The LOCAL_SRC_FILES for a prebuilt library should only contain one item
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := cocos_crypto_static LOCAL_MODULE_FILENAME := crypto LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libcrypto.a LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../include/android include $(PREBUILT_STATIC_LIBRARY) LOCAL_MODULE := cocos_ssl_static LOCAL_MODULE_FILENAME := ssl LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libssl.a LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../include/android include $(PREBUILT_STATIC_LIBRARY)
CPU架构
1、armeabi-v7a: 第7代及以上的 32位ARM 处理器
2、arm64-v8a: 第8代、64位ARM处理器
3、armeabi: 第5代、第6代的32位ARM处理器，早期的手机在使用，现在基本很少了。
4、x86: Intel 32位处理器，在平板、模拟器用得比较多。
5、x86_64: Intel 64位处理器，在平板、模拟器用得比较多。
| ABI | 三元组 |
| armeabi-v7a | armv7a-linux-androideabi |
| arm64-v8a | aarch64-linux-android |
| x86 | i686-linux-android |
| x86-64 | x86_64-linux-android |
| NDK 操作系统变体 | 主机标记 |
| macOS | darwin-x86_64 |
| Linux | linux-x86_64 |
| 64 位 Windows | windows-x86_64 |
AArch64是ARMv8的一种执行状态。
若要使用 API 级别 21 的 minSdkVersion 针对 64 位 ARM Android 进行编译，可使用以下两种方法，您可以选择其中最方便的一种：
$ $NDK/toolchains/llvm/prebuilt/$HOST_TAG/bin/clang++ \ -target aarch64-linux-android21 foo.cpp
$ $NDK/toolchains/llvm/prebuilt/$HOST_TAG/bin/aarch64-linux-android21-clang++ \ foo.cpp
正确的写法是
#32bit ARCH=arm CPU=armv7-a #64bit ARCH=arm64 CPU=armv8-a
Error while executing process F:\android-ndk-r15c\ndk-build.cmd with arguments { NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=E:\proj\tank5\client\frameworks\runtime-src\proj.android-studio\app\jni\Android.mk NDK_APPLICATION_MK=E:\proj\tank5\client\frameworks\runtime-src\proj.android-studio\app\jni\Application.mk APP_ABI=armeabi NDK_ALL_ABIS=armeabi NDK_DEBUG=0 APP_PLATFORM=android-14 NDK_OUT=E:/proj/tank5/client/frameworks/runtime-src/proj.android-studio/app/build/intermediates/ndkBuild/release/obj NDK_LIBS_OUT=E:\proj\tank5\client\frameworks\runtime-src\proj.android-studio\app\build\intermediates\ndkBuild\release\lib NDK_TOOLCHAIN_VERSION=4.9 APP_PLATFORM=android-10 NDK_MODULE_PATH= E:/proj/tank5/client/frameworks/runtime-src/Classes; E:/proj/tank5/client/frameworks/cocos2d-x; E:/proj/tank5/client/frameworks/cocos2d-x/cocos; E:/proj/tank5/client/frameworks/cocos2d-x/external NDK_DEBUG=0 clean } Android NDK: android-10 is unsupported. Using minimum supported version android-14. Android NDK: WARNING: Ignoring unknown import directory: my_relative_path Android NDK: ERROR:E:/proj/tank5/client/frameworks/cocos2d-x/external/ffmpeg/prebuilt/android/Android.mk:cocos_ffmpeg_libavcodec: LOCAL_SRC_FILES points to a missing file Android NDK: Check that E:/proj/tank5/client/frameworks/cocos2d-x/external/ffmpeg/prebuilt/android/armeabi/libavcodec.a exists or that its path is correct F:/android-ndk-r15c/build//../build/core/prebuilt-library.mk:45: *** Android NDK: Aborting . Stop.
ninja: error:xxx, needed by xxx, missing and no known rule to make it
ninja: error: '/XXX/NDKApplication/app/src/main/cpp/src/main/cpp/armeabi-v7a/libavcodec.so', needed by '/XXX/NDKApplication/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libhf_code.so', missing and no known rule to make it
检查IMPORTED_LOCATION，底层不会自动补全lib，所以必须是存在的值
set_target_properties(${lib} PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_LIST_DIR}/lib${lib}.so # ↑ 底层不会补全这个lib )
ndk build android.mk添加外部so
- jni/Android.mk
LOCAL_SHARED_LIBRARIES += cocos_ffmpeg_libavformat # ... $(call import-add-path,$(LOCAL_PATH)) # 模块查找路径 $(call import-module,ffmpeg/)
- ffmpeg/Android.mk
include $(CLEAR_VARS) LOCAL_MODULE := cocos_ffmpeg_libavformat LOCAL_MODULE_FILENAME := libavformat # 注意这个名字，要和下边的对应 LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libavformat.so # 注意这个名字，要和上边的对应 LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../include include $(PREBUILT_SHARED_LIBRARY)
最终apk包里面会有这个文件: apk/lib/arm64-v8a/libavformat.so
Execution failed for task: externalNativeBuildDebug FAILED
有可能是编译so的ndk版本高于了项目使用的ndk版本
project ndk version >= so ndk version
ndk Unexpected native build target Valid values are:
so库有问题
externalNativeBuild { ndkBuild { if (!project.hasProperty("PROP_NDK_MODE") || PROP_NDK_MODE.compareTo('none') != 0) { // skip the NDK Build step if PROP_NDK_MODE is none targets 'cocos2dlua' arguments 'NDK_TOOLCHAIN_VERSION=4.9' arguments 'APP_PLATFORM=android-' + PROP_APP_PLATFORM def module_paths = [project.file("../../Classes").absolutePath, project.file("../../../cocos2d-x").absolutePath, project.file("../../../cocos2d-x/cocos").absolutePath, project.file("../../../cocos2d-x/external").absolutePath] if (Os.isFamily(Os.FAMILY_WINDOWS)) { // should use '/' module_paths = module_paths.collect { it.replaceAll('\\', '/') } arguments 'NDK_MODULE_PATH=' + module_paths.join(";") } else { arguments 'NDK_MODULE_PATH=' + module_paths.join(':') } arguments '-j' + Runtime.runtime.availableProcessors() abiFilters.addAll(PROP_APP_ABI.split(':').collect { it as String }) } } }
- gradlew.properties
PROP_APP_ABI=armeabi:armeabi-v7a:arm64-v8a
如果PROP_APP_ABI缺失arm64-v8a就会被过滤掉，build.gradle里面abiFilter就是写了arm64-v8a也没用，项目配置的一个大坑！
