Build system support to export include paths

Bug: 5573756
With this change, we can set LOCAL_EXPORT_C_INCLUDE_DIRS in the module
definition to export include dir paths.
Paths in LOCAL_EXPORT_C_INCLUDE_DIRS should be relative to the top dir
of the source tree.
If a library (shared or static) exports some include paths, any module
using it will import the include paths and add them to the compiler
command line.

Change-Id: I49aabc589d2cf214044d13ccd5532ef68209adf0

core/binary.mk

@@ -467,6 +467,26 @@ endif
 asm_objects := $(asm_objects_S) $(asm_objects_s)
 
 
+####################################################
+## Import includes
+####################################################
+import_includes := $(intermediates)/import_includes
+import_includes_deps := $(strip \
+    $(foreach l, $(installed_shared_library_module_names), \
+      $(call intermediates-dir-for,SHARED_LIBRARIES,$(l),$(LOCAL_IS_HOST_MODULE))/export_includes) \
+    $(foreach l, $(LOCAL_STATIC_LIBRARIES) $(LOCAL_WHOLE_STATIC_LIBRARIES), \
+      $(call intermediates-dir-for,STATIC_LIBRARIES,$(l),$(LOCAL_IS_HOST_MODULE))/export_includes))
+$(import_includes) : $(import_includes_deps)
+	@echo Import includes file: $@
+	$(hide) mkdir -p $(dir $@) && rm -f $@
+ifdef import_includes_deps
+	$(hide) for f in $^; do \
+	  cat $$f >> $@; \
+	done
+else
+	$(hide) touch $@
+endif
+
 ###########################################################
 ## Common object handling.
 ###########################################################
@@ -492,7 +512,7 @@ ifndef LOCAL_NDK_VERSION
   LOCAL_C_INCLUDES += $(JNI_H_INCLUDE)
 endif
 
-$(all_objects) : | $(LOCAL_GENERATED_SOURCES)
+$(all_objects) : | $(LOCAL_GENERATED_SOURCES) $(import_includes)
 ALL_C_CPP_ETC_OBJECTS += $(all_objects)
 
 ###########################################################
@@ -592,6 +612,7 @@ $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_CPPFLAGS := $(LOCAL_CPPFLAGS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_RTTI_FLAG := $(LOCAL_RTTI_FLAG)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_DEBUG_CFLAGS := $(debug_cflags)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_C_INCLUDES := $(LOCAL_C_INCLUDES)
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_IMPORT_INCLUDES := $(import_includes)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LDFLAGS := $(LOCAL_LDFLAGS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_LDLIBS := $(LOCAL_LDLIBS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_NO_CRT := $(LOCAL_NO_CRT)
@@ -616,3 +637,19 @@ all_libraries := \
 # are linked into this module.  This will force them to be installed
 # when this module is.
 $(LOCAL_INSTALLED_MODULE): | $(installed_static_library_notice_file_targets)
+
+###########################################################
+# Export includes
+###########################################################
+export_includes := $(intermediates)/export_includes
+$(export_includes): PRIVATE_EXPORT_C_INCLUDE_DIRS := $(LOCAL_EXPORT_C_INCLUDE_DIRS)
+$(export_includes) :
+	@echo Export includes file: $< -- $@
+	$(hide) mkdir -p $(dir $@) && rm -f $@
+ifdef LOCAL_EXPORT_C_INCLUDE_DIRS
+	$(hide) for d in $(PRIVATE_EXPORT_C_INCLUDE_DIRS); do \
+	        echo "-I $$d" >> $@; \
+	        done
+else
+	$(hide) touch $@
+endif

core/clear_vars.mk

@@ -44,6 +44,7 @@ LOCAL_CFLAGS:=
 LOCAL_CPPFLAGS:=
 LOCAL_RTTI_FLAG:=
 LOCAL_C_INCLUDES:=
+LOCAL_EXPORT_C_INCLUDE_DIRS:=
 LOCAL_LDFLAGS:=
 LOCAL_LDLIBS:=
 LOCAL_AAPT_FLAGS:=

core/definitions.mk

@@ -875,6 +875,7 @@ define transform-cpp-to-o
 @echo "target $(PRIVATE_ARM_MODE) C++: $(PRIVATE_MODULE) <= $<"
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
+	@$(PRIVATE_IMPORT_INCLUDES) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -904,6 +905,7 @@ define transform-c-or-s-to-o-no-deps
 @mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CC) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
+	@$(PRIVATE_IMPORT_INCLUDES) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -965,6 +967,7 @@ define transform-host-cpp-to-o
 @echo "host C++: $(PRIVATE_MODULE) <= $<"
 $(hide) $(PRIVATE_CXX) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
+	@$(PRIVATE_IMPORT_INCLUDES) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \
@@ -992,6 +995,7 @@ define transform-host-c-or-s-to-o-no-deps
 @mkdir -p $(dir $@)
 $(hide) $(PRIVATE_CC) \
 	$(addprefix -I , $(PRIVATE_C_INCLUDES)) \
+	@$(PRIVATE_IMPORT_INCLUDES) \
 	$(addprefix -isystem ,\
 	    $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
 	        $(filter-out $(PRIVATE_C_INCLUDES), \

core/host_shared_library.mk

@@ -18,6 +18,9 @@ endif
 ifneq ($(strip $(OVERRIDE_BUILT_MODULE_PATH)),)
 $(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
 endif
+ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
+$(error $(LOCAL_PATH): Can not set module stem for a library)
+endif
 
 # Put the built modules of all shared libraries in a common directory
 # to simplify the link line.

core/host_static_library.mk

@@ -13,6 +13,9 @@ endif
 ifeq ($(strip $(LOCAL_MODULE_SUFFIX)),)
 LOCAL_MODULE_SUFFIX := .a
 endif
+ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
+$(error $(LOCAL_PATH): Can not set module stem for a library)
+endif
 LOCAL_UNINSTALLABLE_MODULE := true
 
 LOCAL_IS_HOST_MODULE := true

core/legacy_prebuilts.mk

@@ -84,7 +84,6 @@ GRANDFATHERED_ALL_PREBUILT := \
 	libGLESv1_CM_tegra.so \
 	libGLESv2_POWERVR_SGX530_121.so \
 	libGLESv2_tegra.so \
-	libmdmctrl.a \
 	libmoto_ril.so \
 	libpppd_plugin-ril.so \
 	libril_rds.so \

core/prebuilt.mk

@@ -27,6 +27,14 @@ ifeq (SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS))
   OVERRIDE_BUILT_MODULE_PATH := $($(my_prefix)OUT_INTERMEDIATE_LIBRARIES)
 endif
 
+# Deal with the OSX library timestamp issue when installing
+# a prebuilt simulator library.
+ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
+  prebuilt_module_is_a_library := true
+else
+  prebuilt_module_is_a_library :=
+endif
+
 ifeq ($(LOCAL_STRIP_MODULE),true)
   ifdef LOCAL_IS_HOST_MODULE
     $(error Cannot strip host module LOCAL_PATH=$(LOCAL_PATH))
@@ -42,14 +50,13 @@ ifeq ($(LOCAL_STRIP_MODULE),true)
 else
   include $(BUILD_SYSTEM)/base_rules.mk
   built_module := $(LOCAL_BUILT_MODULE)
-endif
 
-# Deal with the OSX library timestamp issue when installing
+ifdef prebuilt_module_is_a_library
-# a prebuilt simulator library.
+# Create a dummy export_includes.
-ifneq ($(filter STATIC_LIBRARIES SHARED_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
+$(intermediates)/export_includes:
-  prebuilt_module_is_a_library := true
+	$(hide) mkdir -p $(dir $@) && rm -f $@
-else
+	$(hide) touch $@
-  prebuilt_module_is_a_library :=
+endif
 endif
 
 PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
@@ -115,6 +122,13 @@ $(built_module) : $(LOCAL_PATH)/$(LOCAL_SRC_FILES)
 else
 $(built_module) : $(LOCAL_PATH)/$(LOCAL_SRC_FILES) | $(ACP)
 	$(transform-prebuilt-to-target)
+ifneq ($(prebuilt_module_is_a_library),)
+  ifneq ($(LOCAL_IS_HOST_MODULE),)
+	$(transform-host-ranlib-copy-hack)
+  else
+	$(transform-ranlib-copy-hack)
+  endif
+endif
 endif
 endif
 
@@ -135,11 +149,3 @@ $(common_javalib_jar) : $(common_classes_jar) | $(ACP)
 # make sure the classes.jar and javalib.jar are built before $(LOCAL_BUILT_MODULE)
 $(built_module) : $(common_javalib_jar)
 endif # TARGET JAVA_LIBRARIES
-
-ifneq ($(prebuilt_module_is_a_library),)
-  ifneq ($(LOCAL_IS_HOST_MODULE),)
-	$(transform-host-ranlib-copy-hack)
-  else
-	$(transform-ranlib-copy-hack)
-  endif
-endif

core/shared_library.mk

@@ -16,6 +16,9 @@ endif
 ifneq ($(strip $(OVERRIDE_BUILT_MODULE_PATH)),)
 $(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
 endif
+ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
+$(error $(LOCAL_PATH): Can not set module stem for a library)
+endif
 
 # Put the built targets of all shared libraries in a common directory
 # to simplify the link line.

core/static_library.mk

@@ -14,6 +14,9 @@ ifeq ($(strip $(LOCAL_MODULE_SUFFIX)),)
 LOCAL_MODULE_SUFFIX := .a
 endif
 LOCAL_UNINSTALLABLE_MODULE := true
+ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
+$(error $(LOCAL_PATH): Can not set module stem for a library)
+endif
 
 include $(BUILD_SYSTEM)/binary.mk