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android NDK编译多个so文件

2015-11-22 139hotness 0likes 0comments

android编译系统的makefile文件Android.mk写法如下

(1)Android.mk文件首先需要指定LOCAL_PATH变量,用于查找源文件。由于一般情况下

Android.mk和需要编译的源文件在同一目录下,所以定义成如下形式:

LOCAL_PATH:=$(call my-dir)

上面的语句的意思是将LOCAL_PATH变量定义成本文件所在目录路径。

(2)Android.mk中可以定义多个编译模块,每个编译模块都是以include $(CLEAR_VARS)开始

以include $(BUILD_XXX)结束。

include $(CLEAR_VARS)

CLEAR_VARS由编译系统提供,指定让GNU MAKEFILE为你清除除LOCAL_PATH以外的所有LOCAL_XXX变量,

如LOCAL_MODULE,LOCAL_SRC_FILES,LOCAL_SHARED_LIBRARIES,LOCAL_STATIC_LIBRARIES等。

include $(BUILD_STATIC_LIBRARY)表示编译成静态库

include $(BUILD_SHARED_LIBRARY)表示编译成动态库。

include $(BUILD_EXECUTABLE)表示编译成可执行程序

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

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)  模块一

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)  模块一编译成静态库

include $(CLEAR_VARS)  模块二

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) 模块二编译成静态库

include $(CLEAR_VARS) 模块三

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 libaudiopolicybas

Tag: Nothing
Last updated:2015-11-22

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