3、预编译静态库：
build/core/base_rules.mk:81: * Each module must use a LOCAL_MODULE_TAGS in its
build/core/base_rules.mk:82: * Android.mk. Possible tags declared by a module:
build/core/base_rules.mk:83: *
build/core/base_rules.mk:84: * optional, debug, eng, tests, samples
修改build\core下的文件definitions.mk
define include-prebuilt
include $$(CLEAR_VARS)
LOCAL_SRC_FILES := $(1)
LOCAL_BUILT_MODULE_STEM := $(1)
LOCAL_MODULE_SUFFIX := $$(suffix $(1))
LOCAL_MODULE := $$(basename $(1))
LOCAL_MODULE_CLASS := $(2)
LOCAL_MODULE_TAGS := optional // 加上这句话即可
include $$(BUILD_PREBUILT)
endef
预编译静态库指令：
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
$(call add-prebuilt-files, STATIC_LIBRARIES, libboost_filesystem.a)
$(call add-prebuilt-files, STATIC_LIBRARIES, libboost_system.a)
$(call add-prebuilt-files, STATIC_LIBRARIES, libboost_thread.a)