一文看懂Android.bp和Androd.mk区别以及宏变量对应关系
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目录
一、区别
- android.bp --> Soong --> Ninja
- Makefile or Android.mk --> kati --> Ninja
最终都是生成Ninja格式文件进行编译。
相关概念：
- ninja是一个编译框架，会根据相应的ninja格式的配置文件进行编译，但是ninja文件一般不会手动修改，而是通过将 Android.bp文件转换成ninja格式文件来编译
- Soong类似于之前的Makefile编译系统的核心，负责提供Android.bp语义解析，并将之转换成Ninja文件。
- Blueprint是生成、解析Android.bp的工具，是Soong的一部分。Soong负责Android编译而设计的工具，而Blueprint只是解析文件格式，Soong解析内容的具体含义。Blueprint和Soong都是由Golang写的项目，从Android 7.0，prebuilts/go/目录下新增Golang所需的运行环境，在编译时使用
- kati是专为Android开发的一个基于Golang和C++的工具，主要功能是把Android.mk文件转换成Ninja文件。代码路径是build/kati/，编译后的产物是ckati
二、mk转换为bp
Android.bp的出现就是为了替换Android.mk文件。bp跟mk文件不同，它是纯粹的配置，没有分支、循环等流程控制，不能做算数逻辑运算。如果需要控制逻辑，那么只能通过Go语言编写。旧的mk可以转换为bp，Soong会编译生成一个androidmk命令，用于将Android.mk文件转换为Android.bp文件。只针对简单的mk文件转换，涉及分支，循环等控制转换并不准确。即：
Android.mk --> Soong中androidmk --> Android.bp
三、宏变量对应关系
直接在"build/soong/androidmk/androidmk/android.go"文件中找：
var moduleTypes = map[string]string
"BUILD_SHARED_LIBRARY": "cc_library_shared",
"BUILD_STATIC_LIBRARY": "cc_library_static",
"BUILD_HOST_SHARED_LIBRARY": "cc_library_host_shared",
"BUILD_HOST_STATIC_LIBRARY": "cc_library_host_static",
"BUILD_HEADER_LIBRARY": "cc_library_headers",
"BUILD_EXECUTABLE": "cc_binary",
"BUILD_HOST_EXECUTABLE": "cc_binary_host",
"BUILD_NATIVE_TEST": "cc_test",
"BUILD_HOST_NATIVE_TEST": "cc_test_host",
"BUILD_NATIVE_BENCHMARK": "cc_benchmark",
"BUILD_HOST_NATIVE_BENCHMARK": "cc_benchmark_host",
"BUILD_JAVA_LIBRARY": "java_library_installable", // will be rewritten to java_library by bpfix
"BUILD_STATIC_JAVA_LIBRARY": "java_library",
"BUILD_HOST_JAVA_LIBRARY": "java_library_host",
"BUILD_HOST_DALVIK_JAVA_LIBRARY": "java_library_host_dalvik",
"BUILD_PACKAGE": "android_app",
"BUILD_RRO_PACKAGE": "runtime_resource_overlay",
"BUILD_CTS_EXECUTABLE": "cc_binary", // will be further massaged by bpfix depending on the output path
"BUILD_CTS_SUPPORT_PACKAGE": "cts_support_package", // will be rewritten to android_test by bpfix
"BUILD_CTS_PACKAGE": "cts_package", // will be rewritten to android_test by bpfix
"BUILD_CTS_TARGET_JAVA_LIBRARY": "cts_target_java_library", // will be rewritten to java_library by bpfix
"BUILD_CTS_HOST_JAVA_LIBRARY": "cts_host_java_library", // will be rewritten to java_library_host by bpfix
var prebuiltTypes = map[string]string
"SHARED_LIBRARIES": "cc_prebuilt_library_shared",
"STATIC_LIBRARIES": "cc_prebuilt_library_static",
"EXECUTABLES": "cc_prebuilt_binary",
"JAVA_LIBRARIES": "java_import",
"APPS": "android_app_import",
"ETC": "prebuilt_etc",
var rewriteProperties = map[string](func(variableAssignmentContext) error)
// custom functions
"LOCAL_32_BIT_ONLY": local32BitOnly,
"LOCAL_AIDL_INCLUDES": localAidlIncludes,
"LOCAL_ASSET_DIR": localizePathList("asset_dirs"),
"LOCAL_C_INCLUDES": localIncludeDirs,
"LOCAL_EXPORT_C_INCLUDE_DIRS": exportIncludeDirs,
"LOCAL_JARJAR_RULES": localizePath("jarjar_rules"),
"LOCAL_LDFLAGS": ldflags,
"LOCAL_MODULE_CLASS": prebuiltClass,
"LOCAL_MODULE_STEM": stem,
"LOCAL_MODULE_HOST_OS": hostOs,
"LOCAL_RESOURCE_DIR": localizePathList("resource_dirs"),
"LOCAL_SANITIZE": sanitize(""),
"LOCAL_SANITIZE_DIAG": sanitize("diag."),
"LOCAL_STRIP_MODULE": strip(),
"LOCAL_CFLAGS": cflags,
"LOCAL_UNINSTALLABLE_MODULE": invert("installable"),
"LOCAL_PROGUARD_ENABLED": proguardEnabled,
"LOCAL_MODULE_PATH": prebuiltModulePath,
"LOCAL_REPLACE_PREBUILT_APK_INSTALLED": prebuiltPreprocessed,
// composite functions
"LOCAL_MODULE_TAGS": includeVariableIf(bpVariable"tags", bpparser.ListType, not(valueDumpEquals("optional"))),
// skip functions
"LOCAL_ADDITIONAL_DEPENDENCIES": skip, // TODO: check for only .mk files?
"LOCAL_CPP_EXTENSION": skip,
"LOCAL_MODULE_SUFFIX": skip, // TODO
"LOCAL_PATH": skip, // Nothing to do, except maybe avoid the "./" in paths?
"LOCAL_PRELINK_MODULE": skip, // Already phased out
"LOCAL_BUILT_MODULE_STEM": skip,
"LOCAL_USE_AAPT2": skip, // Always enabled in Soong
"LOCAL_JAR_EXCLUDE_FILES": skip, // Soong never excludes files from jars
"LOCAL_ANNOTATION_PROCESSOR_CLASSES": skip, // Soong gets the processor classes from the plugin
"LOCAL_CTS_TEST_PACKAGE": skip, // Obsolete
"LOCAL_JACK_ENABLED": skip, // Obselete
"LOCAL_JACK_FLAGS": skip, // Obselete
func init()
addStandardProperties(bpparser.StringType,
map[string]string
"LOCAL_MODULE": "name",
"LOCAL_CXX_STL": "stl",
"LOCAL_MULTILIB": "compile_multilib",
"LOCAL_ARM_MODE_HACK": "instruction_set",
"LOCAL_SDK_VERSION": "sdk_version",
"LOCAL_MIN_SDK_VERSION": "min_sdk_version",
"LOCAL_NDK_STL_VARIANT": "stl",
"LOCAL_JAR_MANIFEST": "manifest",
"LOCAL_CERTIFICATE": "certificate",
"LOCAL_PACKAGE_NAME": "name",
"LOCAL_MODULE_RELATIVE_PATH": "relative_install_path",
"LOCAL_PROTOC_OPTIMIZE_TYPE": "proto.type",
"LOCAL_MODULE_OWNER": "owner",
"LOCAL_RENDERSCRIPT_TARGET_API": "renderscript.target_api",
"LOCAL_NOTICE_FILE": "notice",
"LOCAL_JAVA_LANGUAGE_VERSION": "java_version",
"LOCAL_INSTRUMENTATION_FOR": "instrumentation_for",
"LOCAL_MANIFEST_FILE": "manifest",
"LOCAL_DEX_PREOPT_PROFILE_CLASS_LISTING": "dex_preopt.profile",
"LOCAL_TEST_CONFIG": "test_config",
"LOCAL_RRO_THEME": "theme",
)
addStandardProperties(bpparser.ListType,
map[string]string
"LOCAL_SRC_FILES": "srcs",
"LOCAL_SRC_FILES_EXCLUDE": "exclude_srcs",
"LOCAL_HEADER_LIBRARIES": "header_libs",
"LOCAL_SHARED_LIBRARIES": "shared_libs",
"LOCAL_STATIC_LIBRARIES": "static_libs",
"LOCAL_WHOLE_STATIC_LIBRARIES": "whole_static_libs",
"LOCAL_SYSTEM_SHARED_LIBRARIES": "system_shared_libs",
"LOCAL_ASFLAGS": "asflags",
"LOCAL_CLANG_ASFLAGS": "clang_asflags",
"LOCAL_COMPATIBILITY_SUPPORT_FILES": "data",
"LOCAL_CONLYFLAGS": "conlyflags",
"LOCAL_CPPFLAGS": "cppflags",
"LOCAL_REQUIRED_MODULES": "required",
"LOCAL_HOST_REQUIRED_MODULES": "host_required",
"LOCAL_TARGET_REQUIRED_MODULES": "target_required",
"LOCAL_OVERRIDES_MODULES": "overrides",
"LOCAL_LDLIBS": "host_ldlibs",
"LOCAL_CLANG_CFLAGS": "clang_cflags",
"LOCAL_YACCFLAGS": "yacc.flags",
"LOCAL_SANITIZE_RECOVER": "sanitize.recover",
"LOCAL_LOGTAGS_FILES": "logtags",
"LOCAL_EXPORT_HEADER_LIBRARY_HEADERS": "export_header_lib_headers",
"LOCAL_EXPORT_SHARED_LIBRARY_HEADERS": "export_shared_lib_headers",
"LOCAL_EXPORT_STATIC_LIBRARY_HEADERS": "export_static_lib_headers",
"LOCAL_INIT_RC": "init_rc",
"LOCAL_VINTF_FRAGMENTS": "vintf_fragments",
"LOCAL_TIDY_FLAGS": "tidy_flags",
// TODO: This is comma-separated, not space-separated
"LOCAL_TIDY_CHECKS": "tidy_checks",
"LOCAL_RENDERSCRIPT_INCLUDES": "renderscript.include_dirs",
"LOCAL_RENDERSCRIPT_FLAGS": "renderscript.flags",
"LOCAL_JAVA_RESOURCE_DIRS": "java_resource_dirs",
"LOCAL_JAVA_RESOURCE_FILES": "java_resources",
"LOCAL_JAVACFLAGS": "javacflags",
"LOCAL_ERROR_PRONE_FLAGS": "errorprone.javacflags",
"LOCAL_DX_FLAGS": "dxflags",
"LOCAL_JAVA_LIBRARIES": "libs",
"LOCAL_STATIC_JAVA_LIBRARIES": "static_libs",
"LOCAL_JNI_SHARED_LIBRARIES": "jni_libs",
"LOCAL_AAPT_FLAGS": "aaptflags",
"LOCAL_PACKAGE_SPLITS": "package_splits",
"LOCAL_COMPATIBILITY_SUITE": "test_suites",
"LOCAL_OVERRIDES_PACKAGES": "overrides",
"LOCAL_ANNOTATION_PROCESSORS": "plugins",
"LOCAL_PROGUARD_FLAGS": "optimize.proguard_flags",
"LOCAL_PROGUARD_FLAG_FILES": "optimize.proguard_flags_files",
// These will be rewritten to libs/static_libs by bpfix, after their presence is used to convert
// java_library_static to android_library.
"LOCAL_SHARED_ANDROID_LIBRARIES": "android_libs",
"LOCAL_STATIC_ANDROID_LIBRARIES": "android_static_libs",
"LOCAL_ADDITIONAL_CERTIFICATES": "additional_certificates",
// Jacoco filters:
"LOCAL_JACK_COVERAGE_INCLUDE_FILTER": "jacoco.include_filter",
"LOCAL_JACK_COVERAGE_EXCLUDE_FILTER": "jacoco.exclude_filter",
"LOCAL_FULL_LIBS_MANIFEST_FILES": "additional_manifests",
)
addStandardProperties(bpparser.BoolType,
map[string]string
// Bool properties
"LOCAL_IS_HOST_MODULE": "host",
"LOCAL_CLANG": "clang",
"LOCAL_FORCE_STATIC_EXECUTABLE": "static_executable",
"LOCAL_NATIVE_COVERAGE": "native_coverage",
"LOCAL_NO_CRT": "nocrt",
"LOCAL_ALLOW_UNDEFINED_SYMBOLS": "allow_undefined_symbols",
"LOCAL_RTTI_FLAG": "rtti",
"LOCAL_PACK_MODULE_RELOCATIONS": "pack_relocations",
"LOCAL_TIDY": "tidy",
"LOCAL_USE_CLANG_LLD": "use_clang_lld",
"LOCAL_PROPRIETARY_MODULE": "proprietary",
"LOCAL_VENDOR_MODULE": "vendor",
"LOCAL_ODM_MODULE": "device_specific",
"LOCAL_PRODUCT_MODULE": "product_specific",
"LOCAL_SYSTEM_EXT_MODULE": "system_ext_specific",
"LOCAL_EXPORT_PACKAGE_RESOURCES": "export_package_resources",
"LOCAL_PRIVILEGED_MODULE": "privileged",
"LOCAL_AAPT_INCLUDE_ALL_RESOURCES": "aapt_include_all_resources",
"LOCAL_DONT_MERGE_MANIFESTS": "dont_merge_manifests",
"LOCAL_USE_EMBEDDED_NATIVE_LIBS": "use_embedded_native_libs",
"LOCAL_USE_EMBEDDED_DEX": "use_embedded_dex",
"LOCAL_DEX_PREOPT": "dex_preopt.enabled",
"LOCAL_DEX_PREOPT_APP_IMAGE": "dex_preopt.app_image",
"LOCAL_DEX_PREOPT_GENERATE_PROFILE": "dex_preopt.profile_guided",
"LOCAL_PRIVATE_PLATFORM_APIS": "platform_apis",
"LOCAL_JETIFIER_ENABLED": "jetifier",
"LOCAL_IS_UNIT_TEST": "unit_test",
"LOCAL_ENFORCE_USES_LIBRARIES": "enforce_uses_libs",
)
四、常用宏变量作用
不断更新...记录常用但不好理解的
- LOCAL_PROPRIETARY_MODULE，proprietary：true控制生成路径到vendor/lib，false就是system/lib;
- LOCAL_CLANG，clang：true来指定默认编译器为Clang，Android 8.0后不需要指定，默认是Clang；
- -----------------------------------------------------alibli分割符-------------------------------------------------------
- LOCAL_SRC_FILES：当前模块包含的所有源代码文件
- LOCAL_MODULE：当前模块的名称，这个名称应当是唯一的，模块间的依赖关系就是通过这个名称来引用的
- LOCAL_C_INCLUDES：C 或 C++ 语言需要的头文件的路径
- LOCAL_STATIC_LIBRARIES：当前模块在静态链接时需要的库的名称
- LOCAL_SHARED_LIBRARIES：当前模块在运行时依赖的动态库的名称
- LOCAL_CFLAGS：提供给 C/C++ 编译器的额外编译参数
- LOCAL_JAVA_LIBRARIES：当前模块依赖的 Java 共享库
- LOCAL_STATIC_JAVA_LIBRARIES：当前模块依赖的 Java 静态库
- LOCAL_PACKAGE_NAME：当前 APK 应用的名称
- LOCAL_CERTIFICATE：签署当前应用的证书名称
- LOCAL_MODULE_PATH：指定输出路径
- LOCAL_PRIVILEGED_MODULE：指定生成的apk是否在system/priv-app/下，等同于设置LOCAL_MODULE_PATH := $(TARGET_OUT)/system/priv-app
- LOCAL_MODULE_TAGS：user/debug/eng/optional 指定该模块在什么版本下编译 optional 表示所有版本都编译
- -----------------------------------------------------alibli分割符-------------------------------------------------------
- BUILD_HOST_STATIC_LIBRARY：编译静态库（适用于主机）
- BUILD_HOST_SHARED_LIBRARY：编译动态库（适用于主机）
- BUILD_HOST_EXECUTABLE：编译可执行程序(适用于主机)
- BUILD_HOST_PREBUILT：预编译(适用于主机)
- BUILD_HOST_JAVA_LIBRARY：编译java包(适用于主机)
- BUILD_JAVA_LIBRARY：编译java包
- BUILD_STATIC_JAVA_LIBRARY：编译java静态包
- BUILD_STATIC_LIBRARY：编译静态库
- BUILD_SHARED_LIBRARY：编译动态库
- BUILD_EXECUTABLE：编译可执行程序
- BUILD_PACKAGE：编译apk
- BUILD_PREBUILT：预编译(针对单个预编译文件)
- BUILD_MULTI_PREBUILT：预编译(针对多个预编译文件)
- -----------------------------------------------------alibli分割符-------------------------------------------------------
LOCAL_SHARED_LIBRARIES、LOCAL_LDLIBS、LOCAL_LDFLAGS的区别：
LOCAL_SHARED_LIBRARIES 会生成依赖关系，当库不存在时会去编译这个库。
LOCAL_LDLIBS ：链接的库不产生依赖关系，一般用于不需要重新编译的库，如库不存在，则会报错找不到。且貌似只能链接那些存在于系统目录下本模块需要连接的库。如果某一个库既有动态库又有静态库，那么在默认情况下是链接的动态库而非静态库。
如：LOCAL_LDLIBS += -lm –lz –lc -lcutils –lutils –llog …
如果你的Android.mk文件中只有这么一行，那么将会采用动态链接。
LOCAL_LDFLAGS：这个编译变量传递给链接器一个一些额外的参数，比如想传递额外的库和库路径给ld，或者传递给ld linker的一些链接参数，-On，-ELB(大小端字节序)，那么就要加到这个上面，如：
LOCAL_LDFLAGS += -L$(LOCAL_PATH)/lib/ -lHWrecog –EBEL –On …
或者直接加上绝对路径库的全名：
LOCAL_LDFLAGS += $(LOCAL_PATH)/lib/libHWrecog.a –EBEL –On
如果是非系统的第三方库，貌似只能用LOCAL_LDFLAGS方式，LOCAL_LDLIBS方式不行。
部分参考优秀博客：
Android.mk常用宏定义 - 简书 (jianshu.com)
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