diff --git a/include/cutils/bitops.h b/include/cutils/bitops.h
index c26dc54..045830d 100644
--- a/include/cutils/bitops.h
+++ b/include/cutils/bitops.h
@@ -59,7 +59,7 @@
 static inline int bitmask_ffz(unsigned int *bitmask, int num_bits)
 {
     int bit, result;
-    unsigned int i;
+    size_t i;
 
     for (i = 0; i < BITS_TO_WORDS(num_bits); i++) {
         bit = ffs(~bitmask[i]);
@@ -77,7 +77,7 @@
 
 static inline int bitmask_weight(unsigned int *bitmask, int num_bits)
 {
-    int i;
+    size_t i;
     int weight = 0;
 
     for (i = 0; i < BITS_TO_WORDS(num_bits); i++)
diff --git a/include/cutils/fs.h b/include/cutils/fs.h
index d1d4cf2..70f0b92 100644
--- a/include/cutils/fs.h
+++ b/include/cutils/fs.h
@@ -18,6 +18,7 @@
 #define __CUTILS_FS_H
 
 #include <sys/types.h>
+#include <unistd.h>
 
 /*
  * TEMP_FAILURE_RETRY is defined by some, but not all, versions of
diff --git a/include/cutils/trace.h b/include/cutils/trace.h
index dbd5e25..3f49e8c 100644
--- a/include/cutils/trace.h
+++ b/include/cutils/trace.h
@@ -20,6 +20,7 @@
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <unistd.h>
diff --git a/include/log/log_read.h b/include/log/log_read.h
index 54d71a4..946711a 100644
--- a/include/log/log_read.h
+++ b/include/log/log_read.h
@@ -67,7 +67,8 @@
     // timespec
     bool operator== (const timespec &T) const
     {
-        return (tv_sec == T.tv_sec) && (tv_nsec == T.tv_nsec);
+        return (tv_sec == static_cast<uint32_t>(T.tv_sec))
+            && (tv_nsec == static_cast<uint32_t>(T.tv_nsec));
     }
     bool operator!= (const timespec &T) const
     {
@@ -75,8 +76,9 @@
     }
     bool operator< (const timespec &T) const
     {
-        return (tv_sec < T.tv_sec)
-            || ((tv_sec == T.tv_sec) && (tv_nsec < T.tv_nsec));
+        return (tv_sec < static_cast<uint32_t>(T.tv_sec))
+            || ((tv_sec == static_cast<uint32_t>(T.tv_sec))
+                && (tv_nsec < static_cast<uint32_t>(T.tv_nsec)));
     }
     bool operator>= (const timespec &T) const
     {
@@ -84,8 +86,9 @@
     }
     bool operator> (const timespec &T) const
     {
-        return (tv_sec > T.tv_sec)
-            || ((tv_sec == T.tv_sec) && (tv_nsec > T.tv_nsec));
+        return (tv_sec > static_cast<uint32_t>(T.tv_sec))
+            || ((tv_sec == static_cast<uint32_t>(T.tv_sec))
+                && (tv_nsec > static_cast<uint32_t>(T.tv_nsec)));
     }
     bool operator<= (const timespec &T) const
     {
diff --git a/include/log/logger.h b/include/log/logger.h
index ed39c4f..53be1d3 100644
--- a/include/log/logger.h
+++ b/include/log/logger.h
@@ -62,9 +62,8 @@
 
 /*
  * The maximum size of the log entry payload that can be
- * written to the kernel logger driver. An attempt to write
- * more than this amount to /dev/log/* will result in a
- * truncated log entry.
+ * written to the logger. An attempt to write more than
+ * this amount will result in a truncated log entry.
  */
 #define LOGGER_ENTRY_MAX_PAYLOAD	4076
 
diff --git a/include/system/audio.h b/include/system/audio.h
index f36befb..8838e71 100644
--- a/include/system/audio.h
+++ b/include/system/audio.h
@@ -434,6 +434,14 @@
 static const audio_offload_info_t AUDIO_INFO_INITIALIZER = {
     version: AUDIO_OFFLOAD_INFO_VERSION_CURRENT,
     size: sizeof(audio_offload_info_t),
+    sample_rate: 0,
+    channel_mask: 0,
+    format: AUDIO_FORMAT_DEFAULT,
+    stream_type: AUDIO_STREAM_VOICE_CALL,
+    bit_rate: 0,
+    duration_us: 0,
+    has_video: false,
+    is_streaming: false
 };
 
 static inline bool audio_is_output_device(audio_devices_t device)
diff --git a/include/system/window.h b/include/system/window.h
index 588f9c6..cfb4bee 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -26,6 +26,10 @@
 #include <system/graphics.h>
 #include <unistd.h>
 
+#ifndef __unused
+#define __unused __attribute__((__unused__))
+#endif
+
 __BEGIN_DECLS
 
 /*****************************************************************************/
@@ -89,10 +93,10 @@
 
     // Implement the methods that sp<ANativeWindowBuffer> expects so that it
     // can be used to automatically refcount ANativeWindowBuffer's.
-    void incStrong(const void* id) const {
+    void incStrong(const void* /*id*/) const {
         common.incRef(const_cast<android_native_base_t*>(&common));
     }
-    void decStrong(const void* id) const {
+    void decStrong(const void* /*id*/) const {
         common.decRef(const_cast<android_native_base_t*>(&common));
     }
 #endif
@@ -352,10 +356,10 @@
 
     /* Implement the methods that sp<ANativeWindow> expects so that it
        can be used to automatically refcount ANativeWindow's. */
-    void incStrong(const void* id) const {
+    void incStrong(const void* /*id*/) const {
         common.incRef(const_cast<android_native_base_t*>(&common));
     }
-    void decStrong(const void* id) const {
+    void decStrong(const void* /*id*/) const {
         common.decRef(const_cast<android_native_base_t*>(&common));
     }
 #endif
@@ -603,13 +607,13 @@
 
 /* deprecated. Always returns 0. Don't call. */
 static inline int native_window_connect(
-        struct ANativeWindow* window, int api) {
+        struct ANativeWindow* window __unused, int api __unused) {
     return 0;
 }
 
 /* deprecated. Always returns 0. Don't call. */
 static inline int native_window_disconnect(
-        struct ANativeWindow* window, int api) {
+        struct ANativeWindow* window __unused, int api __unused) {
     return 0;
 }
 
diff --git a/include/utils/Functor.h b/include/utils/Functor.h
index e24ded4..09ea614 100644
--- a/include/utils/Functor.h
+++ b/include/utils/Functor.h
@@ -25,7 +25,7 @@
 public:
     Functor() {}
     virtual ~Functor() {}
-    virtual status_t operator ()(int what, void* data) { return NO_ERROR; }
+    virtual status_t operator ()(int /*what*/, void* /*data*/) { return NO_ERROR; }
 };
 
 }; // namespace android
diff --git a/include/utils/LruCache.h b/include/utils/LruCache.h
index 053bfaf..9248ac9 100644
--- a/include/utils/LruCache.h
+++ b/include/utils/LruCache.h
@@ -56,7 +56,7 @@
 
         bool next() {
             mIndex = mCache.mTable->next(mIndex);
-            return mIndex != -1;
+            return (ssize_t)mIndex != -1;
         }
 
         size_t index() const {
@@ -103,9 +103,13 @@
 
 // Implementation is here, because it's fully templated
 template <typename TKey, typename TValue>
-LruCache<TKey, TValue>::LruCache(uint32_t maxCapacity): mMaxCapacity(maxCapacity),
-    mNullValue(NULL), mTable(new BasicHashtable<TKey, Entry>), mYoungest(NULL), mOldest(NULL),
-    mListener(NULL) {
+LruCache<TKey, TValue>::LruCache(uint32_t maxCapacity)
+    : mTable(new BasicHashtable<TKey, Entry>)
+    , mListener(NULL)
+    , mOldest(NULL)
+    , mYoungest(NULL)
+    , mMaxCapacity(maxCapacity)
+    , mNullValue(NULL) {
 };
 
 template<typename K, typename V>