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【Android构建系统】Soong构建系统，通过.bp + .go定制编译

news 来源：原创 2025/5/20 6:21:00

背景介绍

本篇是一篇实操内容，是对【Android构建系统】如何在Camera Hal的Android.bp中选择性引用某个模块的优化与改进。本篇内容主要想通过一个具体例子介绍Soong构建系统较复杂的定制化方法和步骤，以便在今后的工作学习中更好的使用Soong构建系统。

【Android构建系统】如何在Camera Hal的Android.bp中选择性引用某个模块虽然达到了一定的选择效果，从实际使用角度来说

不好用不够灵活
定制化程度很受限
从项目维护角度来说，不够自动化

简短介绍到这里，下面介绍Android Soong构建系统如何实现更复杂的定制。

Soong构建系统(.bp + .go)定制化步骤

实现步骤：

创建一个.go文件，定义并注册自定义构建模块&处理函数
Android.bp中引用自定义的模块(.go)到soong构建系统（后边会补充些理解）
Android.bp中使用自定义.go中定义的模块
导出编译控制开关或者变量 (这步是根据实际需要可有可无)

实例:根据构建条件添加预编译宏CAMERA_ENABLE_HW_PROCESS

1.创建my_custom.go，定义并注册模块

//hardware/google/camera/devices/EmulatedCamera/hwl/my_custom.go
package my_customimport ("android/soong/android""android/soong/cc"
)func init() {android.RegisterModuleType("my_custom_defaults", customDefaultsFactory)
}func customDefaultFactory()(android.Module) {module := cc.DefaultsFactory()android.AddLoadHook(module, appendAospBuildParams)return module
}func appendAospBuildParams(ctx android.LoadHookContext) {type props struct {Cflags []string}p := &props{}p.Cflags = globalDefaults(ctx)ctx.AppendProperties(p)
}func globalDefaults(ctx android.BaseContext)([]string) {var cppflags []stringif ctx.AConfig().Getenv("ANDROIDBP_CUSTOM") == "YES" {cppflags = append(cppflags, "-DCAMERA_ENABLE_HW_PROCESS")}return cppflags
}

2.Android.bp中导入自定义的模块

//hardware/google/camera/devices/EmulatedCamera/hwl/Android.bp文件头添加如下，
bootstrap_go_package {                     //这里将自定义的构建模块加到Soong构建系统name: "soong-my_custom",pkgPath: "android/soong/my_custom",deps: ["blueprint","blueprint-pathtools","soong","soong-android","soong-cc","soong-genrule",],srcs: ["my_custom.go",],pluginFor: ["soong_build"],
}

3.Android.bp中引用自定义的模块

//hardware/google/camera/devices/EmulatedCamera/hwl/Android.bp
my_custom_defaults {name: "custom_cflags_defaults",
}cc_library_static {name: "libgooglecamera_process",owner: "google",proprietary: true,host_supported: false,srcs: ["a_wrapper.cpp","image_processor.cpp",],header_libs: ["libgui_aidl_headers","arm_gralloc_headers",],static_libs: ["vendor.hardware.camera.hwprocess",],shared_libs: ["libui","libdmabufheap",],include_dirs: ["system/media/private/camera/include","frameworks/native/libs/ui/include/","frameworks/native/include/","vendor/google/hardware/modules/gralloc/android/src","system/memdory/libdmabufheap/include","external/libyuv/include",],export_include_dirs: ["."],cflags: ["-Werror","-Wextra","-Wall",],target: {android_arm64: {enabled: true,},android_x86_64: {enabled: false,},},
}