diff --git a/core/Makefile b/core/Makefile
index bf2a2ce..283bb1e 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -691,13 +691,17 @@
 # -----------------------------------------------------------------
 # system image
 #
+# Remove overridden packages from $(ALL_PDK_FUSION_FILES)
+PDK_FUSION_SYSIMG_FILES := \
+    $(filter-out $(foreach p,$(overridden_packages),$(p) %/$(p).apk), \
+        $(ALL_PDK_FUSION_FILES))
 
 INTERNAL_SYSTEMIMAGE_FILES := $(filter $(TARGET_OUT)/%, \
     $(ALL_PREBUILT) \
     $(ALL_COPIED_HEADERS) \
     $(ALL_GENERATED_SOURCES) \
     $(ALL_DEFAULT_INSTALLED_MODULES)\
-    $(ALL_PDK_FUSION_FILES))
+    $(PDK_FUSION_SYSIMG_FILES))
 
 ifdef is_tests_build
 # We don't want to install tests modules to the system partition
@@ -1492,6 +1496,7 @@
 # These are some additional build tasks that need to be run.
 include $(sort $(wildcard $(BUILD_SYSTEM)/tasks/*.mk))
 -include $(sort $(wildcard vendor/*/build/tasks/*.mk))
+-include $(sort $(wildcard device/*/build/tasks/*.mk))
 
 # -----------------------------------------------------------------
 # Create SDK repository packages. Must be done after tasks/* since
diff --git a/core/definitions.mk b/core/definitions.mk
index 2565e6e..bf8ce58 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -883,7 +883,7 @@
 @echo "target $(PRIVATE_ARM_MODE) C++: $(PRIVATE_MODULE) <= $<"
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
-	@$(PRIVATE_IMPORT_INCLUDES) \
+	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -913,7 +913,7 @@
 @mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CC) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
-	@$(PRIVATE_IMPORT_INCLUDES) \
+	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -975,7 +975,7 @@
 @echo "host C++: $(PRIVATE_MODULE) <= $<"
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
-	@$(PRIVATE_IMPORT_INCLUDES) \
+	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -1003,7 +1003,7 @@
 @mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CC) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
-	@$(PRIVATE_IMPORT_INCLUDES) \
+	$(shell cat $(PRIVATE_IMPORT_INCLUDES)) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
diff --git a/core/dumpvar.mk b/core/dumpvar.mk
index 4a44f77..d481742 100644
--- a/core/dumpvar.mk
+++ b/core/dumpvar.mk
@@ -10,15 +10,18 @@
 endif
 
 # Add the ARM toolchain bin dir if it actually exists
-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)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin
-endif
+ifeq ($(TARGET_ARCH),arm)
+    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)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.6/bin
+    endif
+else ifeq ($(TARGET_ARCH),x86)
 
 # Add the x86 toolchain bin dir if it actually exists
-ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-4.6/bin),)
-	# this should be copied to HOST_OUT_EXECUTABLES instead
-	ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-4.6/bin
+    ifneq ($(wildcard $(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-4.6/bin),)
+        # this should be copied to HOST_OUT_EXECUTABLES instead
+        ABP:=$(ABP):$(PWD)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/x86/i686-linux-android-4.6/bin
+    endif
 endif
 ANDROID_BUILD_PATHS := $(ABP)
 ANDROID_PREBUILTS := prebuilt/$(HOST_PREBUILT_TAG)
diff --git a/envsetup.sh b/envsetup.sh
index 84ec3e5..8f311b6 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -131,25 +131,24 @@
         export ANDROID_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
     fi
 
-    export ARM_EABI_TOOLCHAIN=
+    unset ARM_EABI_TOOLCHAIN ARM_EABI_TOOLCHAIN_PATH
     case $ARCH in
-        x86) toolchaindir=x86/i686-eabi-4.4.3/bin
-            ;;
-        arm) toolchaindir=arm/arm-eabi-4.6/bin
+        arm)
+            toolchaindir=arm/arm-eabi-4.6/bin
+            if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
+                 export ARM_EABI_TOOLCHAIN="$gccprebuiltdir/$toolchaindir"
+                 ARM_EABI_TOOLCHAIN_PATH=":$gccprebuiltdir/$toolchaindir"
+            fi
             ;;
         *)
-            echo "Can't find toolchain for unknown architecture: $ARCH"
-            toolchaindir=xxxxxxxxx
+            # No need to set ARM_EABI_TOOLCHAIN for other ARCHs
             ;;
     esac
-    if [ -d "$gccprebuiltdir/$toolchaindir" ]; then
-        export ARM_EABI_TOOLCHAIN=$gccprebuiltdir/$toolchaindir
-    fi
 
     export ANDROID_TOOLCHAIN=$ANDROID_EABI_TOOLCHAIN
     export ANDROID_QTOOLS=$T/development/emulator/qtools
     export ANDROID_DEV_SCRIPTS=$T/development/scripts
-    export ANDROID_BUILD_PATHS=:$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN:$ARM_EABI_TOOLCHAIN$CODE_REVIEWS:$ANDROID_DEV_SCRIPTS
+    export ANDROID_BUILD_PATHS=:$(get_build_var ANDROID_BUILD_PATHS):$ANDROID_QTOOLS:$ANDROID_TOOLCHAIN$ARM_EABI_TOOLCHAIN_PATH$CODE_REVIEWS:$ANDROID_DEV_SCRIPTS
     export PATH=$PATH$ANDROID_BUILD_PATHS
 
     unset ANDROID_JAVA_TOOLCHAIN
diff --git a/tools/droiddoc/templates-sdk/assets/css/default.css b/tools/droiddoc/templates-sdk/assets/css/default.css
index 12f7e66..4e27c49 100644
--- a/tools/droiddoc/templates-sdk/assets/css/default.css
+++ b/tools/droiddoc/templates-sdk/assets/css/default.css
@@ -4026,21 +4026,24 @@
 .landing-docs {
   margin:20px 0 0;
 }
-.landing-banner {
-  height:280px;
-}
 .landing-banner .col-6:first-child,
-.landing-docs .col-6:first-child {
+.landing-docs .col-6:first-child,
+.landing-docs .col-12 {
   margin-left:0;
+  min-height:280px;
 }
 .landing-banner .col-6:last-child,
-.landing-docs .col-6:last-child {
+.landing-docs .col-6:last-child,
+.landing-docs .col-12 {
   margin-right:0;
 }
 
 .landing-banner h1 {
   margin-top:0;
 }
+.landing-docs {
+  clear:left;
+}
 .landing-docs h3 {
   font-size:14px;
   line-height:21px;
diff --git a/tools/droiddoc/templates-sdk/docpage.cs b/tools/droiddoc/templates-sdk/docpage.cs
index 963e9cf..3f9c01a 100644
--- a/tools/droiddoc/templates-sdk/docpage.cs
+++ b/tools/droiddoc/templates-sdk/docpage.cs
@@ -44,17 +44,19 @@
   <?cs if:(!fullpage && !header.hide) ?>
     <?cs if:page.landing ?><?cs # header logic for docs that are landing pages ?>
       <div class="landing-banner">
+        <?cs if:page.landing.image ?><?cs # use two-column layout only if there's an image ?>
         <div class="col-6">
-          <?cs if:page.landing.image ?>
           <img src="<?cs var:toroot ?><?cs var:page.landing.image ?>" alt="" />
-          <?cs /if ?>
         </div>
         <div class="col-6">
+        <?cs /if ?>
           <h1 itemprop="name" style="margin-bottom:0;"><?cs var:page.title ?></h1>
           <p itemprop="description"><?cs var:page.landing.intro ?></p>
           
           <p><a class="next-page-link topic-start-link"></a></p>
+        <?cs if:page.landing.image ?>
         </div>
+        <?cs /if ?>
       </div>
     <?cs else ?>
       <h1 itemprop="name"><?cs var:page.title ?></h1>