0a84cde
--- /dev/null
+++ b/tools/dicttool/compat/com/android/inputmethod/latin/settings/SettingsValues.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.settings;
+
+public class SettingsValues {
+    public boolean isWordCodePoint(final int code) {
+        return Character.isLetter(code);
+    }
+}
diff --git a/tools/dicttool/src/com/android/inputmethod/latin/dicttool/DictionaryMaker.java b/tools/dicttool/src/com/android/inputmethod/latin/dicttool/DictionaryMaker.java
index b3543a0..eb419fc 100644
--- a/tools/dicttool/src/com/android/inputmethod/latin/dicttool/DictionaryMaker.java
+++ b/tools/dicttool/src/com/android/inputmethod/latin/dicttool/DictionaryMaker.java
@@ -23,7 +23,7 @@
 import com.android.inputmethod.latin.makedict.FusionDictionary;
 import com.android.inputmethod.latin.makedict.MakedictLog;
 import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
-import com.android.inputmethod.latin.makedict.Ver3DictEncoder;
+import com.android.inputmethod.latin.makedict.Ver2DictEncoder;
 import com.android.inputmethod.latin.makedict.Ver4DictEncoder;
 
 import java.io.BufferedWriter;
@@ -361,7 +361,7 @@
         if (version == FormatSpec.VERSION4) {
             dictEncoder = new Ver4DictEncoder(outputFile);
         } else {
-            dictEncoder = new Ver3DictEncoder(outputFile);
+            dictEncoder = new Ver2DictEncoder(outputFile);
         }
         dictEncoder.writeDictionary(dict, formatOptions);
     }
diff --git a/tools/dicttool/tests/com/android/inputmethod/latin/dicttool/BinaryDictOffdeviceUtilsTests.java b/tools/dicttool/tests/com/android/inputmethod/latin/dicttool/BinaryDictOffdeviceUtilsTests.java
index 2b0a504..9e397f1 100644
--- a/tools/dicttool/tests/com/android/inputmethod/latin/dicttool/BinaryDictOffdeviceUtilsTests.java
+++ b/tools/dicttool/tests/com/android/inputmethod/latin/dicttool/BinaryDictOffdeviceUtilsTests.java
@@ -24,7 +24,7 @@
 import com.android.inputmethod.latin.makedict.FusionDictionary.DictionaryOptions;
 import com.android.inputmethod.latin.makedict.FusionDictionary.PtNodeArray;
 import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
-import com.android.inputmethod.latin.makedict.Ver3DictEncoder;
+import com.android.inputmethod.latin.makedict.Ver2DictEncoder;
 
 import junit.framework.TestCase;
 
@@ -58,7 +58,7 @@
                 Compress.getCompressedStream(
                         Compress.getCompressedStream(
                                 new BufferedOutputStream(new FileOutputStream(dst)))));
-        final DictEncoder dictEncoder = new Ver3DictEncoder(out);
+        final DictEncoder dictEncoder = new Ver2DictEncoder(out);
         dictEncoder.writeDictionary(dict, new FormatOptions(2, false));
 
         // Test for an actually compressed dictionary and its contents