android 预制32 64 位so， bin

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预制有源码和无源码32 ， 64 bit so bin 通过LOCAL_MODULE_TARGET_ARCHS 、 LOCAL_MULTILIB 控制

LOCAL_PATH := $(call my-dir)sources := \   tvini.c \   mmap.c \   spi.ccincludes := \   $(TARGET_OUT_HEADERS) \   $(TARGET_UTOPIA_LIBS_DIR)/include \    external/iniparser# libmutils.so# ==============================================================================include $(CLEAR_VARS)LOCAL_MODULE := libmutilsLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(sources)LOCAL_C_INCLUDES := $(cincludes)LOCAL_CFLAGS := -DMSOS_TYPE_LINUX-DENABLE_LOGGERLOCAL_SHARED_LIBRARIES := liblog libutopialibiniparser libcutilsWEWWWinclude $(BUILD_SHARED_LIBRARY)1
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对于有源码，只编译32 lib的so

LOCAL_PATH := $(call my-dir)sources := \   tvini.c \   mmap.c \   spi.ccincludes := \   $(TARGET_OUT_HEADERS) \   $(TARGET_UTOPIA_LIBS_DIR)/include \   external/iniparser# libmutils.so#==============================================================================include $(CLEAR_VARS)LOCAL_MODULE := libmutilsLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(sources)LOCAL_C_INCLUDES := $(cincludes)LOCAL_CFLAGS := -DMSOS_TYPE_LINUX-DENABLE_LOGGERLOCAL_SHARED_LIBRARIES := liblog libutopialibiniparser libcutilsLOCAL_32_BIT_ONLY := trueinclude $(BUILD_SHARED_LIBRARY)1
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或者采用下面的这种方法

LOCAL_PATH := $(call my-dir)sources := \   tvini.c \   mmap.c \   spi.ccincludes := \   $(TARGET_OUT_HEADERS) \   $(TARGET_UTOPIA_LIBS_DIR)/include \   external/iniparser# libmutils.so# ==============================================================================include $(CLEAR_VARS)LOCAL_MODULE := libmutilsLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(sources)LOCAL_C_INCLUDES := $(cincludes)LOCAL_CFLAGS := -DMSOS_TYPE_LINUX -DENABLE_LOGGERLOCAL_SHARED_LIBRARIES := liblog libutopialibiniparser libcutilsLOCAL_MODULE_TARGET_ARCH:= armLOCAL_MULTILIB := 32include $(BUILD_SHARED_LIBRARY)1
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对于有源码，但是只需要编译64 bit的so

LOCAL_PATH := $(call my-dir)sources := \   tvini.c \   mmap.c \   spi.ccincludes := \   $(TARGET_OUT_HEADERS) \   $(TARGET_UTOPIA_LIBS_DIR)/include \   external/iniparser# libmutils.so#==============================================================================include $(CLEAR_VARS)LOCAL_MODULE := libmutilsLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(sources)LOCAL_C_INCLUDES := $(cincludes)LOCAL_CFLAGS := -DMSOS_TYPE_LINUX-DENABLE_LOGGERLOCAL_SHARED_LIBRARIES := liblog libutopialibiniparser libcutilsLOCAL_MODULE_TARGET_ARCH:= arm64LOCAL_MULTILIB := 64include $(BUILD_SHARED_LIBRARY)1
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下面在说一下没有源码，预制so的方式
对于有32 跟64 bit so的东西，都想预制进入可以采用：

## libutopia.so##==============================================================================include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_MODULE_SUFFIX := .soLOCAL_MODULE := libutopiaLOCAL_MODULE_CLASS := SHARED_LIBRARIESLOCAL_SRC_FILES_arm :=lib/libutopia.soLOCAL_SRC_FILES_arm64 :=lib64/libutopia.soLOCAL_MODULE_TARGET_ARCHS:= arm arm64LOCAL_MULTILIB := bothinclude $(BUILD_PREBUILT)1
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如果只预制32 bit的so

## libutopia.so##==============================================================================include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_MODULE_SUFFIX := .soLOCAL_MODULE := libutopiaLOCAL_MODULE_CLASS := SHARED_LIBRARIESLOCAL_SRC_FILES_arm :=lib/libutopia.soLOCAL_MODULE_TARGET_ARCHS:= armLOCAL_MULTILIB := 32include $(BUILD_PREBUILT)1
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如果只想预制64 bit的so

## libutopia.so##==============================================================================include $(CLEAR_VARS)LOCAL_MODULE_TAGS := optionalLOCAL_MODULE_SUFFIX := .soLOCAL_MODULE := libutopiaLOCAL_MODULE_CLASS := SHARED_LIBRARIESLOCAL_SRC_FILES_arm64 :=lib64/libutopia.soLOCAL_MODULE_TARGET_ARCHS:= arm64LOCAL_MULTILIB := 64include $(BUILD_PREBUILT)1
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预置 apk，请参考下面的写法预置 apk
1，预置system app下的apk

define PREBUILT_system_apps_template include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_MODULE_CLASS := APPS LOCAL_CERTIFICATE := platform LOCAL_SRC_FILES := $$(LOCAL_MODULE)$(COMMON_ANDROID_PACKAGE_SUFFIX) include $(BUILD_PREBUILT)endef1
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2，预置system下的apk， force apk 跑 32 bit， libbluetooth_jni部分是一个32 bit的lib

define PREBUILT_system_apps_template_32only include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_MODULE_CLASS := APPS LOCAL_CERTIFICATE := platform LOCAL_SRC_FILES := $$(LOCAL_MODULE)$(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_MULTILIB := 32 LOCAL_JNI_SHARED_LIBRARIES := libbluetooth_jni include $(BUILD_PREBUILT)endef1
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3，预置system app，不用系统签名，用预签名

definePREBUILT_system_apps_template_32only_presigned include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX) LOCAL_MODULE_CLASS := APPS LOCAL_CERTIFICATE := PRESIGNED LOCAL_MULTILIB := 32 LOCAL_JNI_SHARED_LIBRARIES := libbluetooth_jni include $(BUILD_PREBUILT)endef1
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4，预置system vendor apk

define PREBUILT_vendor_apps_template include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH:= $(TARGET_OUT)/vendor/app LOCAL_CERTIFICATE := platform LOCAL_SRC_FILES := $(1).apk include $(BUILD_PREBUILT)endef1
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5，预置system vendor apk，并force 32 bit

define PREBUILT_vendor_apps_template_32only include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT)/vendor/app LOCAL_CERTIFICATE := platform LOCAL_SRC_FILES := $(1).apk LOCAL_MULTILIB := 32 LOCAL_JNI_SHARED_LIBRARIES := libbluetooth_jni include $(BUILD_PREBUILT)endef1
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6，预置data app下的apk，使用系统签名

define PREBUILT_data_apps_template include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS) LOCAL_CERTIFICATE := platform LOCAL_SRC_FILES := $(1).apk include $(BUILD_PREBUILT)endef1
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7，预置data app下的apk，使用预签名

definePREBUILT_data_apps_presigned_template include $(CLEAR_VARS) LOCAL_MODULE_TAGS := optional LOCAL_MODULE := $(1) LOCAL_MODULE_CLASS := APPS LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS) LOCAL_CERTIFICATE := PRESIGNED LOCAL_SRC_FILES := $(1).apk include $(BUILD_PREBUILT)endef1
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LOCAL_MODULE_TARGET_ARCH
设置成一个架构的列表，只有被构建的架构在列表中才会被构建系统添加进入当前模块。
LOCAL_MODULE_UNSUPPORTED_TARGET_ARCH
LOCAL_MODULE_TARGET_ARCH 的对立选项。
只有被构建的架构不在列表中才会被构建系统添加进入当前模块。

DEX预选择
LOCAL_MULTILIB := both
为APK预置32位和64位的odex ;

参考：http://blog.csdn.net/le_773/article/details/51714986

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