--- a/CLOBBER
+++ b/CLOBBER
@@ -17,9 +17,9 @@
 #
 # Modifying this file will now automatically clobber the buildbot machines \o/
 #
 
 # Are you updating CLOBBER because you think it's needed for your WebIDL
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Bug 989137 - /experiments needed clobber to build on OSX
+Bug 988168 requires a clobber because of the location change for the linked libxul.

--- a/config/config.mk
+++ b/config/config.mk
@@ -335,28 +335,28 @@ endif
 #
 # Build using PIC by default
 #
 _ENABLE_PIC=1
 
 # Determine if module being compiled is destined
 # to be merged into libxul
 
-ifneq (,$(filter xul,$(FINAL_LIBRARY) $(LIBRARY_NAME)))
+ifneq (,$(filter xul xul-%,$(FINAL_LIBRARY) $(LIBRARY_NAME)))
   ifdef LIBXUL_LIBRARY
     $(error LIBRARY_NAME or FINAL_LIBRARY is "xul", LIBXUL_LIBRARY is implied)
   endif
   LIBXUL_LIBRARY := 1
 endif
 
 ifdef LIBXUL_LIBRARY
 ifdef IS_COMPONENT
 $(error IS_COMPONENT is set, but is not compatible with LIBXUL_LIBRARY)
 endif
-ifneq (xul,$(LIBRARY_NAME))
+ifeq (,$(filter xul xul-%,$(LIBRARY_NAME)))
 FORCE_STATIC_LIB=1
 endif
 endif
 
 # If we are building this component into an extension/xulapp, it cannot be
 # statically linked. In the future we may want to add a xulapp meta-component
 # build option.
 

--- a/content/media/gtest/moz.build
+++ b/content/media/gtest/moz.build
@@ -6,18 +6,17 @@
 
 LIBRARY_NAME = 'media_gtest'
 
 UNIFIED_SOURCES += [
     'TestAudioCompactor.cpp',
     'TestTrackEncoder.cpp',
 ]
 
-LIBXUL_LIBRARY = True
-
 EXPORT_LIBRARY = True
 
 include('/ipc/chromium/chromium-config.mozbuild')
 
 LOCAL_INCLUDES += [
     '/content/media/encoder',
 ]
 
+FINAL_LIBRARY = 'xul-gtest'

--- a/gfx/tests/gtest/moz.build
+++ b/gfx/tests/gtest/moz.build
@@ -34,20 +34,19 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] != 'wind
         'TestPoint.cpp',
         'TestScaling.cpp',
     ]]
     UNIFIED_SOURCES += [
         'TestMoz2D.cpp',
         'TestRect.cpp',
     ]
 
-LIBXUL_LIBRARY = True
-
 EXPORT_LIBRARY = True
 
 include('/ipc/chromium/chromium-config.mozbuild')
 
 LOCAL_INCLUDES += [
     '/gfx/2d',
     '/gfx/2d/unittest',
     '/gfx/layers',
 ]
 
+FINAL_LIBRARY = 'xul-gtest'

--- a/security/manager/ssl/tests/gtest/moz.build
+++ b/security/manager/ssl/tests/gtest/moz.build
@@ -1,22 +1,22 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 LIBRARY_NAME = 'ssltest'
 
-LIBXUL_LIBRARY = True
-
 SOURCES += [
     'OCSPCacheTest.cpp',
     'TLSIntoleranceTest.cpp',
 ]
 
 LOCAL_INCLUDES += [
     '../../../../certverifier',
     '../../../../pkix/include',
     '/security/manager/ssl/src',
 ]
 
 include('/ipc/chromium/chromium-config.mozbuild')
+
+FINAL_LIBRARY = 'xul-gtest'

--- a/testing/gtest/moz.build
+++ b/testing/gtest/moz.build
@@ -58,19 +58,18 @@ SOURCES += [
 ]
 
 LIBRARY_NAME = 'gtest'
 
 SOURCES += [
     'mozilla/SanityTest.cpp',
 ]
 
-LIBXUL_LIBRARY = True
-
 EXPORT_LIBRARY = True
 
 LOCAL_INCLUDES += [
     'gmock',
     'gmock/include',
     'gtest',
     'gtest/include',
 ]
 
+FINAL_LIBRARY = 'xul-gtest'

--- a/toolkit/library/Makefile.in
+++ b/toolkit/library/Makefile.in
@@ -1,327 +1,29 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 
-ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
-# This is going to be a framework named "XUL", not an ordinary library named
-# "libxul.dylib"
-SHARED_LIBRARY_NAME=XUL
-# Setting MAKE_FRAMEWORK makes DLL_PREFIX and DLL_SUFFIX be ignored when
-# setting SHARED_LIBRARY; we need to leave DLL_PREFIX and DLL_SUFFIX
-# as-is so that dependencies of the form -ltracemalloc still work.
-MAKE_FRAMEWORK=1
-endif
-
 ifdef MOZ_CONTENT_SANDBOX
 ifeq ($(OS_ARCH),WINNT)
   SHARED_LIBRARY_LIBS += ../../security/sandbox/win/src/sandboxbroker/$(LIB_PREFIX)sandboxbroker.$(LIB_SUFFIX)
 endif
 endif
 
 # COMPONENT_LIBS is mosly useless since bug 935881, but is kept for
 # MOZ_APP_COMPONENT_LIBS, used by comm-central, and gtest linking.
 SHARED_LIBRARY_LIBS += \
   $(foreach component,$(COMPONENT_LIBS),$(DEPTH)/staticlib/$(LIB_PREFIX)$(component).$(LIB_SUFFIX)) \
   $(NULL)
 
-# dependent libraries
-ifdef MOZ_B2G_BT_BLUEZ #{
-ifeq (gonk,$(MOZ_WIDGET_TOOLKIT))
-OS_LIBS += -ldbus
-endif
-endif #}
-
-ifdef MOZ_B2G_CAMERA #{
-OS_LIBS += -lstagefright -lstagefright_omx
-endif #}
-
-ifeq (Linux,$(OS_ARCH))
-ifneq (Android,$(OS_TARGET))
-OS_LIBS += -lrt
-EXTRA_DSO_LDOPTS += -Wl,-version-script,symverscript
-
-symverscript: symverscript.in
-	$(call py_action,preprocessor, \
-		-DVERSION='$(LIBRARY_NAME)$(MOZILLA_SYMBOLVERSION)' $< -o $@)
-
-EXTRA_DEPS += symverscript
-endif
-endif
-
 ifdef MOZ_APP_COMPONENT_LIBS
 COMPONENT_LIBS += $(MOZ_APP_COMPONENT_LIBS)
 endif
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
-OS_LIBS += -lcups
-endif
-
-EXTRA_DSO_LDOPTS += \
-  $(LIBS_DIR) \
-  $(MOZ_JS_LIBS) \
-  $(NSS_LIBS) \
-  $(MOZ_CAIRO_OSLIBS) \
-  $(MOZ_APP_EXTRA_LIBS) \
-  $(SQLITE_LIBS) \
-  $(NULL)
-
-ifdef ENABLE_INTL_API
-ifdef JS_SHARED_LIBRARY
-EXTRA_DSO_LDOPTS += $(MOZ_ICU_LIBS)
-endif
-endif
-
-ifdef MOZ_NATIVE_JPEG
-EXTRA_DSO_LDOPTS += $(MOZ_JPEG_LIBS)
-endif
-
-ifdef MOZ_NATIVE_PNG
-EXTRA_DSO_LDOPTS += $(MOZ_PNG_LIBS)
-endif
-
-ifndef ZLIB_IN_MOZGLUE
-EXTRA_DSO_LDOPTS += $(MOZ_ZLIB_LIBS)
-endif
-
-ifdef MOZ_NATIVE_HUNSPELL
-EXTRA_DSO_LDOPTS += $(MOZ_HUNSPELL_LIBS)
-endif
-
-ifdef MOZ_NATIVE_LIBEVENT
-EXTRA_DSO_LDOPTS += $(MOZ_LIBEVENT_LIBS)
-endif
-
-ifdef MOZ_NATIVE_LIBVPX
-EXTRA_DSO_LDOPTS += $(MOZ_LIBVPX_LIBS)
-endif
-
-ifndef MOZ_TREE_PIXMAN
-EXTRA_DSO_LDOPTS += $(MOZ_PIXMAN_LIBS)
-endif
-
-ifdef MOZ_DMD
-EXTRA_DSO_LDOPTS += $(call EXPAND_LIBNAME_PATH,dmd,$(DIST)/lib)
-endif
-
-EXTRA_DSO_LDOPTS += $(call EXPAND_LIBNAME_PATH,gkmedias,$(DIST)/lib)
-
-ifdef MOZ_WEBRTC
-ifeq (WINNT,$(OS_TARGET))
-ifndef MOZ_HAS_WINSDK_WITH_D3D
-EXTRA_DSO_LDOPTS += \
-  -LIBPATH:'$(MOZ_DIRECTX_SDK_PATH)/lib/$(MOZ_DIRECTX_SDK_CPU_SUFFIX)' \
-  $(NULL)
-endif
-OS_LIBS += $(call EXPAND_LIBNAME,secur32 crypt32 iphlpapi strmiids dmoguids wmcodecdspuuid amstrmid msdmo wininet)
-endif
-endif
-
-
-ifdef MOZ_ALSA
-EXTRA_DSO_LDOPTS += $(MOZ_ALSA_LIBS)
-endif
-
-ifdef HAVE_CLOCK_MONOTONIC
-EXTRA_DSO_LDOPTS += $(REALTIME_LIBS)
-endif
-
-ifeq (android,$(MOZ_WIDGET_TOOLKIT))
-OS_LIBS += -lGLESv2
-endif
-
-ifeq (gonk,$(MOZ_WIDGET_TOOLKIT))
-OS_LIBS += \
-  -lui \
-  -lmedia \
-  -lhardware_legacy \
-  -lhardware \
-  -lutils \
-  -lcutils \
-  -lsysutils \
-  -lcamera_client \
-  -lsensorservice \
-  -lstagefright \
-  -lstagefright_foundation \
-  -lstagefright_omx \
-  -lbinder \
-  -lgui \
-  $(NULL)
-endif
-
-ifneq (,$(filter rtsp,$(NECKO_PROTOCOLS)))
-OS_LIBS += -lstagefright_foundation
-endif
-
-ifdef MOZ_WMF
-OS_LIBS += $(call EXPAND_LIBNAME,mfuuid wmcodecdspuuid strmiids)
-endif
-
-ifdef MOZ_DIRECTSHOW
-OS_LIBS += $(call EXPAND_LIBNAME,dmoguids wmcodecdspuuid strmiids msdmo)
-endif
-
-ifneq (,$(filter WINNT,$(OS_ARCH)))
-SDK_LIBRARY = $(IMPORT_LIBRARY)
-else
-SDK_LIBRARY = $(SHARED_LIBRARY)
+CXXFLAGS += $(TK_CFLAGS)
 endif
 
-EXTRA_DSO_LDOPTS += $(LIBS_DIR)
-
-EXTRA_DSO_LDOPTS += $(NSPR_LIBS) $(MOZALLOC_LIB)
-
-ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
-CXXFLAGS += $(TK_CFLAGS)
-OS_LIBS += \
-  $(TK_LIBS) \
-  $(NULL)
-endif
-
-ifeq (OpenBSD,$(OS_ARCH))
-EXTRA_DSO_LDOPTS += -lsndio
-endif
-
-ifdef MOZ_ENABLE_DBUS
-EXTRA_DSO_LDOPTS += $(MOZ_DBUS_GLIB_LIBS)
-endif
-
-ifdef MOZ_WIDGET_GTK
-EXTRA_DSO_LDOPTS += $(TK_LIBS)
-EXTRA_DSO_LDOPTS += $(XLDFLAGS) $(XLIBS) $(XEXT_LIBS) $(XCOMPOSITE_LIBS) $(MOZ_PANGO_LIBS) $(XT_LIBS) -lgthread-2.0
-EXTRA_DSO_LDOPTS += $(FT2_LIBS)
-endif
-
-ifeq (qt,$(MOZ_WIDGET_TOOLKIT))
-EXTRA_DSO_LDOPTS += $(XLDFLAGS) $(XLIBS) $(XT_LIBS) $(MOZ_QT_LIBS)
-EXTRA_DSO_LDOPTS += $(FT2_LIBS) $(MOZ_PANGO_LIBS)
-endif
-
-ifdef MOZ_TREE_FREETYPE
-EXTRA_DSO_LDOPTS += $(FT2_LIBS)
-endif
-
-ifdef MOZ_ENABLE_STARTUP_NOTIFICATION
-EXTRA_DSO_LDOPTS += $(MOZ_STARTUP_NOTIFICATION_LIBS)
-endif
-
-ifdef MOZ_ENABLE_LIBPROXY
-EXTRA_DSO_LDOPTS += $(MOZ_LIBPROXY_LIBS)
-endif
-
-ifeq ($(OS_ARCH),SunOS)
-ifdef GNU_CC
-EXTRA_DSO_LDOPTS += -lelf
-else
-EXTRA_DSO_LDOPTS += -lelf -ldemangle
-endif
-endif
-
-ifneq (,$(filter DragonFly FreeBSD NetBSD OpenBSD,$(OS_ARCH)))
-OS_LIBS += $(call EXPAND_LIBNAME,kvm)
-endif
-
-ifeq ($(OS_ARCH),FreeBSD)
-OS_LIBS += $(call EXPAND_LIBNAME,util)
-endif
-
-ifeq ($(OS_ARCH),WINNT)
-OS_LIBS += $(call EXPAND_LIBNAME,shell32 ole32 version winspool comdlg32 imm32 msimg32 shlwapi psapi ws2_32 dbghelp rasapi32 rasdlg iphlpapi uxtheme setupapi secur32 sensorsapi portabledeviceguids windowscodecs wininet wbemuuid wintrust)
-ifdef ACCESSIBILITY
-OS_LIBS += $(call EXPAND_LIBNAME,oleacc)
-endif
-ifdef MOZ_METRO
-OS_LIBS += $(call EXPAND_LIBNAME,uiautomationcore runtimeobject)
-endif
-ifdef MOZ_GAMEPAD
-ifdef MOZ_HAS_WINSDK_WITH_D3D
-OS_LIBS += $(call EXPAND_LIBNAME,dxguid dinput8)
-else
-OS_LIBS += $(call EXPAND_LIBNAME_PATH,dxguid dinput8, $(subst \,/,$(MOZ_DIRECTX_SDK_PATH))/Lib/$(MOZ_DIRECTX_SDK_CPU_SUFFIX))
-endif
-endif
-endif # WINNT
-
-ifdef MOZ_JPROF
-EXTRA_DSO_LDOPTS += -ljprof
-endif
-
-ifdef MOZ_ENABLE_QT
-EXTRA_DSO_LDOPTS += $(MOZ_QT_LDFLAGS) $(XEXT_LIBS)
-endif
-
-ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))
-ifdef MOZ_GSTREAMER
-EXTRA_DSO_LDOPTS += $(GSTREAMER_LIBS)
-endif
-endif
-
-# Generate GDB pretty printer-autoload files only on Linux. OSX's GDB is
-# too old to support Python pretty-printers; if this changes, we could make
-# this 'ifdef GNU_CC'.
-ifeq (Linux,$(OS_ARCH))
-# Create a GDB Python auto-load file alongside the libxul shared library in
-# the build directory.
-PP_TARGETS += LIBXUL_AUTOLOAD
-LIBXUL_AUTOLOAD = libxul.so-gdb.py.in
-LIBXUL_AUTOLOAD_FLAGS := -Dtopsrcdir=$(abspath $(topsrcdir))
-endif
-
-ifdef MAKE_FRAMEWORK
-EFFECTIVE_LIB_PREFIX=
-EFFECTIVE_LIB_SUFFIX=
-else
-EFFECTIVE_LIB_PREFIX=$(DLL_PREFIX)
-EFFECTIVE_LIB_SUFFIX=$(DLL_SUFFIX)
-endif
-
-GTEST_LIB = $(EFFECTIVE_LIB_PREFIX)gtest/$(EFFECTIVE_LIB_PREFIX)$(SHARED_LIBRARY_NAME)$(EFFECTIVE_LIB_SUFFIX)
-EXTRA_MDDEPEND_FILES = $(GTEST_LIB).pp
-
 include $(topsrcdir)/config/rules.mk
 
-OS_LIBS += $(LIBICONV)
-
-ifeq ($(MOZ_WIDGET_TOOLKIT),windows)
-OS_LIBS += $(call EXPAND_LIBNAME,usp10 oleaut32)
-endif
-
-ifeq (WINNT_1,$(OS_TARGET)_$(MOZ_PROFILE_USE))
-# Wrap linker to measure peak virtual memory usage.
-LD := $(PYTHON) $(topsrcdir)/build/link.py $(CURDIR)/linker-vsize $(LD)
-endif
-
-ifndef LINK_GTEST
-ifdef COMPILE_ENVIRONMENT
-libs:: $(FINAL_TARGET)/dependentlibs.list
-endif
-endif
-
 .PHONY: gtestxul
-
-$(FINAL_TARGET)/dependentlibs.list.gtest: $(FINAL_TARGET)/dependentlibs.list
-	sed -e 's|$(SHARED_LIBRARY)|gtest/$(SHARED_LIBRARY)|' $< > $@
-
-# Remove this target when actually linking gtest to prevent redefining
-# the implicit rules.mk target
-ifndef LINK_GTEST
-
-gtestxul: $(GTEST_LIB)
-
-$(GTEST_LIB): $(FINAL_TARGET)/dependentlibs.list.gtest
-	$(MKDIR) -p $(EFFECTIVE_LIB_PREFIX)gtest
-	$(MAKE) libs SHARED_LIBRARY_NAME=gtest/$(EFFECTIVE_LIB_PREFIX)$(LIBRARY_NAME) FINAL_TARGET=$(FINAL_TARGET)/gtest SDK_LIBRARY= IMPORT_LIB_DEST=$(IMPORT_LIB_DEST)/gtest LINK_GTEST=true
-endif
-
-ifdef LINK_GTEST
-
-COMPONENT_LIBS += \
-  gtest \
-  gfxtest \
-  ssltest \
-  xpcom_glue_gtest \
-  media_gtest \
-  $(NULL)
-endif
-
-$(FINAL_TARGET)/dependentlibs.list: dependentlibs.py $(SHARED_LIBRARY) $(wildcard $(if $(wildcard $(FINAL_TARGET)/dependentlibs.list),$(addprefix $(FINAL_TARGET)/,$(shell cat $(FINAL_TARGET)/dependentlibs.list))))
-	$(PYTHON) $< $(SHARED_LIBRARY) -L $(FINAL_TARGET) $(if $(TOOLCHAIN_PREFIX),$(addprefix -p ,$(TOOLCHAIN_PREFIX))) > $@
+gtestxul:
+	$(MAKE) -C gtest libs LINK_GTEST=1

new file mode 100644
--- /dev/null
+++ b/toolkit/library/build/Makefile.in
@@ -0,0 +1,25 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+include $(topsrcdir)/toolkit/library/libxul.mk
+
+ifeq (WINNT_1,$(OS_TARGET)_$(MOZ_PROFILE_USE))
+# Wrap linker to measure peak virtual memory usage.
+LD := $(PYTHON) $(topsrcdir)/build/link.py $(DEPTH)/toolkit/library/linker-vsize $(LD)
+endif
+
+ifneq (,$(filter WINNT,$(OS_ARCH)))
+SDK_LIBRARY = $(IMPORT_LIBRARY)
+else
+SDK_LIBRARY = $(SHARED_LIBRARY)
+endif
+
+include $(topsrcdir)/config/rules.mk
+
+ifdef COMPILE_ENVIRONMENT
+libs:: $(FINAL_TARGET)/dependentlibs.list
+endif
+
+$(FINAL_TARGET)/dependentlibs.list: $(topsrcdir)/toolkit/library/dependentlibs.py $(SHARED_LIBRARY) $(wildcard $(if $(wildcard $(FINAL_TARGET)/dependentlibs.list),$(addprefix $(FINAL_TARGET)/,$(shell cat $(FINAL_TARGET)/dependentlibs.list))))
+	$(PYTHON) $< $(SHARED_LIBRARY) -L $(FINAL_TARGET) $(if $(TOOLCHAIN_PREFIX),$(addprefix -p ,$(TOOLCHAIN_PREFIX))) > $@

new file mode 100644
--- /dev/null
+++ b/toolkit/library/build/moz.build
@@ -0,0 +1,9 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+LIBRARY_NAME = 'xul-shared'
+
+include('../libxul.mozbuild')

new file mode 100644
--- /dev/null
+++ b/toolkit/library/gtest/Makefile.in
@@ -0,0 +1,21 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+ifndef LINK_GTEST
+# Force to not include backend.mk unless LINK_GTEST is defined.
+# Not including backend.mk makes traversing this directory do nothing.
+STANDALONE_MAKEFILE = 1
+
+else
+
+include $(topsrcdir)/toolkit/library/libxul.mk
+
+ifdef COMPILE_ENVIRONMENT
+libs:: $(DIST)/bin/dependentlibs.list.gtest
+endif
+
+$(DIST)/bin/dependentlibs.list.gtest: $(DIST)/bin/dependentlibs.list
+	sed -e 's|$(SHARED_LIBRARY)|gtest/$(SHARED_LIBRARY)|' $< > $@
+
+endif

new file mode 100644
--- /dev/null
+++ b/toolkit/library/gtest/moz.build
@@ -0,0 +1,11 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+LIBRARY_NAME = 'xul-gtest'
+
+FINAL_TARGET = 'dist/bin/gtest'
+
+include('../libxul.mozbuild')

copy from toolkit/library/Makefile.in
copy to toolkit/library/libxul.mk
--- a/toolkit/library/Makefile.in
+++ b/toolkit/library/libxul.mk
@@ -5,29 +5,23 @@
 ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
 # This is going to be a framework named "XUL", not an ordinary library named
 # "libxul.dylib"
 SHARED_LIBRARY_NAME=XUL
 # Setting MAKE_FRAMEWORK makes DLL_PREFIX and DLL_SUFFIX be ignored when
 # setting SHARED_LIBRARY; we need to leave DLL_PREFIX and DLL_SUFFIX
 # as-is so that dependencies of the form -ltracemalloc still work.
 MAKE_FRAMEWORK=1
+else
+SHARED_LIBRARY_NAME=xul
 endif
 
-ifdef MOZ_CONTENT_SANDBOX
-ifeq ($(OS_ARCH),WINNT)
-  SHARED_LIBRARY_LIBS += ../../security/sandbox/win/src/sandboxbroker/$(LIB_PREFIX)sandboxbroker.$(LIB_SUFFIX)
-endif
-endif
+SHARED_LIBRARY_LIBS += $(call EXPAND_LIBNAME_PATH,xul,$(DEPTH)/toolkit/library)
 
-# COMPONENT_LIBS is mosly useless since bug 935881, but is kept for
-# MOZ_APP_COMPONENT_LIBS, used by comm-central, and gtest linking.
-SHARED_LIBRARY_LIBS += \
-  $(foreach component,$(COMPONENT_LIBS),$(DEPTH)/staticlib/$(LIB_PREFIX)$(component).$(LIB_SUFFIX)) \
-  $(NULL)
+EXTRA_DEPS += $(topsrcdir)/toolkit/library/libxul.mk
 
 # dependent libraries
 ifdef MOZ_B2G_BT_BLUEZ #{
 ifeq (gonk,$(MOZ_WIDGET_TOOLKIT))
 OS_LIBS += -ldbus
 endif
 endif #}
 
@@ -35,28 +29,24 @@ ifdef MOZ_B2G_CAMERA #{
 OS_LIBS += -lstagefright -lstagefright_omx
 endif #}
 
 ifeq (Linux,$(OS_ARCH))
 ifneq (Android,$(OS_TARGET))
 OS_LIBS += -lrt
 EXTRA_DSO_LDOPTS += -Wl,-version-script,symverscript
 
-symverscript: symverscript.in
+symverscript: $(topsrcdir)/toolkit/library/symverscript.in
 	$(call py_action,preprocessor, \
-		-DVERSION='$(LIBRARY_NAME)$(MOZILLA_SYMBOLVERSION)' $< -o $@)
+		-DVERSION='$(SHARED_LIBRARY_NAME)$(MOZILLA_SYMBOLVERSION)' $< -o $@)
 
 EXTRA_DEPS += symverscript
 endif
 endif
 
-ifdef MOZ_APP_COMPONENT_LIBS
-COMPONENT_LIBS += $(MOZ_APP_COMPONENT_LIBS)
-endif
-
 ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
 OS_LIBS += -lcups
 endif
 
 EXTRA_DSO_LDOPTS += \
   $(LIBS_DIR) \
   $(MOZ_JS_LIBS) \
   $(NSS_LIBS) \
@@ -111,17 +101,16 @@ ifndef MOZ_HAS_WINSDK_WITH_D3D
 EXTRA_DSO_LDOPTS += \
   -LIBPATH:'$(MOZ_DIRECTX_SDK_PATH)/lib/$(MOZ_DIRECTX_SDK_CPU_SUFFIX)' \
   $(NULL)
 endif
 OS_LIBS += $(call EXPAND_LIBNAME,secur32 crypt32 iphlpapi strmiids dmoguids wmcodecdspuuid amstrmid msdmo wininet)
 endif
 endif
 
-
 ifdef MOZ_ALSA
 EXTRA_DSO_LDOPTS += $(MOZ_ALSA_LIBS)
 endif
 
 ifdef HAVE_CLOCK_MONOTONIC
 EXTRA_DSO_LDOPTS += $(REALTIME_LIBS)
 endif
 
@@ -155,28 +144,21 @@ endif
 ifdef MOZ_WMF
 OS_LIBS += $(call EXPAND_LIBNAME,mfuuid wmcodecdspuuid strmiids)
 endif
 
 ifdef MOZ_DIRECTSHOW
 OS_LIBS += $(call EXPAND_LIBNAME,dmoguids wmcodecdspuuid strmiids msdmo)
 endif
 
-ifneq (,$(filter WINNT,$(OS_ARCH)))
-SDK_LIBRARY = $(IMPORT_LIBRARY)
-else
-SDK_LIBRARY = $(SHARED_LIBRARY)
-endif
-
 EXTRA_DSO_LDOPTS += $(LIBS_DIR)
 
 EXTRA_DSO_LDOPTS += $(NSPR_LIBS) $(MOZALLOC_LIB)
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
-CXXFLAGS += $(TK_CFLAGS)
 OS_LIBS += \
   $(TK_LIBS) \
   $(NULL)
 endif
 
 ifeq (OpenBSD,$(OS_ARCH))
 EXTRA_DSO_LDOPTS += -lsndio
 endif
@@ -257,71 +239,17 @@ endif
 
 # Generate GDB pretty printer-autoload files only on Linux. OSX's GDB is
 # too old to support Python pretty-printers; if this changes, we could make
 # this 'ifdef GNU_CC'.
 ifeq (Linux,$(OS_ARCH))
 # Create a GDB Python auto-load file alongside the libxul shared library in
 # the build directory.
 PP_TARGETS += LIBXUL_AUTOLOAD
-LIBXUL_AUTOLOAD = libxul.so-gdb.py.in
+LIBXUL_AUTOLOAD = $(topsrcdir)/toolkit/library/libxul.so-gdb.py.in
 LIBXUL_AUTOLOAD_FLAGS := -Dtopsrcdir=$(abspath $(topsrcdir))
 endif
 
-ifdef MAKE_FRAMEWORK
-EFFECTIVE_LIB_PREFIX=
-EFFECTIVE_LIB_SUFFIX=
-else
-EFFECTIVE_LIB_PREFIX=$(DLL_PREFIX)
-EFFECTIVE_LIB_SUFFIX=$(DLL_SUFFIX)
-endif
-
-GTEST_LIB = $(EFFECTIVE_LIB_PREFIX)gtest/$(EFFECTIVE_LIB_PREFIX)$(SHARED_LIBRARY_NAME)$(EFFECTIVE_LIB_SUFFIX)
-EXTRA_MDDEPEND_FILES = $(GTEST_LIB).pp
-
-include $(topsrcdir)/config/rules.mk
-
 OS_LIBS += $(LIBICONV)
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),windows)
 OS_LIBS += $(call EXPAND_LIBNAME,usp10 oleaut32)
 endif
-
-ifeq (WINNT_1,$(OS_TARGET)_$(MOZ_PROFILE_USE))
-# Wrap linker to measure peak virtual memory usage.
-LD := $(PYTHON) $(topsrcdir)/build/link.py $(CURDIR)/linker-vsize $(LD)
-endif
-
-ifndef LINK_GTEST
-ifdef COMPILE_ENVIRONMENT
-libs:: $(FINAL_TARGET)/dependentlibs.list
-endif
-endif
-
-.PHONY: gtestxul
-
-$(FINAL_TARGET)/dependentlibs.list.gtest: $(FINAL_TARGET)/dependentlibs.list
-	sed -e 's|$(SHARED_LIBRARY)|gtest/$(SHARED_LIBRARY)|' $< > $@
-
-# Remove this target when actually linking gtest to prevent redefining
-# the implicit rules.mk target
-ifndef LINK_GTEST
-
-gtestxul: $(GTEST_LIB)
-
-$(GTEST_LIB): $(FINAL_TARGET)/dependentlibs.list.gtest
-	$(MKDIR) -p $(EFFECTIVE_LIB_PREFIX)gtest
-	$(MAKE) libs SHARED_LIBRARY_NAME=gtest/$(EFFECTIVE_LIB_PREFIX)$(LIBRARY_NAME) FINAL_TARGET=$(FINAL_TARGET)/gtest SDK_LIBRARY= IMPORT_LIB_DEST=$(IMPORT_LIB_DEST)/gtest LINK_GTEST=true
-endif
-
-ifdef LINK_GTEST
-
-COMPONENT_LIBS += \
-  gtest \
-  gfxtest \
-  ssltest \
-  xpcom_glue_gtest \
-  media_gtest \
-  $(NULL)
-endif
-
-$(FINAL_TARGET)/dependentlibs.list: dependentlibs.py $(SHARED_LIBRARY) $(wildcard $(if $(wildcard $(FINAL_TARGET)/dependentlibs.list),$(addprefix $(FINAL_TARGET)/,$(shell cat $(FINAL_TARGET)/dependentlibs.list))))
-	$(PYTHON) $< $(SHARED_LIBRARY) -L $(FINAL_TARGET) $(if $(TOOLCHAIN_PREFIX),$(addprefix -p ,$(TOOLCHAIN_PREFIX))) > $@

copy from toolkit/library/moz.build
copy to toolkit/library/libxul.mozbuild
--- a/toolkit/library/moz.build
+++ b/toolkit/library/libxul.mozbuild
@@ -1,73 +1,14 @@
 # -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-LIBRARY_NAME = 'xul'
-
-SOURCES += [
-    'nsStaticXULComponents.cpp',
-]
-
-if CONFIG['OS_ARCH'] == 'WINNT':
-    SOURCES += [
-        'nsDllMain.cpp',
-    ]
-    if not CONFIG['GNU_CC']:
-        LOCAL_INCLUDES += [
-            '/widget/windows',
-            '/xpcom/base',
-        ]
-        RCINCLUDE = 'xulrunner.rc'
-
-# component libraries
-additional_defines = (
-    'MOZ_AUTH_EXTENSION',
-    'MOZ_GIO_COMPONENT',
-    'MOZ_JSDEBUGGER',
-    'MOZ_PERMISSIONS',
-    'MOZ_PREF_EXTENSIONS',
-    'MOZ_SPELLCHECK',
-    'MOZ_UNIVERSALCHARDET',
-    'MOZ_ZIPWRITER',
-)
-
-for var in additional_defines:
-    if CONFIG[var]:
-        DEFINES[var] = True
-
-if CONFIG['MOZ_DEBUG'] and CONFIG['ENABLE_TESTS']:
-    DEFINES['ENABLE_LAYOUTDEBUG'] = True
-
-if CONFIG['MOZ_WIDGET_TOOLKIT'] not in ('android', 'gonk', 'qt',
-                                        'cocoa', 'windows') and \
-   CONFIG['MOZ_XUL']:
-    DEFINES['MOZ_FILEVIEW'] = True
-
-# Platform-specific icon channel stuff - supported mostly-everywhere
-if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('windows', 'mac', 'cocoa',
-                                    'gtk2', 'gtk3', 'qt', 'android'):
-    DEFINES['ICON_DECODER'] = True
-
-LOCAL_INCLUDES += [
-    '/config',
-    # need widget/windows for resource.h (included from widget.rc)
-    '/widget/windows',
-]
-
-if CONFIG['OS_ARCH'] == 'WINNT' and not CONFIG['GNU_CC']:
-    LOCAL_INCLUDES += [
-        '/xpcom/base',
-    ]
-
-FAIL_ON_WARNINGS = True
-
 MSVC_ENABLE_PGO = True
 
 FORCE_SHARED_LIB = True
 
 DELAYLOAD_DLLS += [
     'comdlg32.dll',
     'dbghelp.dll',
     'psapi.dll',

--- a/toolkit/library/moz.build
+++ b/toolkit/library/moz.build
@@ -58,45 +58,9 @@ LOCAL_INCLUDES += [
 
 if CONFIG['OS_ARCH'] == 'WINNT' and not CONFIG['GNU_CC']:
     LOCAL_INCLUDES += [
         '/xpcom/base',
     ]
 
 FAIL_ON_WARNINGS = True
 
-MSVC_ENABLE_PGO = True
-
-FORCE_SHARED_LIB = True
-
-DELAYLOAD_DLLS += [
-    'comdlg32.dll',
-    'dbghelp.dll',
-    'psapi.dll',
-    'rasapi32.dll',
-    'rasdlg.dll',
-    'secur32.dll',
-    'wininet.dll',
-    'winspool.drv'
-]
-
-if CONFIG['MOZ_METRO']:
-    DELAYLOAD_DLLS += [
-        'API-MS-WIN-CORE-WINRT-L' + CONFIG['CRTEXPDLLVERSION'] + '.DLL',
-        'API-MS-WIN-CORE-WINRT-STRING-L' + CONFIG['CRTEXPDLLVERSION'] + '.DLL',
-        'uiautomationcore.dll'
-    ]
-
-if CONFIG['ACCESSIBILITY']:
-    DELAYLOAD_DLLS += ['oleacc.dll']
-
-if CONFIG['MOZ_WEBRTC']:
-    DELAYLOAD_DLLS += ['msdmo.dll']
-
-if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
-    LDFLAGS += [
-        '-framework OpenGL',
-        '-framework SystemConfiguration',
-        '-framework QTKit',
-        '-framework IOKit',
-        '-F%s' % CONFIG['MACOS_PRIVATE_FRAMEWORKS_DIR'],
-        '-framework CoreUI',
-    ]
+DIRS += ['build', 'gtest']

--- a/xpcom/glue/tests/gtest/moz.build
+++ b/xpcom/glue/tests/gtest/moz.build
@@ -10,12 +10,11 @@ UNIFIED_SOURCES += [
 ]
 
 LOCAL_INCLUDES = [
     '../..',
 ]
 
 LIBRARY_NAME = 'xpcom_glue_gtest'
 
-LIBXUL_LIBRARY = True
-
 EXPORT_LIBRARY = True
 
+FINAL_LIBRARY = 'xul-gtest'