core: Add a phony package definition
This allows one to declare a meta-package that depends on a list
of modules. This is extremely useful for vendor provided prebulit
libraries where there is a big list of libraries/binaries to include.
Specifying that list in multiple places would be error prone and
eventually lead to very annoying bug hunts.
With a fake package, one does:
LOCAL_MODULE := my_fake_package
LOCAL_REQUIRED_MODULES := <list of required module names>
LOCAL_MODULE_TAGS := optional
include $(BUILD_PHONY_PACKAGE)
Change-Id: Idcfe91f6f2d6d886aba094981a70690e5a808bfc
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/core/config.mk b/core/config.mk
index b283b8c..51a5d9c 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -61,6 +61,7 @@
BUILD_RAW_EXECUTABLE:= $(BUILD_SYSTEM)/raw_executable.mk
BUILD_HOST_EXECUTABLE:= $(BUILD_SYSTEM)/host_executable.mk
BUILD_PACKAGE:= $(BUILD_SYSTEM)/package.mk
+BUILD_PHONY_PACKAGE:= $(BUILD_SYSTEM)/phony_package.mk
BUILD_HOST_PREBUILT:= $(BUILD_SYSTEM)/host_prebuilt.mk
BUILD_PREBUILT:= $(BUILD_SYSTEM)/prebuilt.mk
BUILD_MULTI_PREBUILT:= $(BUILD_SYSTEM)/multi_prebuilt.mk
diff --git a/core/phony_package.mk b/core/phony_package.mk
new file mode 100644
index 0000000..e6c0b6e
--- /dev/null
+++ b/core/phony_package.mk
@@ -0,0 +1,18 @@
+LOCAL_MODULE_CLASS := _FAKE_
+
+ifneq ($(strip $(LOCAL_SRC_FILES)),)
+$(error LOCAL_SRC_FILES are not allowed for phony packages)
+endif
+
+ifeq ($(strip $(LOCAL_REQUIRED_MODULES)),)
+$(error LOCAL_REQUIRED_MODULES is required for phony packages)
+endif
+
+.PHONY: $(LOCAL_MODULE)
+
+$(LOCAL_MODULE): $(LOCAL_REQUIRED_MODULES)
+
+ALL_MODULES += $(LOCAL_MODULE)
+ALL_MODULES.$(LOCAL_MODULE).CLASS := _FAKE_
+
+PACKAGES := $(PACKAGES) $(LOCAL_MODULE)
