Android.bp條件編譯

一.概要

    我們修改代碼的時候經常會有一些共線的機器，我們隻想進指定的機器或者指定的分支，在Android.mk中可以直接使用if來做判斷，但是到了Android.bp中就無法在bp檔案中使用條件編譯了，本文将教會你怎麼讓bp檔案也支援條件編譯

二.Android.bp介紹

http://androidxref.com/9.0.0_r3/xref/frameworks/native/services/sensorservice/Android.bp

//cc_library_shared編譯的是lib cc_library_shared { // 子產品名字 name:  "libsensorservice" ,  // 依賴的源碼 srcs: [ "BatteryService.cpp" , "CorrectedGyroSensor.cpp" , "Fusion.cpp" , "GravitySensor.cpp" , "LinearAccelerationSensor.cpp" , "OrientationSensor.cpp" , "RecentEventLogger.cpp" , "RotationVectorSensor.cpp" , "SensorDevice.cpp" , "SensorDeviceUtils.cpp" , "SensorDirectConnection.cpp" , "SensorEventConnection.cpp" , "SensorFusion.cpp" , "SensorInterface.cpp" , "SensorList.cpp" , "SensorRecord.cpp" , "SensorService.cpp" , "SensorServiceUtils.cpp" , "EllipticFusionSensorManager/EllipticFusionSensorManager.cpp" , "EllipticFusionSensorManager/TableTopSensor.cpp" , "EllipticFusionSensorManager/ProximityFusionSensor.cpp" , "EllipticFusionSensorManager/SnapFusionSensor.cpp" , "EllipticFusionSensorManager/MuteFusionSensor.cpp" , "EllipticFusionSensorManager/PhoneMotionSensor.cpp" , "EllipticFusionSensorManager/ParseFusionSensorConfig.cpp" , "SensorControl.cpp" , ], // 依賴的目錄 local_include_dirs: [ "EllipticFusionSensorManager" ], // 編譯的一些flag cflags: [ "-DLOG_TAG=\"SensorService\"" , "-Wall" , "-Werror" , "-Wextra" , "-fvisibility=hidden" , "-DHAS_SENSOR_CONTROL" ], // 依賴的共享庫 shared_libs: [ "libcutils" , "libhardware" , "libhardware_legacy" , "libutils" , "liblog" , "libbinder" , "libsensor" , "libsensorprivacy" , "libcrypto" , "libbase" , "libhidlbase" , "libhidltransport" , "libhwbinder" , "libfmq" , "android.hardwa[email protected]" , "[email protected]" , ], // 依賴的靜态庫 static_libs: [ "[email protected]" ], // our public headers depend on libsensor and libsensorprivacy // 導出的共享庫 export_shared_lib_headers: [ "libsensor" ,  "libsensorprivacy" ], }

bp編譯一般需要指定：

一.子產品性質，是庫還是可執行檔案

cc_library_shared/cc_binary

二.依賴的編譯檔案：

srcs

三.依賴的共享庫

shared_libs

四.指定編譯的flags:

cflags

五.依賴的靜态庫

static_libs
           

三.go編譯腳本

    其實go也是去填充上邊的值而已，我把上邊的bp檔案翻譯成了go:

Android.bp

// 這裡必須要配置，指定要去編譯的go檔案 bootstrap_go_package { // name and pkgPath need to  according to your module name:  "soong-sensorservice" , pkgPath:  "android/soong/sensorservice" , deps: [ "blueprint" , "blueprint-pathtools" , "soong" , "soong-android" , "soong-cc" , "soong-genrule" , ], srcs: [ // 指定你的go編譯檔案 "sensorService.go" , ], pluginFor: [ "soong_build" ], } subdirs = [ "hidl" ] cc_sensor_library_shared { // 庫名字 name:  "libsensorservice" , }

go

package sensorservice import ( "android/soong/android" "android/soong/cc" "fmt" ) var ( isMiui bool ) func init() { // 注冊cc_sensor_library_shared， 指定要調用的方法入口sensorService_LibraryFactory android.RegisterModuleType( "cc_sensor_library_shared" , sensorService_LibraryFactory) } func sensorService_LibraryFactory() (android.Module) { // 庫編譯要擷取LibrarySharedFactory， 可執行檔案編譯要擷取DefaultsFactory（這一步很重要） module := cc.LibrarySharedFactory() android.AddLoadHook(module, sensorService_Defaults) return module } func sensorService_Defaults(ctx android.LoadHookContext) { type props struct { // 定義Android.bp中的各個字段 Cflags []string Srcs []string Include_dirs []string Shared_libs []string Local_include_dirs []string Static_libs []string Export_shared_lib_headers []string } p := &props{} // 初始化環境配置，做不同版本的判斷 initEnvironment(ctx) // 擷取scrs配置 p.Srcs = getSrcs(ctx) // 擷取local_include_dirs配置 p.Local_include_dirs = getLocalIncludeDirs(ctx) // 擷取local_include_dirs配置 p.Cflags = getCflags(ctx) // 擷取shared_libs配置 p.Shared_libs = getSharedLibs(ctx) // 擷取static_libs配置 p.Static_libs = getStaticLibs(ctx) // 擷取include_dirs配置 p.Include_dirs = getIncludeDirs(ctx) // 擷取export_shared_lib_headers配置 p.Export_shared_lib_headers = getExportSharedLibHeaders(ctx)                  // 上邊寫的配置，不需要全寫在go中，隻需要把條件編譯的代碼放進來就可以了，其他的還是配置在Android.bp中 ctx.AppendProperties(p) } func initEnvironment(ctx android.LoadHookContext) { // 判斷該路徑是否存在 v,error := PathExists( "miui/frameworks/base/v29/native/libmqsas" ) // 初始化isMiui變量 if (v && error != nil) { isMiui =  true fmt.Println( "sensorService = is Miui" ) }  else { isMiui =  false fmt.Println( "sensorService = isn't Miui" ) } } func getCflags(ctx android.BaseContext) ([]string) { var cflags []string cflags = append(cflags,  "-DLOG_TAG=\"SensorService\"" ) cflags = append(cflags,  "-Wall" ) cflags = append(cflags,  "-Werror" ) cflags = append(cflags,  "-Wextra" ) cflags = append(cflags,  "-fvisibility=hidden" ) cflags = append(cflags,  "-DHAS_SENSOR_CONTROL" ) if (isMiui) { cflags = append(cflags,  "-DSENSOR_DATA_COLLECTION" ) } return cflags } func getExportSharedLibHeaders(ctx android.BaseContext) ([]string) { var libs []string libs = append(libs,  "libsensor" ) libs = append(libs,  "libsensorprivacy" ) return libs } func getLocalIncludeDirs(ctx android.BaseContext) ([]string) { var localDirs []string localDirs = append(localDirs,  "EllipticFusionSensorManager" ) return localDirs } func getIncludeDirs(ctx android.BaseContext) ([]string) { var dirs []string if (isMiui) { dirs = append(dirs,  "miui/frameworks/base/v29/native/libmqsas" ) } return dirs } func getStaticLibs(ctx android.BaseContext) ([]string) { var libs []string libs = append(libs,  "[email protected]" ) return libs } func getSrcs(ctx android.BaseContext) ([]string) { var srcs []string srcs = append(srcs,  "BatteryService.cpp" ) srcs = append(srcs,  "CorrectedGyroSensor.cpp" ) srcs = append(srcs,  "Fusion.cpp" ) srcs = append(srcs,  "GravitySensor.cpp" ) srcs = append(srcs,  "LinearAccelerationSensor.cpp" ) srcs = append(srcs,  "OrientationSensor.cpp" ) srcs = append(srcs,  "RecentEventLogger.cpp" ) srcs = append(srcs,  "RotationVectorSensor.cpp" ) srcs = append(srcs,  "SensorDevice.cpp" ) srcs = append(srcs,  "SensorDeviceUtils.cpp" ) srcs = append(srcs,  "SensorDirectConnection.cpp" ) srcs = append(srcs,  "SensorEventConnection.cpp" ) srcs = append(srcs,  "SensorFusion.cpp" ) srcs = append(srcs,  "SensorInterface.cpp" ) srcs = append(srcs,  "SensorList.cpp" ) srcs = append(srcs,  "SensorRecord.cpp" ) srcs = append(srcs,  "SensorService.cpp" ) srcs = append(srcs,  "SensorServiceUtils.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/EllipticFusionSensorManager.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/TableTopSensor.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/ProximityFusionSensor.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/SnapFusionSensor.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/MuteFusionSensor.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/PhoneMotionSensor.cpp" ) srcs = append(srcs,  "EllipticFusionSensorManager/ParseFusionSensorConfig.cpp" ) srcs = append(srcs,  "SensorControl.cpp" ) return srcs } func getSharedLibs(ctx android.BaseContext) ([]string) { var libs []string libs = append(libs,  "libcutils" ) libs = append(libs,  "libhardware" ) libs = append(libs,  "libhardware_legacy" ) libs = append(libs,  "libutils" ) libs = append(libs,  "liblog" ) libs = append(libs,  "libbinder" ) libs = append(libs,  "libsensor" ) libs = append(libs,  "libsensorprivacy" ) libs = append(libs,  "libcrypto" ) libs = append(libs,  "libbase" ) libs = append(libs,  "libhidlbase" ) libs = append(libs,  "libhidltransport" ) libs = append(libs,  "libhwbinder" ) libs = append(libs,  "libfmq" ) libs = append(libs,  "[email protected]" ) libs = append(libs,  "[email protected]" ) if (isMiui) { libs = append(libs,  "libmqsas_v29" ) } return libs }

通過上邊的執行個體翻譯，現在是不是覺得Android.bp調件編譯也很簡單了