diff --git a/core/build_id.mk b/core/build_id.mk
index 00a691f..f39329b 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=LMP
+export BUILD_ID=LKY80
diff --git a/core/clang/config.mk b/core/clang/config.mk
index 5b2aea5..2a2ce94 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -101,3 +101,8 @@
 # This allows us to use the superset of functionality that compiler-rt
 # provides to Clang (for supporting features like -ftrapv).
 COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras
+
+ifeq ($(HOST_PREFER_32_BIT),true)
+# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source.
+FORCE_BUILD_LLVM_COMPONENTS := true
+endif
diff --git a/core/cleanspec.mk b/core/cleanspec.mk
index 500ce54..4441e2a 100644
--- a/core/cleanspec.mk
+++ b/core/cleanspec.mk
@@ -64,6 +64,6 @@
 # ************************************************
 
 subdir_cleanspecs := \
-    $(shell build/tools/findleaves.py --prune=$(OUT_DIR) --prune=.repo --prune=.git . CleanSpec.mk)
+    $(shell build/tools/findleaves.py $(FIND_LEAVES_EXCLUDES) . CleanSpec.mk)
 include $(subdir_cleanspecs)
 subdir_cleanspecs :=
diff --git a/core/config.mk b/core/config.mk
index bfa5610..e6a6812 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -150,6 +150,10 @@
 # are specific to the user's build configuration.
 include $(BUILD_SYSTEM)/envsetup.mk
 
+# Pruned directory options used when using findleaves.py
+# See envsetup.mk for a description of SCAN_EXCLUDE_DIRS
+FIND_LEAVES_EXCLUDES := $(addprefix --prune=, $(OUT_DIR) $(SCAN_EXCLUDE_DIRS) .repo .git)
+
 # The build system exposes several variables for where to find the kernel
 # headers:
 #   TARGET_DEVICE_KERNEL_HEADERS is automatically created for the current
diff --git a/core/definitions.mk b/core/definitions.mk
index 57fc434..946a2a9 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -150,7 +150,7 @@
 # $(1): directory to search under
 # Ignores $(1)/Android.mk
 define first-makefiles-under
-$(shell build/tools/findleaves.py --prune=$(OUT_DIR) --prune=.repo --prune=.git \
+$(shell build/tools/findleaves.py $(FIND_LEAVES_EXCLUDES) \
         --mindepth=2 $(1) Android.mk)
 endef
 
diff --git a/core/envsetup.mk b/core/envsetup.mk
index ad78be3..ba67737 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -5,6 +5,11 @@
 # the bottom for the full list
 #     OUT_DIR is also set to "out" if it's not already set.
 #         this allows you to set it to somewhere else if you like
+#     SCAN_EXCLUDE_DIRS is an optional, whitespace separated list of
+#         directories that will also be excluded from full checkout tree
+#         searches for source or make files, in addition to OUT_DIR.
+#         This can be useful if you set OUT_DIR to be a different directory
+#         than other outputs of your build system.
 
 # Set up version information.
 include $(BUILD_SYSTEM)/version_defaults.mk
diff --git a/core/main.mk b/core/main.mk
index 537a116..0f6315f 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -513,7 +513,7 @@
 # Can't use first-makefiles-under here because
 # --mindepth=2 makes the prunes not work.
 subdir_makefiles := \
-	$(shell build/tools/findleaves.py --prune=$(OUT_DIR) --prune=.repo --prune=.git $(subdirs) Android.mk)
+	$(shell build/tools/findleaves.py $(FIND_LEAVES_EXCLUDES) $(subdirs) Android.mk)
 
 $(foreach mk, $(subdir_makefiles), $(info including $(mk) ...)$(eval include $(mk)))
 
diff --git a/tools/droiddoc/templates-sdk/class.cs b/tools/droiddoc/templates-sdk/class.cs
index 7aa99f9..693eaed 100644
--- a/tools/droiddoc/templates-sdk/class.cs
+++ b/tools/droiddoc/templates-sdk/class.cs
@@ -169,13 +169,15 @@
 
 <div class="jd-descr">
 <?cs call:deprecated_warning(class) ?>
-<?cs if:subcount(class.descr) ?>
+<?cs if:subcount(class.descr) || subcount(class.annotationdocumentation) ?>
 <h2>Class Overview</h2>
-<p itemprop="articleBody"><?cs call:tag_list(class.descr) ?></p>
+<?cs if:subcount(class.descr) ?><p itemprop="articleBody"><?cs call:tag_list(class.descr) ?></p><?cs /if ?>
+<?cs if:subcount(class.annotationdocumentation) ?><?cs each:annodoc = class.annotationdocumentation?>
+<p><?cs var:annodoc.text ?></p>
+<?cs /each?><?cs /if?>
 <?cs /if ?>
 
 <?cs call:see_also_tags(class.seeAlso) ?>
-
 </div><!-- jd-descr -->
 
 
@@ -196,12 +198,12 @@
         </td>
         <td class="jd-linkcol" width="100%"><nobr>
         <span class="sympad"><?cs call:cond_link(method.name, toroot, method.href, included) ?></span>(<?cs call:parameter_list(method.params) ?>)</nobr>
-        <?cs if:subcount(method.shortDescr) || subcount(method.deprecated) ?>
-        <div class="jd-descrdiv">
-          <?cs call:short_descr(method) ?>
-          <?cs call:show_annotations_list(method) ?>
-        </div>
-  <?cs /if ?>
+        <?cs if:subcount(method.shortDescr) || subcount(method.deprecated) || subcount(method.showAnnotations) ?>
+          <div class="jd-descrdiv">
+            <?cs if:subcount(method.shortDescr) || subcount(method.annotationdocumentation) ?><?cs call:short_descr(method)?><?cs /if?>
+            <?cs call:show_annotations_list(method) ?>
+          </div>
+        <?cs /if ?>
   </td></tr>
 <?cs set:count = count + #1 ?>
 <?cs /each ?>