diff --git a/base/Android.mk b/base/Android.mk
index 162c6cb..7bd317b 100644
--- a/base/Android.mk
+++ b/base/Android.mk
@@ -44,6 +44,7 @@
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
 LOCAL_CPPFLAGS := $(libbase_cppflags)
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_STATIC_LIBRARIES := libcutils
 LOCAL_MULTILIB := both
 include $(BUILD_STATIC_LIBRARY)
 
@@ -53,6 +54,7 @@
 LOCAL_WHOLE_STATIC_LIBRARIES := libbase
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_SHARED_LIBRARIES := libcutils
 LOCAL_MULTILIB := both
 include $(BUILD_SHARED_LIBRARY)
 
@@ -64,6 +66,7 @@
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
 LOCAL_CPPFLAGS := $(libbase_cppflags)
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_STATIC_LIBRARIES := libcutils
 LOCAL_MULTILIB := both
 include $(BUILD_HOST_STATIC_LIBRARY)
 
@@ -72,6 +75,7 @@
 LOCAL_WHOLE_STATIC_LIBRARIES := libbase
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_STATIC_LIBRARIES := libcutils
 LOCAL_MULTILIB := both
 include $(BUILD_HOST_SHARED_LIBRARY)
 
diff --git a/base/logging.cpp b/base/logging.cpp
index 5b70c7d..8bfb204 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include "base/strings.h"
+#include "cutils/threads.h"
 
 // Headers for LogMessage::LogLine.
 #ifdef __ANDROID__
@@ -33,15 +34,6 @@
 #include <unistd.h>
 #endif
 
-// For GetTid.
-#if defined(__APPLE__)
-#include "AvailabilityMacros.h"  // For MAC_OS_X_VERSION_MAX_ALLOWED
-#include <sys/syscall.h>
-#include <sys/time.h>
-#elif !defined(__BIONIC__)
-#include <syscall.h>
-#endif
-
 namespace android {
 namespace base {
 
@@ -52,19 +44,6 @@
 static std::unique_ptr<std::string> gProgramInvocationName;
 static std::unique_ptr<std::string> gProgramInvocationShortName;
 
-#ifndef __ANDROID__
-static pid_t GetTid() {
-#if defined(__APPLE__)
-  uint64_t owner;
-  // Requires Mac OS 10.6
-  CHECK_PTHREAD_CALL(pthread_threadid_np, (NULL, &owner), __FUNCTION__);
-  return owner;
-#else
-  return syscall(__NR_gettid);
-#endif
-}
-#endif  // __ANDROID__
-
 const char* GetCmdLine() {
   return (gCmdLine.get() != nullptr) ? gCmdLine->c_str() : nullptr;
 }
@@ -261,7 +240,7 @@
   CHECK_EQ(strlen(log_characters), FATAL + 1U);
   char severity = log_characters[log_severity];
   fprintf(stderr, "%s %c %5d %5d %s:%u] %s\n", ProgramInvocationShortName(),
-          severity, getpid(), GetTid(), file, line, message);
+          severity, getpid(), gettid(), file, line, message);
 #endif
 }
 
diff --git a/include/cutils/threads.h b/include/cutils/threads.h
index ade9a0c..bb9fdb8 100644
--- a/include/cutils/threads.h
+++ b/include/cutils/threads.h
@@ -37,9 +37,10 @@
     pthread_mutex_t   lock;
     int               has_tls;
     pthread_key_t     tls;
-
 } thread_store_t;
 
+extern pid_t gettid();
+
 #define  THREAD_STORE_INITIALIZER  { PTHREAD_MUTEX_INITIALIZER, 0, 0 }
 
 #else // !defined(_WIN32)
@@ -51,7 +52,6 @@
     int               has_tls;
     DWORD             tls;
     CRITICAL_SECTION  lock;
-
 } thread_store_t;
 
 #define  THREAD_STORE_INITIALIZER  { 0, 0, 0, {0, 0, 0, 0, 0, 0} }
diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index 2c5e351..876b89d 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -68,7 +68,7 @@
 # ========================================================
 LOCAL_MODULE := libcutils
 LOCAL_SRC_FILES := $(commonSources) $(commonHostSources) dlmalloc_stubs.c
-LOCAL_STATIC_LIBRARIES := liblog
+LOCAL_STATIC_LIBRARIES := liblog libbase
 ifneq ($(HOST_OS),windows)
 LOCAL_CFLAGS += -Werror
 endif
diff --git a/libcutils/threads.c b/libcutils/threads.c
index ca600b3..cafeff7 100644
--- a/libcutils/threads.c
+++ b/libcutils/threads.c
@@ -14,9 +14,23 @@
 ** limitations under the License.
 */
 
-#include <cutils/threads.h>
+#include "cutils/threads.h"
 
 #if !defined(_WIN32)
+
+// For gettid.
+#if defined(__APPLE__)
+#include "AvailabilityMacros.h"  // For MAC_OS_X_VERSION_MAX_ALLOWED
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include "base/logging.h"
+#elif defined(__linux__) && !defined(__ANDROID__)
+#include <syscall.h>
+#include <unistd.h>
+#elif defined(_WIN32)
+#include <Windows.h>
+#endif
+
 void*  thread_store_get( thread_store_t*  store )
 {
     if (!store->has_tls)
@@ -42,6 +56,21 @@
     pthread_setspecific( store->tls, value );
 }
 
+// No definition needed for Android because we'll just pick up bionic's copy.
+#ifndef __ANDROID__
+pid_t gettid() {
+#if defined(__APPLE__)
+  uint64_t owner;
+  CHECK_PTHREAD_CALL(pthread_threadid_np, (NULL, &owner), __FUNCTION__);
+  return owner;
+#elif defined(__linux__)
+  return syscall(__NR_gettid);
+#elif defined(_WIN32)
+  return (pid_t)GetCurrentThreadId();
+#endif
+}
+#endif  // __ANDROID__
+
 #else /* !defined(_WIN32) */
 void*  thread_store_get( thread_store_t*  store )
 {
diff --git a/libziparchive/zip_archive.cc b/libziparchive/zip_archive.cc
index 6475649..58285f1 100644
--- a/libziparchive/zip_archive.cc
+++ b/libziparchive/zip_archive.cc
@@ -1123,7 +1123,7 @@
 
 int32_t ExtractEntryToFile(ZipArchiveHandle handle,
                            ZipEntry* entry, int fd) {
-  const int32_t declared_length = entry->uncompressed_length;
+  const uint32_t declared_length = entry->uncompressed_length;
 
   const off64_t current_offset = lseek64(fd, 0, SEEK_CUR);
   if (current_offset == -1) {