【润和软件DAYU200开发板体验】移植speexdsp到OpenHarmony标准系统③

本文来源电子发烧友社区，作者：离北况归， 帖子地址：https://bbs.elecfans.com/jishu_2308797_1_1.html 由于想要分享的内容较多，为避免读者姥爷们失去看下去的耐心，分享将以连载的方式进行。 下期预告:在OpenHarmony的编译体系下编译speexdsp的so和测试用的可执行文件,以及编译报错的解决办法。 本期为移植speexdsp到OpenHarmony标准系统的第③期，主要内容如下： speexdsp移植后已提交至openhamrony sig仓库：https://gitee.com/openharmony-sig/contest/tree/master/2022_OpenHarmony_thirdparty/speexdsp 四、将三方库加入到OpenHarmony的编译体系 根据上一步分析结果，编写gn文件，将三方库加入到OpenHarmony的编译体系。 OpenHarmony编译构建子系统提供了一个基于Gn和ninja的编译构建框架。根据产品配置，编译生成对应的镜像包。其中编译构建流程为： 使用Gn配置构建目标。 Gn运行后会生成ninja文件。 通过运行ninja来执行编译任务。 OpenHarmony三方库编译环境搭建 本次移植时在openharmony3.2Beta1版本上运行的，所以需要准备openharmony3.2Beta1的源码。 先在Widows上安装虚拟机，在虚拟机上安装Ubuntu18.04或者20.04。笔者使用的为Ubuntu20.04。 1.将Ubuntu Shell环境修改为bash 打开终端执行 sudo dpkg-reconfigure dash 将Shell由dash改为bash。 选择<否> 更改成功如下： 2.下载华为集成开发环境 DevEco Device Tool Linux版本，目前最新版本号为3.1.0.200 HUAWEI DevEco Device Tool（以下简称DevEco Device Tool）是OpenHarmony面向智能设备开发者提供的一站式集成开发环境，支持OpenHarmony的组件按需定制，支持代码编辑、编译、烧录和调试等功能，支持C/C++语言，以插件的形式部署在Visual Studio Code上。 直接在Ubuntu上打开firefox输入下载地址下载 解压DevEco Device Tool安装包，并对解压后的文件赋权 unzip devicetool-linux-tool-3.1.0.200.zip chmod u+x devicetool-linux-tool-3.1.0.200.sh 安装DevEco Device 执行命令安装DevEco Device sudo ./devicetool-linux-tool-3.1.0.200.sh 终端打印出这条信息说明安装成功 3.获取标准系统源码 执行命令sudo apt-get install git git-lfs安装git客户端和git-lfs 配置git用户信息 git config --global user.name "yourname" git config --global user.email "your-email-address" git config --global credential.helper store git config --global credential.helper store执行这个命令会在本地生成一个文本，上边记录配置。然后再拉取代码就不用再输入账号信息了。 进入gitee官网个人主页，个人头像下方就是user.name 再进入设置点击邮箱管理就可以得到你的your-email-address 安装gitee码云repo工具 sudo apt-get install curl sudo curl https://gitee.com/oschina/repo/raw/fork_flow/repo-py3 -o /usr/local/bin/repo sudo chmod a+x /usr/local/bin/repo sudo pip3 install -i https://repo.huaweicloud.com/repository/pypi/simple requests 使用repo+https下载发布Tag节点源码 创建源码存放目录 进入创建的源码存放目录，执行以下命令下载源码 sudo ln -sf /usr/bin/python3 /usr/bin/python repo init -u https://gitee.com/openharmony/manifest -b refs/tags/OpenHarmony-v3.2-Beta1 --no-repo-verify repo sync -c repo forall -c 'git lfs pull' 3.在源码目录下执行脚本安装编译器及二进制工具 下载的prebuilts二进制默认存放在与OpenHarmony同目录下的OpenHarmony_2.0_canary_prebuilts下。 bash build/prebuilts_download.sh 4.安装依赖工具 sudo apt-get install binutils git git-lfs gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev ccache libgl1-mesa-dev libxml2-utils xsltproc unzip m4 bc gnutls-bin python3.8 python3-pip ruby 5.最后测试一下OpenHarmony三方库编译环境 在源码根目录下执行编译命令 ./build.sh --product-name rk3568 --ccache --build-target=要编译的部件名 --target-cpu arm64 #其中：--product-name rk3568 指定产品名为rk3568 #其中：--ccache 编译使用ccache #其中：--target-cpu arm64 编译构建64位系统 在源码目录下执行编译zlib命令，生成libzlib.z.so ./build.sh --product-name rk3568 --ccache --build-target=zlib 编译生成了libzlib.z.so，编译环境没问题。 配置speexdsp源码 下载完openharmony3.2Beta1源码后，将speexdsp的源码拷贝到openhamony的third_party目录下。 在OpenHarmony/sources/third_party/speexdsp和OpenHarmony/sources/third_party/speexdsp/libspeexdsp下分别编写一份BUILD.gn文件，完成speexdsp的gn及测试用例的gn化。测试用例指的是测试speexdsp功能的程序。 speexdsp编译gn化,新增工程构建脚本。 OpenHarmony/sources/third_party/speexdsp下添加BUILD.gn脚本文件。 OpenHarmony/sources/third_party/speexdsp/BUILD.gn内容如下： import("//build/ohos.gni") config("speexdsp_nowarn_config"){ cflags = [ "-Wno-implicit-function-declaration", "-Wno-pointer-sign", "-Wno-unused-variable", ] } config("speexdsp_cflag_config"){ cflags = [ "-g", "-O2", "-fvisibility=hidden", "-DHAVE_CONFIG_H", ] ldflags = [ "-lm" ] } ohos_shared_library("speexdsp_share") { sources = [ "libspeexdsp/preprocess.c", "libspeexdsp/jitter.c", "libspeexdsp/mdf.c", "libspeexdsp/fftwrap.c", "libspeexdsp/filterbank.c", "libspeexdsp/resample.c", "libspeexdsp/buffer.c", "libspeexdsp/scal.c", "libspeexdsp/smallft.c", ] defines = [ "NL_DEBUG", "speexdsp_EXPORTS", ] configs = [ ":speexdsp_cflag_config", ":speexdsp_nowarn_config" ] include_dirs = [ ".", "libspeexdsp", "include" ] part_name = "speexdsp" } 代码解析 第一行： import("//build/ohos.gni") import函数将ohos.gni文件导入到当前作用域。导入的文件是独立执行的，生成的作用域被复制到当前文件中。一个.gni文件会定义构建参数和模板。build目录下ohos.gni文件内容如下 import("//build/config/sanitizers/sanitizers.gni") import("//build/ohos/ndk/ndk.gni") import("//build/ohos/notice/notice.gni") import("//build/ohos/sa_profile/sa_profile.gni") import("//build/ohos_var.gni") import("//build/toolchain/toolchain.gni") # import cxx base templates import("//build/templates/cxx/cxx.gni") if (support_jsapi) { import("//build/ohos/ace/ace.gni") import("//build/ohos/app/app.gni") } import("//build/templates/common/ohos_templates.gni") # import prebuilt templates import("//build/templates/cxx/prebuilt.gni") 第三行到第九行： config("speexdsp_nowarn_config"){ cflags = [ "-Wno-implicit-function-declaration", "-Wno-pointer-sign", "-Wno-unused-variable", ] } configs定义了该模块编译配置的环境变量speexdsp_nowarn_config，第24行ohos_shared_library定义了最终生成的模块名，这里代表此模块为最终生成libspeexdsp.z.so。所以在第五行到第七行中config中添加了编译libspeexdsp.z.so需要添加的编译器标志 但是"-Wno-implicit-function-declaration"、"-Wno-pointer-sign""、-Wno-unused-variable"并非是分析speexdsp原生库得来的cflag编译器标志。 而是后来在ohos上编译验证过程中，根据编译报错信息添加的。如果不添加它们，执行./build.sh --product-name rk3568 --ccache --build-target=speexdsp命令后，则无法编译生成openharmony上的运行的libspeexdsp.z.so库，会出现编译警告信息-W-implicit-function-declaration、-W-pointer-sign、-W-unused-variable。解决办法就是在gn化时添加cflag标志"-Wno-implicit-function-declaration"、"-Wno-pointer-sign""、-Wno-unused-variable"。 clang编译器警告消除： 1.出现警告的就是直接在-W后面加no，比如-Wimplicit-function-declaration改为 -Wno-implicit-function-declaration 2.还有另外的一种方法：-Wimplicit-function-declaration=no 第十一到第二十二行： config("speexdsp_cflag_config"){ cflags = [ "-g", "-O2", "-fvisibility=hidden", "-DHAVE_CONFIG_H", ] ldflags = [ "-lm" ] } configs定义了该模块编译配置的环境变量speexdsp_cflag_config，在第十三行到第十六行添加了编译需要添加的编译器标志 "-g","-O2","-fvisibility=hidden", "-DHAVE_CONFIG_H"。 "-g","-O2","-fvisibility=hidden"通过分析原生库config.log和makefile文件，具体请查看第二期内容。 "-DHAVE_CONFIG_H"通过分析执行build命令后编译ohos上speexdsp的so库报错信息得来 添加"-DHAVE_CONFIG_H"后仍然有报错信息，解决办法是把linux下编译speexdsp原生库./configure后生成的config.h放置在thrid_party/speexdsp下。 第二十四行到第五十二行： ohos_shared_library("speexdsp_share") { sources = [ "libspeexdsp/preprocess.c", "libspeexdsp/jitter.c", "libspeexdsp/mdf.c", "libspeexdsp/fftwrap.c", "libspeexdsp/filterbank.c", "libspeexdsp/resample.c", "libspeexdsp/buffer.c", "libspeexdsp/scal.c", "libspeexdsp/smallft.c", ] defines = [ "NL_DEBUG", "speexdsp_EXPORTS", ] configs = [ ":speexdsp_cflag_config", ":speexdsp_nowarn_config" ] include_dirs = [ ".", "libspeexdsp", "include" ] part_name = "speexdsp" } 第24行ohos_shared_library定义了最终生成的模块名，这里代表此模块为最终生成libspeexdsp.z.so/动态库 如果是生成静态库ohos_static_library(" ") { } 第二十五行到第三十五行sources模块包含了需要编译的源码文件 第四十六行到五十行include_dirs模块包含了编译依赖的头文件路径 第五十一行part_name 该模块编译依赖的编译子系统组件名。该配置项是为了模块最终生成的so文件能在系统编译完后自动拷贝到系统目录中。如果没有配置该项，系统编译完后是不会自动将生成的so文件拷贝到系统目录。 测试用例gn化，新增工程构建脚本 OpenHarmony/sources/third_party/speexdsp/libspeexdsp下添加BUILD.gn脚本文件。 import("//build/ohos.gni") config("test_nowarn_config"){ cflags = [ "-Wno-sign-compare", "-Wno-pointer-sign" ] } config("speexdsp_cflag_config") { ldflags = [ "-lm" ] cflags_cc = [ "-g", "-O2", "-fvisibility=hidden", ] } config("speexdsp_config") { include_dirs = [ "//third_party/speexdsp/include" ] } ohos_executable("testdenoise"){ public_configs = [ ":speexdsp_config", ":test_nowarn_config" ] sources = [ "testdenoise.c" ] configs = [ ":speexdsp_cflag_config", ] deps = [ "//third_party/speexdsp:speexdsp_share" ] part_name = "speexdsp" } ohos_executable("testecho"){ public_configs = [ ":speexdsp_config", ":test_nowarn_config" ] sources = [ "testecho.c" ] configs = [ ":speexdsp_cflag_config" ] deps = [ "//third_party/speexdsp:speexdsp_share" ] part_name = "speexdsp" } ohos_executable("testjitter"){ public_configs = [ ":speexdsp_config", ":test_nowarn_config" ] sources = [ "testjitter.c" ] configs = [ ":speexdsp_cflag_config" ] deps = [ "//third_party/speexdsp:speexdsp_share" ] part_name = "speexdsp" } ohos_executable("testresample"){ public_configs = [ ":speexdsp_config", ":test_nowarn_config" ] sources = [ "testresample.c" ] configs = [ ":speexdsp_cflag_config" ] deps = [ "//third_party/speexdsp:speexdsp_share" ] part_name = "speexdsp" } ohos_executable("testresample2"){ public_configs = [ ":speexdsp_config", ":test_nowarn_config" ] sources = [ "testresample2.c" ] configs = [ ":speexdsp_cflag_config" ] deps = [ "//third_party/speexdsp:speexdsp_share" ] part_name = "speexdsp" } 代码解析 测试用例gn化代码解析的内容与speexdsp编译gn化内容相似，这里不做重复解释，只补充以下几点。 测试用例是在ohos上测试libspeexdsp.z.so功能用的。 第28、48、68、88、108行：gn中的目标类型executable表示生成可执行文件testdenoise、testecho、testjitter、testresample、testresample2。 第41、61、81、101、121行：deps表示测试用例模块编译依赖其他模块,这里指的是测试用例的编译依赖。libspeexdsp.z.so库。 第45、65、85、105、125行：part_name表示测试用例模块编译依赖的编译子系统组件名。该配置项是为了模块最终生成的so文件能在系统编译完后自动拷贝到系统目录中。如果没有配置该项，系统编译完后是不会自动将生成的so文件拷贝到系统目录。 OpenHarmony/sources/third_party/speexdsp目录下添加ohos.build。 定义子系统并加入到编译框架 在系统源码根目录下创建一个目录作为子系统目录，子系统目录可创建在OpenHarmony源码目录任意位置。 本项目以third_party/speexdsp作为为子系统目录，子系统名字即为speexdsp。 子系统speexdsp目录下创建ohos.build文件，build构建时会先读取该文件。 "subsystem": "speexdsp", "parts": { "speexdsp": { "module_list": [ "//third_party/speexdsp/libspeexdsp:testdenoise", "//third_party/speexdsp/libspeexdsp:testecho", "//third_party/speexdsp/libspeexdsp:testjitter", "//third_party/speexdsp/libspeexdsp:testresample", "//third_party/speexdsp/libspeexdsp:testresample2" ], "inner_kits": [ ], "system_kits": [ ], "test_list": [ ] } } } build文件夹下的subsystem_config.json文件，主要包含子系统名称与路径信息，在preloader阶段被加载，根据子系统名称和路径信息查找该路径下的ohos.build文件。 其中需要包含module_list、inner_kits、system_kits、test_list四个部分的声明： module_list：部件包含的模块列表 inner_kits：部件提供其它部件的接口 system_kits：部件提供给生成应用的接口 test_list：部件对应模块的测试用例 修改build/subsystem_config.json，新增子系统定义。 在源码/build/subsystem_config.json中增加子系统选项,把子系统speexdsp配置到build/subsystem_config.json。 "speexdsp": { "path": "third_party/speexdsp", "name": "speexdsp" }, 注意：要求符合json语法规范，要在}前加,（如下图所示） 修改vendor/hihope/rk3568/config.json文件将speexdsp添加至rk3568开发板，在vendor目录下新增产品的定义。 将子系统及其组件加入产品定义中，以rk3568为例，产品定义文件在vendor/hihope/rk3568/config.json，需要将以下内容添加到config.json中： { "subsystem": "speexdsp", "components": [ { "component": "speexdsp", "features": [] } ] }, 下期分享内容:在OpenHarmony的编译体系下编译speexdsp的so和测试用的可执行文件,以及编译报错的解决办法 知识点附送 本文中知识点附送的内容并不和移植speexdsp到openharmony标准系统直接相关，仅作为拓展阅读的知识点，因此读者可以不作过细的了解。 gn generate ninja工具，在out目录下生成ninja编译文件*.ninja，gn的可执行文件位置在prebuilts/build-tools/linux-x86目录里 jiajiahao@ubuntu:~/Desktop/OpenHarmony/sources/prebuilts/build-tools/linux-x86/bin$ ./gn --help Commands (type "gn help " for more help): analyze: Analyze which targets are affected by a list of files. args: Display or configure arguments declared by the build. check: Check header dependencies. clean: Cleans the output directory. desc: Show lots of insightful information about a target or config. format: Format .gn files. gen: Generate ninja files. help: Does what you think. ls: List matching targets. meta: List target metadata collection results. path: Find paths between two targets. refs: Find stuff referencing a target or file. Target declarations (type "gn help " for more help): action: Declare a target that runs a script a single time. action_foreach: Declare a target that runs a script over a set of files. bundle_data: [iOS/macOS] Declare a target without output. copy: Declare a target that copies files. create_bundle: [iOS/macOS] Build an iOS or macOS bundle. executable: Declare an executable target. generated_file: Declare a generated_file target. group: Declare a named group of targets. loadable_module: Declare a loadable module target. rust_library: Declare a Rust library target. rust_proc_macro: Declare a Rust procedural macro target. shared_library: Declare a shared library target. source_set: Declare a source set target. static_library: Declare a static library target. target: Declare an target with the given programmatic type. Buildfile functions (type "gn help " for more help): assert: Assert an expression is true at generation time. config: Defines a configuration object. declare_args: Declare build arguments. defined: Returns whether an identifier is defined. exec_script: Synchronously run a script and return the output. foreach: Iterate over a list. forward_variables_from: Copies variables from a different scope. get_label_info: Get an attribute from a target's label. get_path_info: Extract parts of a file or directory name. get_target_outputs: [file list] Get the list of outputs from a target. getenv: Get an environment variable. import: Import a file into the current scope. not_needed: Mark variables from scope as not needed. pool: Defines a pool object. print: Prints to the console. process_file_template: Do template expansion over a list of files. read_file: Read a file into a variable. rebase_path: Rebase a file or directory to another location. set_default_toolchain: Sets the default toolchain name. set_defaults: Set default values for a target type. set_sources_assignment_filter: Set a pattern to filter source files. split_list: Splits a list into N different sub-lists. string_join: Concatenates a list of strings with a separator. string_replace: Replaces substring in the given string. string_split: Split string into a list of strings. template: Define a template rule. tool: Specify arguments to a toolchain tool. toolchain: Defines a toolchain. write_file: Write a file to disk. Built-in predefined variables (type "gn help " for more help): current_cpu: [string] The processor architecture of the current toolchain. current_os: [string] The operating system of the current toolchain. current_toolchain: [string] Label of the current toolchain. default_toolchain: [string] Label of the default toolchain. gn_version: [number] The version of gn. host_cpu: [string] The processor architecture that GN is running on. host_os: [string] The operating system that GN is running on. invoker: [string] The invoking scope inside a template. python_path: [string] Absolute path of Python. root_build_dir: [string] Directory where build commands are run. root_gen_dir: [string] Directory for the toolchain's generated files. root_out_dir: [string] Root directory for toolchain output files. target_cpu: [string] The desired cpu architecture for the build. target_gen_dir: [string] Directory for a target's generated files. target_name: [string] The name of the current target. target_os: [string] The desired operating system for the build. target_out_dir: [string] Directory for target output files. Variables you set in targets (type "gn help " for more help): aliased_deps: [scope] Set of crate-dependency pairs. all_dependent_configs: [label list] Configs to be forced on dependents. allow_circular_includes_from: [label list] Permit includes from deps. arflags: [string list] Arguments passed to static_library archiver. args: [string list] Arguments passed to an action. asmflags: [string list] Flags passed to the assembler. assert_no_deps: [label pattern list] Ensure no deps on these targets. bundle_contents_dir: Expansion of {{bundle_contents_dir}} in create_bundle. bundle_deps_filter: [label list] A list of labels that are filtered out. bundle_executable_dir: Expansion of {{bundle_executable_dir}} in create_bundle bundle_resources_dir: Expansion of {{bundle_resources_dir}} in create_bundle. bundle_root_dir: Expansion of {{bundle_root_dir}} in create_bundle. cflags: [string list] Flags passed to all C compiler variants. cflags_c: [string list] Flags passed to the C compiler. cflags_cc: [string list] Flags passed to the C++ compiler. cflags_objc: [string list] Flags passed to the Objective C compiler. cflags_objcc: [string list] Flags passed to the Objective C++ compiler. check_includes: [boolean] Controls whether a target's files are checked. code_signing_args: [string list] Arguments passed to code signing script. code_signing_outputs: [file list] Output files for code signing step. code_signing_script: [file name] Script for code signing. code_signing_sources: [file list] Sources for code signing step. complete_static_lib: [boolean] Links all deps into a static library. configs: [label list] Configs applying to this target or config. contents: Contents to write to file. crate_name: [string] The name for the compiled crate. crate_root: [string] The root source file for a binary or library. crate_type: [string] The type of linkage to use on a shared_library. data: [file list] Runtime data file dependencies. data_deps: [label list] Non-linked dependencies. data_keys: [string list] Keys from which to collect metadata. defines: [string list] C preprocessor defines. depfile: [string] File name for input dependencies for actions. deps: [label list] Private linked dependencies. externs: [scope] Set of Rust crate-dependency pairs. framework_dirs: [directory list] Additional framework search directories. frameworks: [name list] Name of frameworks that must be linked. friend: [label pattern list] Allow targets to include private headers. include_dirs: [directory list] Additional include directories. inputs: [file list] Additional compile-time dependencies. ldflags: [string list] Flags passed to the linker. lib_dirs: [directory list] Additional library directories. libs: [string list] Additional libraries to link. metadata: [scope] Metadata of this target. output_conversion: Data format for generated_file targets. output_dir: [directory] Directory to put output file in. output_extension: [string] Value to use for the output's file extension. output_name: [string] Name for the output file other than the default. output_prefix_override: [boolean] Don't use prefix for output name. outputs: [file list] Output files for actions and copy targets. partial_info_plist: [filename] Path plist from asset catalog compiler. pool: [string] Label of the pool used by the action. precompiled_header: [string] Header file to precompile. precompiled_header_type: [string] "gcc" or "msvc". precompiled_source: [file name] Source file to precompile. product_type: [string] Product type for Xcode projects. public: [file list] Declare public header files for a target. public_configs: [label list] Configs applied to dependents. public_deps: [label list] Declare public dependencies. rebase: [boolean] Rebase collected metadata as files. response_file_contents: [string list] Contents of .rsp file for actions. script: [file name] Script file for actions. sources: [file list] Source files for a target. testonly: [boolean] Declares a target must only be used for testing. visibility: [label list] A list of labels that can depend on a target. walk_keys: [string list] Key(s) for managing the metadata collection walk. write_runtime_deps: Writes the target's runtime_deps to the given path. xcode_extra_attributes: [scope] Extra attributes for Xcode projects. xcode_test_application_name: [string] Name for Xcode test target. Other help topics: all: Print all the help at once buildargs: How build arguments work. dotfile: Info about the toplevel .gn file. execution: Build graph and execution overview. grammar: Language and grammar for GN build files. input_conversion: Processing input from exec_script and read_file. label_pattern: Matching more than one label. labels: About labels. metadata_collection: About metadata and its collection. ninja_rules: How Ninja build rules are named. nogncheck: Annotating includes for checking. output_conversion: Specifies how to transform a value to output. runtime_deps: How runtime dependency computation works. source_expansion: Map sources to outputs for scripts. switches: Show available command-line switches. ninja ninja构建工具，编译时根据gn生成的*.ninja文件进行编译构建，ninjiad的可执行文件位置在prebuilts/build-tools/linux-x86目录里 jiajiahao@ubuntu:~/Desktop/OpenHarmony/sources/prebuilts/build-tools/linux-x86/bin$ ./ninja --help usage: ninja [options] [targets...] if targets are unspecified, builds the 'default' target (see manual). options: --version print ninja version ("1.10.1") -v, --verbose show all command lines while building -C DIR change to DIR before doing anything else -f FILE specify input build file [default=build.ninja] -j N run N jobs in parallel (0 means infinity) [default=18 on this system] -k N keep going until N jobs fail (0 means infinity) [default=1] -l N do not start new jobs if the load average is greater than N -n dry run (don't run commands but act like they succeeded) -d MODE enable debugging (use '-d list' to list modes) -t TOOL run a subtool (use '-t list' to list subtools) terminates toplevel options; further flags are passed to the tool -w FLAG adjust warnings (use '-w list' to list warnings) 关于deps、external_deps的使用 在添加一个模块的时候，需要在BUILD.gn中声明它的依赖，为了便于后续处理部件间依赖关系，我们将依赖分为两种——部件内依赖deps和部件间依赖external_deps。 依赖分类： 如上图所示，主要分为部件内依赖（图左）和部件间依赖（图右）。 部件内依赖： 现有模块module1属于部件part1，要添加一个属于部件part1的模块module2，module2依赖于module1，这种情况就属于部件内依赖。 部件间依赖： 现有模块module1属于部件part1，要添加一个模块module2，module2依赖于module1，module2属于部件part2。模块module2与模块module1分属于两个不同的部件，这种情况就属于部件间依赖。 部件内依赖示例： import("//build/ohos.gni") ohos_shared_library("module1") { …… part_name = "part1" # 必选，所属部件名称 …… } import("//build/ohos.gni") ohos_shared_library("module2") { …… deps = [ "module1的gn target", …… ] # 部件内模块依赖 part_name = "part1" # 必选，所属部件名称 } 部件间依赖示例： import("//build/ohos.gni") ohos_shared_library("module1") { …… part_name = "part1" # 必选，所属部件名称 …… } import("//build/ohos.gni") ohos_shared_library("module2") { …… external_deps = [ "part1:module1", …… ] # 部件间模块依赖，这里依赖的模块必须是依赖的部件声明在inner_kits中的模块 part_name = "part2" # 必选，所属部件名称 } 注意：部件间依赖要写在external_deps里面，格式为”部件名:模块名"的形式，并且依赖的模块必须是依赖的部件声明在inner_kits中的模块。 查看.ninja_log文件可以知道每个模块编译的开始和结束时间 out/rk3568/.ninja_log文件记录了每个模块编译的开始和结束时间(ms)，结束时间和开始时间间隔越短表示模块的编译时间越短，编译性能越高。 从左到右分别表示：start time|end time|mtime|command hash。 mtime（modify time）显示的是文件内容被修改的最后时间