diff --git a/core/Makefile b/core/Makefile
index 452b2c9..afb69b2 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -554,7 +554,7 @@
 # make the target NOTICE files depend on this particular file too, which will
 # then be in the right directory for the find in combine-notice-files to work.
 $(kernel_notice_file): \
-	    prebuilt/$(TARGET_PREBUILT_TAG)/kernel/LINUX_KERNEL_COPYING \
+	    prebuilts/qemu-kernel/arm/LINUX_KERNEL_COPYING \
 	    | $(ACP)
 	@echo Copying: $@
 	$(hide) mkdir -p $(dir $@)
@@ -1305,7 +1305,7 @@
 
 INTERNAL_EMULATOR_PACKAGE_FILES += \
         $(HOST_OUT_EXECUTABLES)/emulator$(HOST_EXECUTABLE_SUFFIX) \
-        prebuilt/android-$(TARGET_ARCH)/kernel/kernel-qemu \
+        prebuilts/qemu-kernel/$(TARGET_ARCH)/kernel-qemu \
         $(INSTALLED_RAMDISK_TARGET) \
 		$(INSTALLED_SYSTEMIMAGE) \
 		$(INSTALLED_USERDATAIMAGE_TARGET)
diff --git a/core/build_id.mk b/core/build_id.mk
index c12f9d1..40bb35d 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -1,4 +1,3 @@
-
 #
 # Copyright (C) 2008 The Android Open Source Project
 #
@@ -14,9 +13,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+#
+# Defines branch-specific values.
+#
+
 # BUILD_ID is usually used to specify the branch name
 # (like "MAIN") or a branch name and a release candidate
-# (like "CRB01").  It must be a single word, and is
+# (like "TC1-RC5").  It must be a single word, and is
 # capitalized by convention.
+#
+BUILD_ID := MASTER
 
-export BUILD_ID=IRM05
+# DISPLAY_BUILD_NUMBER should only be set for development branches,
+# If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
+# a more descriptive BUILD_ID_DISPLAY, otherwise BUILD_ID_DISPLAY
+# is the same as BUILD_ID
+DISPLAY_BUILD_NUMBER := true
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index 3682766..54a64a3 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -57,6 +57,7 @@
        HOST_RUN_RANLIB_AFTER_COPYING := false
 else
        HOST_RUN_RANLIB_AFTER_COPYING := true
+       PRE_LION_DYNAMIC_LINKER_OPTIONS := -Wl,-dynamic
 endif
 HOST_GLOBAL_ARFLAGS := cqs
 
@@ -82,7 +83,7 @@
 define transform-host-o-to-executable-inner
 $(hide) $(PRIVATE_CXX) \
         -o $@ \
-        -Wl,-dynamic -headerpad_max_install_names \
+        $(PRE_LION_DYNAMIC_LINKER_OPTIONS) -headerpad_max_install_names \
         $(HOST_GLOBAL_LD_DIRS) \
         $(HOST_GLOBAL_LDFLAGS) \
         $(call normalize-host-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index 51192f8..ca12ba2 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -43,8 +43,8 @@
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin/arm-linux-androideabi-
+TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/arm-linux-androideabi-
 endif
 
 # Only define these if there's actually a gcc in there.
diff --git a/core/combo/TARGET_linux-sh.mk b/core/combo/TARGET_linux-sh.mk
index b8e00dd..88c6215 100644
--- a/core/combo/TARGET_linux-sh.mk
+++ b/core/combo/TARGET_linux-sh.mk
@@ -19,8 +19,8 @@
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/sh-4.3.3/bin/sh-linux-gnu-
+TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/sh-4.3.3
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/sh-linux-gnu-
 endif
 
 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index 6efc6a4..c27fbb6 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -36,8 +36,8 @@
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $(TARGET_TOOLS_PREFIX)),)
-TARGET_TOOLS_PREFIX := \
-	prebuilt/$(HOST_PREBUILT_TAG)/toolchain/i686-android-linux-4.4.3/bin/i686-android-linux-
+TARGET_TOOLCHAIN_ROOT := prebuilt/$(HOST_PREBUILT_TAG)/toolchain/i686-android-linux-4.4.3
+TARGET_TOOLS_PREFIX := $(TARGET_TOOLCHAIN_ROOT)/bin/i686-android-linux-
 endif
 
 TARGET_CC := $(TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
diff --git a/core/dumpvar.mk b/core/dumpvar.mk
index f91c08a..c3d6b5f 100644
--- a/core/dumpvar.mk
+++ b/core/dumpvar.mk
@@ -10,9 +10,9 @@
 endif
 
 # Add the ARM toolchain bin dir if it actually exists
-ifneq ($(wildcard $(PWD)/prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin),)
+ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin),)
 	# this should be copied to HOST_OUT_EXECUTABLES instead
-	ABP:=$(ABP):$(PWD)/prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-linux-androideabi-4.4.x/bin
+	ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin
 endif
 
 # Add the x86 toolchain bin dir if it actually exists
@@ -22,6 +22,7 @@
 endif
 ANDROID_BUILD_PATHS := $(ABP)
 ANDROID_PREBUILTS := prebuilt/$(HOST_PREBUILT_TAG)
+ANDROID_GCC_PREBUILTS := prebuilts/gcc/$(HOST_PREBUILT_TAG)
 
 # The "dumpvar" stuff lets you say something like
 #
diff --git a/envsetup.sh b/envsetup.sh
index 26784ad..9c121f3 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -112,12 +112,13 @@
     # and in with the new
     CODE_REVIEWS=
     prebuiltdir=$(getprebuilt)
+    gccprebuiltdir=$(get_abs_build_var ANDROID_GCC_PREBUILTS)
 
     # The gcc toolchain does not exists for windows/cygwin. In this case, do not reference it.
     export ANDROID_EABI_TOOLCHAIN=
-    toolchaindir=toolchain/arm-linux-androideabi-4.4.x/bin
-    if [ -d "$prebuiltdir/$toolchaindir" ]; then
-        export ANDROID_EABI_TOOLCHAIN=$prebuiltdir/$toolchaindir
+    toolchaindir=arm/arm-linux-androideabi-4.6/bin
+    if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
+        export ANDROID_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
     fi
 
     export ARM_EABI_TOOLCHAIN=
@@ -658,6 +659,17 @@
     fi
 }
 
+function hmm()
+{
+cat <<EOF
+- m:       Makes from the top of the tree.
+- mm:      Builds all of the modules in the current directory.
+- mmm dir: Same as 'cd dir; mm'
+
+Type 'help' for more commands.
+EOF
+}
+
 function croot()
 {
     T=$(gettop)
diff --git a/libs/host/Android.mk b/libs/host/Android.mk
index d02e4b2..9900f59 100644
--- a/libs/host/Android.mk
+++ b/libs/host/Android.mk
@@ -23,3 +23,5 @@
 
 include $(BUILD_HOST_STATIC_LIBRARY)
 
+# Include toolchain prebuilt modules if they exist.
+-include $(TARGET_TOOLCHAIN_ROOT)/toolchain.mk
diff --git a/target/board/vbox_x86/device.mk b/target/board/vbox_x86/device.mk
index 66a6e84..07ebb1c 100644
--- a/target/board/vbox_x86/device.mk
+++ b/target/board/vbox_x86/device.mk
@@ -24,7 +24,7 @@
     ro.ril.gprsclass=10 \
     ro.adb.qemud=1
 
-LOCAL_KERNEL := prebuilt/android-x86/kernel/kernel-vbox
+LOCAL_KERNEL := prebuilts/qemu-kernel/x86/kernel-vbox
 
 PRODUCT_COPY_FILES := \
     development/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
diff --git a/tools/adbs b/tools/adbs
index b571d48..dd84a83 100755
--- a/tools/adbs
+++ b/tools/adbs
@@ -144,13 +144,13 @@
       uname = "darwin-ppc"
   elif uname == "Linux":
     uname = "linux-x86"
-  prefix = "./prebuilt/" + uname + "/toolchain/arm-linux-androideabi-4.4.x/bin/"
+  prefix = "./prebuilts/gcc/" + uname + "/arm/arm-linux-androideabi-4.6/bin/"
   addr2line_cmd = prefix + "arm-linux-androideabi-addr2line"
 
   if (not os.path.exists(addr2line_cmd)):
     try:
-      prefix = os.environ['ANDROID_BUILD_TOP'] + "/prebuilt/" + uname + \
-               "/toolchain/arm-linux-androideabi-4.4.x/bin/"
+      prefix = os.environ['ANDROID_BUILD_TOP'] + "/prebuilts/gcc/" + \
+               uname + "/arm/arm-linux-androideabi-4.6/bin/"
     except:
       prefix = "";
 
diff --git a/tools/zipalign/ZipEntry.cpp b/tools/zipalign/ZipEntry.cpp
index 4f91fc5..d4d366d 100644
--- a/tools/zipalign/ZipEntry.cpp
+++ b/tools/zipalign/ZipEntry.cpp
@@ -90,7 +90,7 @@
      * prefer the CDE values.)
      */
     if (!hasDD && !compareHeaders()) {
-        LOGW("WARNING: header mismatch\n");
+        ALOGW("WARNING: header mismatch\n");
         // keep going?
     }
 
@@ -200,7 +200,7 @@
     if (padding <= 0)
         return INVALID_OPERATION;
 
-    //LOGI("HEY: adding %d pad bytes to existing %d in %s\n",
+    //ALOGI("HEY: adding %d pad bytes to existing %d in %s\n",
     //    padding, mLFH.mExtraFieldLength, mCDE.mFileName);
 
     if (mLFH.mExtraFieldLength > 0) {
diff --git a/tools/zipalign/ZipFile.cpp b/tools/zipalign/ZipFile.cpp
index a2d5b80..6428e9d 100644
--- a/tools/zipalign/ZipFile.cpp
+++ b/tools/zipalign/ZipFile.cpp
@@ -603,7 +603,7 @@
     if (copyPartialFpToFp(mZipFp, pSourceZip->mZipFp, copyLen, NULL)
         != NO_ERROR)
     {
-        LOGW("copy of '%s' failed\n", pEntry->mCDE.mFileName);
+        ALOGW("copy of '%s' failed\n", pEntry->mCDE.mFileName);
         result = UNKNOWN_ERROR;
         goto bail;
     }
@@ -931,7 +931,7 @@
      * of wasted space at the end of the file.  Remove it now.
      */
     if (ftruncate(fileno(mZipFp), ftell(mZipFp)) != 0) {
-        LOGW("ftruncate failed %ld: %s\n", ftell(mZipFp), strerror(errno));
+        ALOGW("ftruncate failed %ld: %s\n", ftell(mZipFp), strerror(errno));
         // not fatal
     }