unityLibrary:BuildIl2CppTask

[RoxDevvv]

Describe the bug while trying to build in flutter

FAILURE: Build failed with an exception.

• Where: Build file 'E:\Project\Flutter\auto\signlanguage\android\unityLibrary\build.gradle' line: 59

• What went wrong: Execution failed for task ':unityLibrary:BuildIl2CppTask'. Process 'command 'E:/Project/Flutter/auto/signlanguage/android/unityLibrary/src/main/Il2CppOutputProject/IL2CPP/build/deploy/netcoreapp3.1/il2cpp.exe'' finished with non-zero exit value 4

Gardle file:

this is my gardle file : i did not edit it , it is auto generated so i don't know why it give error

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN

apply plugin: 'com.android.library'


dependencies {
    implementation(name: 'unity-classes', ext:'jar')
}

android {
    compileSdkVersion 29
    buildToolsVersion '30.0.2'

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        minSdkVersion 19
        targetSdkVersion 29
        ndk {
            abiFilters 'armeabi-v7a', 'arm64-v8a'
        }
        versionCode 2
        versionName '0.11'
        consumerProguardFiles 'proguard-unity.txt'
    }

    lintOptions {
        abortOnError false
    }

    aaptOptions {
        noCompress = ['.ress', '.resource', '.obb']
        ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
    }

    packagingOptions {
        doNotStrip '*/armeabi-v7a/*.so'
        doNotStrip '*/arm64-v8a/*.so'
    }
}

def getSdkDir() {
    Properties local = new Properties()
    local.load(new FileInputStream("${rootDir}/local.properties"))
    return local.getProperty('sdk.dir')
}

def BuildIl2Cpp(String workingDir, String targetDirectory, String architecture, String abi, String configuration) {
    exec {
        commandLine(workingDir + "/src/main/Il2CppOutputProject/IL2CPP/build/deploy/netcoreapp3.1/il2cpp.exe",
            "--compile-cpp",
            "--libil2cpp-static",
            "--platform=Android",
            "--architecture=" + architecture,
            "--configuration=" + configuration,
            "--outputpath=" + workingDir + targetDirectory + abi + "/libil2cpp.so",
            "--cachedirectory=" + workingDir + "/build/il2cpp_"+ abi + "_" + configuration + "/il2cpp_cache",
            "--additional-include-directories=" + workingDir + "/src/main/Il2CppOutputProject/IL2CPP/external/bdwgc/include",
            "--additional-include-directories=" + workingDir + "/src/main/Il2CppOutputProject/IL2CPP/libil2cpp/include",
            "--tool-chain-path=" + android.ndkDirectory,
            "--map-file-parser=" + workingDir + "/src/main/Il2CppOutputProject/IL2CPP/MapFileParser/MapFileParser.exe",
            "--generatedcppdir=" + workingDir + "/src/main/Il2CppOutputProject/Source/il2cppOutput",
            "--baselib-directory=" + workingDir + "/src/main/jniStaticLibs/" + abi,
            "--dotnetprofile=unityaot")
        environment "ANDROID_SDK_ROOT", getSdkDir()
    }
    delete workingDir + targetDirectory + abi + "/libil2cpp.sym.so"
    ant.move(file: workingDir + targetDirectory + abi + "/libil2cpp.dbg.so", tofile: workingDir + "/symbols/" + abi + "/libil2cpp.so")
}

android {
    task BuildIl2CppTask {
        doLast {
              BuildIl2Cpp(projectDir.toString().replaceAll('\\\\', '/'), '/src/main/jniLibs/', 'ARMv7', 'armeabi-v7a', 'Release');
              BuildIl2Cpp(projectDir.toString().replaceAll('\\\\', '/'), '/src/main/jniLibs/', 'ARM64', 'arm64-v8a', 'Release');
        }
    }
    afterEvaluate {
        if (project(':unityLibrary').tasks.findByName('mergeDebugJniLibFolders'))
            project(':unityLibrary').mergeDebugJniLibFolders.dependsOn BuildIl2CppTask
        if (project(':unityLibrary').tasks.findByName('mergeReleaseJniLibFolders'))
            project(':unityLibrary').mergeReleaseJniLibFolders.dependsOn BuildIl2CppTask
    }
    sourceSets {
        main {
            jni.srcDirs = ["src/main/Il2CppOutputProject"]
        }
    }
}

[mvn-daipham2-hn]

You replace all content on BuildIl2Cpp function by these:

    def commandLineArgs = []
    commandLineArgs.add("--compile-cpp")
    commandLineArgs.add("--platform=Android")
    commandLineArgs.add("--architecture=" + architecture)
    commandLineArgs.add("--outputpath=" + workingDir + "/src/main/jniLibs/" + abi + "/libil2cpp.so")
    commandLineArgs.add("--libil2cpp-static")
    commandLineArgs.add("--baselib-directory=" + workingDir + "/src/main/jniStaticLibs/" + abi)
    commandLineArgs.add("--incremental-g-c-time-slice=3")
    commandLineArgs.add("--configuration=" + configuration)
    //commandLineArgs.add("--dotnetprofile=unityaot-linux")
    //commandLineArgs.add("--enable-debugger")
    //commandLineArgs.add("--profiler-report")
    //commandLineArgs.add("--profiler-output-file=" + workingDir + "/build/il2cpp_"+ abi + "_" + configuration + "/il2cpp_conv.traceevents")
    commandLineArgs.add("--print-command-line")
    commandLineArgs.add("--additional-include-directories=" + workingDir + "/src/main/Il2CppOutputProject/IL2CPP/external/bdwgc/include")
    commandLineArgs.add("--additional-include-directories=" + workingDir + "/src/main/Il2CppOutputProject/IL2CPP/libil2cpp/include")
    commandLineArgs.add("--generatedcppdir=" + workingDir + "/src/main/Il2CppOutputProject/Source/il2cppOutput")
    commandLineArgs.add("--cachedirectory=" + workingDir + "/build/il2cpp_"+ abi + "_" + configuration + "/il2cpp_cache")
    commandLineArgs.add("--tool-chain-path=" + android.ndkDirectory)
    staticLibraries.eachWithIndex {fileName, i->
        commandLineArgs.add("--additional-libraries=" + workingDir + "/src/main/jniStaticLibs/" + abi + "/" + fileName)
    }
    def executableExtension = ""
    if (org.gradle.internal.os.OperatingSystem.current().isWindows())
        executableExtension = ".exe"
    exec {
        executable workingDir + "/src/main/Il2CppOutputProject/IL2CPP/build/deploy/il2cpp" + executableExtension
        args commandLineArgs
        environment "ANDROID_SDK_ROOT", getSdkDir()
    }
    delete workingDir + "/src/main/jniLibs/" + abi + "/libil2cpp.sym.so"
    ant.move(file: workingDir + "/src/main/jniLibs/" + abi + "/libil2cpp.dbg.so", tofile: workingDir + "/symbols/" + abi + "/libil2cpp.so")

and add path to unity ndk tool in android/local.properties, example: ndk.dir=/Applications/Unity/Hub/Editor/2021.2.13f1/PlaybackEngines/AndroidPlayer/NDK

Hope this helps. Origin solution: https://github.com/juicycleff/flutter-unity-view-widget/issues/544

[luzac]

Try to export unity to apk first. During the process you will probably fail and get some error prompts which tell you where the problems are. Then try to export to project, just make sure android and unityLibrary refer the same ndk folder.