android NDK編譯(導入).a文件和編譯多個so文件

一、編譯一個靜態庫 libstatic_android.a

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE    := static_android 
LOCAL_SRC_FILES := libstatic_android.a  
include $(PREBUILT_STATIC_LIBRARY) 

include $(CLEAR_VARS)
LOCAL_MODULE    := fpdfembedsdk
LOCAL_SRC_FILES := xxxx.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../include/
LOCAL_LDLIBS := -llog -g -L. -ljnigraphics

#fill in the foxit library here
#LOCAL_LDLIBS += libstatic_android.a
LOCAL_STATIC_LIBRARIES := static_android
include $(BUILD_SHARED_LIBRARY) #$(BUILD_STATIC_LIBRARY)

二、編譯多個so文件

(1)Android.mk文件首先需要指定LOCAL_PATH變量，用於查找源文件。由於一般情況下Android.mk和需要編譯的源文件在同一目錄下，所以定義成如下形式：

LOCAL_PATH:=$(call my-dir)
上面的語句的意思是將LOCAL_PATH變量定義成本文件所在目錄路徑。
(2)Android.mk中可以定義多個編譯模塊，每個編譯模塊都是以include $(CLEAR_VARS)開始,以include $(BUILD_XXX)結束。
include $(CLEAR_VARS)
CLEAR_VARS由編譯系統提供，指定讓GNU MAKEFILE為你清除除LOCAL_PATH以外的所有LOCAL_XXX變量，
如LOCAL_MODULE，LOCAL_SRC_FILES，LOCAL_SHARED_LIBRARIES，LOCAL_STATIC_LIBRARIES等。

include $(BUILD_STATIC_LIBRARY)表示編譯成靜態庫
include $(BUILD_SHARED_LIBRARY)表示編譯成動態庫。
include $(BUILD_EXECUTABLE)表示編譯成可執行程序

(3)舉例如下(frameworks/base/libs/audioflinger/Android.mk)：

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)  模塊一
ifeq ($(AUDIO_POLICY_TEST),true)
  ENABLE_AUDIO_DUMP := true
endif

LOCAL_SRC_FILES:= \
    AudioHardwareGeneric.cpp \
    AudioHardwareStub.cpp \
    AudioHardwareInterface.cpp
ifeq ($(ENABLE_AUDIO_DUMP),true)
  LOCAL_SRC_FILES += AudioDumpInterface.cpp
  LOCAL_CFLAGS += -DENABLE_AUDIO_DUMP
endif

LOCAL_SHARED_LIBRARIES := \
    libcutils \
    libutils \
    libbinder \
    libmedia \
    libhardware_legacy

ifeq ($(strip $(BOARD_USES_GENERIC_AUDIO)),true)
  LOCAL_CFLAGS += -DGENERIC_AUDIO
endif

LOCAL_MODULE:= libaudiointerface

ifeq ($(BOARD_HAVE_BLUETOOTH),true)
  LOCAL_SRC_FILES += A2dpAudioInterface.cpp
  LOCAL_SHARED_LIBRARIES += liba2dp
  LOCAL_CFLAGS += -DWITH_BLUETOOTH -DWITH_A2DP
  LOCAL_C_INCLUDES += $(call include-path-for, bluez)
endif

include $(BUILD_STATIC_LIBRARY)  模塊一編譯成靜態庫

include $(CLEAR_VARS)  模塊二
LOCAL_SRC_FILES:=               \
    AudioPolicyManagerBase.cpp
LOCAL_SHARED_LIBRARIES := \
    libcutils \
    libutils \
    libmedia

ifeq ($(TARGET_SIMULATOR),true)
  LOCAL_LDLIBS += -ldl
else
  LOCAL_SHARED_LIBRARIES += libdl
endif

LOCAL_MODULE:= libaudiopolicybase
ifeq ($(BOARD_HAVE_BLUETOOTH),true)
  LOCAL_CFLAGS += -DWITH_A2DP
endif

ifeq ($(AUDIO_POLICY_TEST),true)
  LOCAL_CFLAGS += -DAUDIO_POLICY_TEST
endif

include $(BUILD_STATIC_LIBRARY) 模塊二編譯成靜態庫

include $(CLEAR_VARS) 模塊三
LOCAL_SRC_FILES:=               \
    AudioFlinger.cpp            \
    AudioMixer.cpp.arm          \
    AudioResampler.cpp.arm      \
    AudioResamplerSinc.cpp.arm  \
    AudioResamplerCubic.cpp.arm \
    AudioPolicyService.cpp
LOCAL_SHARED_LIBRARIES := \
    libcutils \
    libutils \
    libbinder \
    libmedia \
    libhardware_legacy
ifeq ($(strip $(BOARD_USES_GENERIC_AUDIO)),true)
  LOCAL_STATIC_LIBRARIES += libaudiointerface libaudiopolicybase
  LOCAL_CFLAGS += -DGENERIC_AUDIO
else
  LOCAL_SHARED_LIBRARIES += libaudio libaudiopolicy
endif

ifeq ($(TARGET_SIMULATOR),true)
  LOCAL_LDLIBS += -ldl
else
  LOCAL_SHARED_LIBRARIES += libdl
endif

LOCAL_MODULE:= libaudioflinger
ifeq ($(BOARD_HAVE_BLUETOOTH),true)
  LOCAL_CFLAGS += -DWITH_BLUETOOTH -DWITH_A2DP
  LOCAL_SHARED_LIBRARIES += liba2dp
endif

ifeq ($(AUDIO_POLICY_TEST),true)
  LOCAL_CFLAGS += -DAUDIO_POLICY_TEST
endif

ifeq ($(TARGET_SIMULATOR),true)
    ifeq ($(HOST_OS),linux)
        LOCAL_LDLIBS += -lrt -lpthread
    endif
endif

ifeq ($(BOARD_USE_LVMX),true)
    LOCAL_CFLAGS += -DLVMX
    LOCAL_C_INCLUDES += vendor/nxp
    LOCAL_STATIC_LIBRARIES += liblifevibes
    LOCAL_SHARED_LIBRARIES += liblvmxservice
#    LOCAL_SHARED_LIBRARIES += liblvmxipc
endif

include $(BUILD_SHARED_LIBRARY) 模塊三編譯成動態庫

(4)編譯一個應用程序(APK)

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # Build all java files in the java subdirectory-->直譯（建立在java子目錄中的所有Java文件）
  LOCAL_SRC_FILES := $(call all-subdir-java-files)
  # Name of the APK to build-->直譯（創建APK的名稱）
  LOCAL_PACKAGE_NAME := LocalPackage
  # Tell it to build an APK-->直譯（告訴它來建立一個APK）
  include $(BUILD_PACKAGE)

(5)編譯一個依賴於靜態Java庫(static.jar)的應用程序

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # List of static libraries to include in the package
  LOCAL_STATIC_JAVA_LIBRARIES := static-library
  # Build all java files in the java subdirectory
  LOCAL_SRC_FILES := $(call all-subdir-java-files)
  # Name of the APK to build
  LOCAL_PACKAGE_NAME := LocalPackage
  # Tell it to build an APK
  include $(BUILD_PACKAGE)

(6)編譯一個需要用平台的key簽名的應用程序

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # Build all java files in the java subdirectory
  LOCAL_SRC_FILES := $(call all-subdir-java-files)
  # Name of the APK to build
  LOCAL_PACKAGE_NAME := LocalPackage
  LOCAL_CERTIFICATE := platform
  # Tell it to build an APK
  include $(BUILD_PACKAGE)

(7)編譯一個需要用特定key前面的應用程序

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # Build all java files in the java subdirectory
  LOCAL_SRC_FILES := $(call all-subdir-java-files)
  # Name of the APK to build
  LOCAL_PACKAGE_NAME := LocalPackage
  LOCAL_CERTIFICATE := vendor/example/certs/app
  # Tell it to build an APK
  include $(BUILD_PACKAGE)

(8)添加一個預編譯應用程序

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # Module name should match apk name to be installed.
  LOCAL_MODULE := LocalModuleName
  LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
  LOCAL_MODULE_CLASS := APPS
  LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
  include $(BUILD_PREBUILT)

(9)添加一個靜態JAVA庫

  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  # Build all java files in the java subdirectory
  LOCAL_SRC_FILES := $(call all-subdir-java-files)
  # Any libraries that this library depends on
  LOCAL_JAVA_LIBRARIES := android.test.runner
  # The name of the jar file to create
  LOCAL_MODULE := sample
  # Build a static jar file.
  include $(BUILD_STATIC_JAVA_LIBRARY)
(10)Android.mk的編譯模塊中間可以定義相關的編譯內容，也就是指定相關的變量如下：

LOCAL_AAPT_FLAGS
LOCAL_ACP_UNAVAILABLE
LOCAL_ADDITIONAL_JAVA_DIR
LOCAL_AIDL_INCLUDES
LOCAL_ALLOW_UNDEFINED_SYMBOLS
LOCAL_ARM_MODE
LOCAL_ASFLAGS
LOCAL_ASSET_DIR
LOCAL_ASSET_FILES 在Android.mk文件中編譯應用程序(BUILD_PACKAGE)時設置此變量，表示資源文件，
                  通常會定義成LOCAL_ASSET_FILES += $(call find-subdir-assets)
LOCAL_BUILT_MODULE_STEM 
LOCAL_C_INCLUDES 額外的C/C++編譯頭文件路徑，用LOCAL_PATH表示本文件所在目錄
                 舉例如下：
                 LOCAL_C_INCLUDES += extlibs/zlib-1.2.3
                 LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
LOCAL_CC 指定C編譯器
LOCAL_CERTIFICATE  簽名認證
LOCAL_CFLAGS 為C/C++編譯器定義額外的標志(如宏定義)，舉例：LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1
LOCAL_CLASSPATH
LOCAL_COMPRESS_MODULE_SYMBOLS
LOCAL_COPY_HEADERS install應用程序時需要復制的頭文件，必須同時定義LOCAL_COPY_HEADERS_TO
LOCAL_COPY_HEADERS_TO install應用程序時復制頭文件的目的路徑
LOCAL_CPP_EXTENSION 如果你的C++文件不是以cpp為文件後綴，你可以通過LOCAL_CPP_EXTENSION指定C++文件後綴名
                    如：LOCAL_CPP_EXTENSION := .cc
                    注意統一模塊中C++文件後綴必須保持一致。
LOCAL_CPPFLAGS 傳遞額外的標志給C++編譯器，如：LOCAL_CPPFLAGS += -ffriend-injection
LOCAL_CXX 指定C++編譯器
LOCAL_DX_FLAGS
LOCAL_EXPORT_PACKAGE_RESOURCES
LOCAL_FORCE_STATIC_EXECUTABLE 如果編譯的可執行程序要進行靜態鏈接(執行時不依賴於任何動態庫)，則設置LOCAL_FORCE_STATIC_EXECUTABLE:=true
                              目前只有libc有靜態庫形式，這個只有文件系統中/sbin目錄下的應用程序會用到，這個目錄下的應用程序在運行時通常
                              文件系統的其它部分還沒有加載，所以必須進行靜態鏈接。
LOCAL_GENERATED_SOURCES
LOCAL_INSTRUMENTATION_FOR
LOCAL_INSTRUMENTATION_FOR_PACKAGE_NAME
LOCAL_INTERMEDIATE_SOURCES
LOCAL_INTERMEDIATE_TARGETS
LOCAL_IS_HOST_MODULE
LOCAL_JAR_MANIFEST
LOCAL_JARJAR_RULES
LOCAL_JAVA_LIBRARIES 編譯java應用程序和庫的時候指定包含的java類庫，目前有core和framework兩種
                     多數情況下定義成：LOCAL_JAVA_LIBRARIES := core framework
                     注意LOCAL_JAVA_LIBRARIES不是必須的，而且編譯APK時不允許定義(系統會自動添加)
LOCAL_JAVA_RESOURCE_DIRS
LOCAL_JAVA_RESOURCE_FILES
LOCAL_JNI_SHARED_LIBRARIES
LOCAL_LDFLAGS 傳遞額外的參數給連接器(務必注意參數的順序)
LOCAL_LDLIBS 為可執行程序或者庫的編譯指定額外的庫，指定庫以"-lxxx"格式，舉例：
             LOCAL_LDLIBS += -lcurses -lpthread
             LOCAL_LDLIBS += -Wl,-z,origin
LOCAL_MODULE 生成的模塊的名稱(注意應用程序名稱用LOCAL_PACKAGE_NAME而不是LOCAL_MODULE)
LOCAL_MODULE_PATH 生成模塊的路徑
LOCAL_MODULE_STEM
LOCAL_MODULE_TAGS 生成模塊的標記
LOCAL_NO_DEFAULT_COMPILER_FLAGS
LOCAL_NO_EMMA_COMPILE
LOCAL_NO_EMMA_INSTRUMENT
LOCAL_NO_STANDARD_LIBRARIES
LOCAL_OVERRIDES_PACKAGES
LOCAL_PACKAGE_NAME APK應用程序的名稱
LOCAL_POST_PROCESS_COMMAND
LOCAL_PREBUILT_EXECUTABLES 預編譯including $(BUILD_PREBUILT)或者$(BUILD_HOST_PREBUILT)時所用,指定需要復制的可執行文件
LOCAL_PREBUILT_JAVA_LIBRARIES
LOCAL_PREBUILT_LIBS 預編譯including $(BUILD_PREBUILT)或者$(BUILD_HOST_PREBUILT)時所用, 指定需要復制的庫.
LOCAL_PREBUILT_OBJ_FILES
LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES 
LOCAL_PRELINK_MODULE 是否需要預連接處理(默認需要，用來做動態庫優化)
LOCAL_REQUIRED_MODULES 指定模塊運行所依賴的模塊(模塊安裝時將會同步安裝它所依賴的模塊)
LOCAL_RESOURCE_DIR
LOCAL_SDK_VERSION
LOCAL_SHARED_LIBRARIES 可鏈接動態庫
LOCAL_SRC_FILES 編譯源文件
LOCAL_STATIC_JAVA_LIBRARIES
LOCAL_STATIC_LIBRARIES 可鏈接靜態庫
LOCAL_UNINSTALLABLE_MODULE
LOCAL_UNSTRIPPED_PATH
LOCAL_WHOLE_STATIC_LIBRARIES 指定模塊所需要載入的完整靜態庫(這些精通庫在鏈接是不允許鏈接器刪除其中無用的代碼)
LOCAL_YACCFLAGS
OVERRIDE_BUILT_MODULE_PATH