NDKBuild Failure

Question

I'm having trouble getting my NDK to compile properly in Android Studio. Whenever I try running to compile I am getting the following error.

Error:Execution failed for task ':app:ndkBuild'. A problem occurred starting process 'command 'ndk-build.cmd''

I have the following setup

And my build.gradle file is the following.

import org.apache.tools.ant.taskdefs.condition.Os  apply plugin: 'com.android.application'  android {     compileSdkVersion 21     buildToolsVersion "21.1.2"      defaultConfig {         applicationId "edu.uky.cs.www.diagramaphone"         minSdkVersion 14         targetSdkVersion 21         versionCode 1         versionName "1.0"          sourceSets.main{             jniLibs.srcDir 'src/main/libs'             jni.srcDirs = [] //disable automatic ndk-build call         }         project.ext.versionCodes = ['armeabi':1, 'armeabi-v7a':2, 'arm64-v8a':3, 'mips':5, 'mips64':6, 'x86':8, 'x86_64':9] //versionCode digit for each supported ABI, with 64bit>32bit and x86>armeabi-*         android.applicationVariants.all { variant ->             // assign different version code for each output             variant.outputs.each { output ->                 output.versionCodeOverride =                         project.ext.versionCodes.get(output.getFilter(com.android.build.OutputFile.ABI), 0) * 1000000 + defaultConfig.versionCode             }         }         // call regular ndk-build(.cmd) script from app directory         task ndkBuild(type: Exec) {             if (Os.isFamily(Os.FAMILY_WINDOWS)) {                 commandLine 'ndk-build.cmd', '-C', file('src/main').absolutePath             } else {                 commandLine 'ndk-build', '-C', file('src/main').absolutePath             }         }         tasks.withType(JavaCompile) {             compileTask -> compileTask.dependsOn ndkBuild         }         //ndk {           //  moduleName "shape-detect"             //cFlags "-DANDROID_NDK -D_DEBUG DNULL=0" // Define some macros             //ldLibs "EGL", "GLESv3", "dl", "log"         // Link with these libraries!             //stl "stlport_shared"                        // Use shared stlport library         //}      }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile fileTree(include: ['*.jar'], dir: 'libs')     compile 'com.android.support:appcompat-v7:21.0.3'     compile project(':libraries:tess-two')     compile project(':libraries:opencv') } 

At this point I'm lost as to what can be wrong. I've followed several tutorials to try setting up the NDK to work properly, but I keep getting the error I showed above. Can anyone here provide some feedback on what I need to do in order to get the NDK to compile?

EDIT: Here's the entire message that occurs.

Information:Gradle tasks [:app:assembleDebug] :app:preBuild UP-TO-DATE :app:preDebugBuild UP-TO-DATE :app:compileDebugNdk UP-TO-DATE :app:checkDebugManifest :app:preReleaseBuild UP-TO-DATE :libraries:opencv:compileLint :libraries:opencv:copyReleaseLint UP-TO-DATE :libraries:opencv:mergeReleaseProguardFiles UP-TO-DATE :libraries:opencv:preBuild UP-TO-DATE :libraries:opencv:preReleaseBuild UP-TO-DATE :libraries:opencv:checkReleaseManifest :libraries:opencv:prepareReleaseDependencies :libraries:opencv:compileReleaseAidl UP-TO-DATE :libraries:opencv:compileReleaseRenderscript UP-TO-DATE :libraries:opencv:generateReleaseBuildConfig UP-TO-DATE :libraries:opencv:generateReleaseAssets UP-TO-DATE :libraries:opencv:mergeReleaseAssets UP-TO-DATE :libraries:opencv:generateReleaseResValues UP-TO-DATE :libraries:opencv:generateReleaseResources UP-TO-DATE :libraries:opencv:packageReleaseResources UP-TO-DATE :libraries:opencv:processReleaseManifest UP-TO-DATE :libraries:opencv:processReleaseResources UP-TO-DATE :libraries:opencv:generateReleaseSources UP-TO-DATE :libraries:opencv:compileReleaseJava UP-TO-DATE :libraries:opencv:processReleaseJavaRes UP-TO-DATE :libraries:opencv:packageReleaseJar UP-TO-DATE :libraries:opencv:compileReleaseNdk UP-TO-DATE :libraries:opencv:packageReleaseJniLibs UP-TO-DATE :libraries:opencv:packageReleaseLocalJar UP-TO-DATE :libraries:opencv:packageReleaseRenderscript UP-TO-DATE :libraries:opencv:bundleRelease UP-TO-DATE :libraries:tess-two:compileLint :libraries:tess-two:copyReleaseLint UP-TO-DATE :libraries:tess-two:mergeReleaseProguardFiles UP-TO-DATE :libraries:tess-two:preBuild UP-TO-DATE :libraries:tess-two:preReleaseBuild UP-TO-DATE :libraries:tess-two:checkReleaseManifest :libraries:tess-two:prepareReleaseDependencies :libraries:tess-two:compileReleaseAidl UP-TO-DATE :libraries:tess-two:compileReleaseRenderscript UP-TO-DATE :libraries:tess-two:generateReleaseBuildConfig UP-TO-DATE :libraries:tess-two:generateReleaseAssets UP-TO-DATE :libraries:tess-two:mergeReleaseAssets UP-TO-DATE :libraries:tess-two:generateReleaseResValues UP-TO-DATE :libraries:tess-two:generateReleaseResources UP-TO-DATE :libraries:tess-two:packageReleaseResources UP-TO-DATE :libraries:tess-two:processReleaseManifest UP-TO-DATE :libraries:tess-two:processReleaseResources UP-TO-DATE :libraries:tess-two:generateReleaseSources UP-TO-DATE :libraries:tess-two:compileReleaseJava UP-TO-DATE :libraries:tess-two:processReleaseJavaRes UP-TO-DATE :libraries:tess-two:packageReleaseJar UP-TO-DATE :libraries:tess-two:compileReleaseNdk UP-TO-DATE :libraries:tess-two:packageReleaseJniLibs UP-TO-DATE :libraries:tess-two:packageReleaseLocalJar UP-TO-DATE :libraries:tess-two:packageReleaseRenderscript UP-TO-DATE :libraries:tess-two:bundleRelease UP-TO-DATE :app:prepareComAndroidSupportAppcompatV72103Library UP-TO-DATE :app:prepareComAndroidSupportSupportV42103Library UP-TO-DATE :app:prepareDiagramaphoneLibrariesOpencvUnspecifiedLibrary UP-TO-DATE :app:prepareDiagramaphoneLibrariesTessTwoUnspecifiedLibrary UP-TO-DATE :app:prepareDebugDependencies :app:compileDebugAidl UP-TO-DATE :app:compileDebugRenderscript UP-TO-DATE :app:generateDebugBuildConfig UP-TO-DATE :app:generateDebugAssets UP-TO-DATE :app:mergeDebugAssets UP-TO-DATE :app:generateDebugResValues UP-TO-DATE :app:generateDebugResources UP-TO-DATE :app:mergeDebugResources UP-TO-DATE :app:processDebugManifest UP-TO-DATE :app:processDebugResources UP-TO-DATE :app:generateDebugSources UP-TO-DATE :app:ndkBuild FAILED Error:Execution failed for task ':app:ndkBuild'. > A problem occurred starting process 'command 'ndk-build.cmd'' Information:BUILD FAILED Information:Total time: 2.226 secs Information:1 error Information:0 warnings Information:See complete output in console 

Answer 1

I met this kind of problem. First of all You have to give your NDK path in local.properties of your app.

e.g. ndk.dir=/home/user/bin/android_ndk/android-ndk-r10e

Then in my build.gradle file I had something like this for calling ndk build command.

commandLine 'ndk-build', '-C', file('src/main/jni').absolutePath 

I'v change it to

commandLine '/home/user/bin/android_ndk/android-ndk-r10e/ndk-build', '-C', file('src/main/jni').absolutePath 

I gave full path of NDK build. Hope it'll help you.

Answer 2

In android studio, File->Project Structure -> SDK Location, Set the Android NDK location for your computer.

Thanks!