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Can't find native libraries when running under gradle

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Can't find native libraries when running under gradle
« on: September 14, 2016, 23:06:45 »
I'm trying to get a new LWJGL project running.  I'd like to use gradle so that I can achieve some platform independency.  However, I can't figure out how to set up gradle so that my program will find the LWJGL natives at runtime.  All of the posts which I can find about this suggest setting your -Djava.library.path explicitly, which defeats the whole point of using gradle.  Is there a way I can set up my build file so that it is machine independent?

root build.gradle:
Code: [Select]
buildscript {
    repositories {
        mavenLocal()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        jcenter()
    }
   
    project.ext.lwjglVersion = "3.0.0a"

    dependencies {
        classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'

        classpath "org.lwjgl:lwjgl:${lwjglVersion}"
        classpath "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-windows"
        classpath "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-linux"
        classpath "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-osx"
    }
}

allprojects {
    version = '1.0'
    ext {
        appName = "AssetEditor"
    }

    repositories {
        mavenLocal()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
        maven { url "https://oss.sonatype.org/content/repositories/releases/" }
    }
}


project(":AssetEditorDesktop") {
    apply plugin: "java"

    dependencies {
        compile project(":AssetEditorCore")
       
        compile "org.lwjgl:lwjgl:${lwjglVersion}"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-windows"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-linux"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-osx"
    }
}

project(":AssetEditorCore") {
    apply plugin: "java"

    dependencies {
        compile "org.lwjgl:lwjgl:${lwjglVersion}"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-windows"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-linux"
        compile "org.lwjgl:lwjgl-platform:${lwjglVersion}:natives-osx"
    }
}

subproject build.gradle:
Code: [Select]
apply plugin: "java"

sourceCompatibility = 1.8

project.ext.mainClassName = "com.kitfox.assetEd.ui.AssetEditorMain"
project.ext.assetsDir = new File("assets");

task debug(dependsOn: classes, type: JavaExec) {
    main = project.mainClassName
    classpath = sourceSets.main.runtimeClasspath
    standardInput = System.in
    workingDir = project.assetsDir
    ignoreExitValue = true
    debug = true
}

task run(dependsOn: classes, type: JavaExec) {
    main = project.mainClassName
    classpath = sourceSets.main.runtimeClasspath
    standardInput = System.in
    workingDir = project.assetsDir
    ignoreExitValue = true
//    jvmArgs = '-Djava.library.path=/path/to/native/macosx'
}

task dist(type: Jar) {
    from files(sourceSets.main.output.classesDir)
    from files(sourceSets.main.output.resourcesDir)
    from {configurations.compile.collect {zipTree(it)}}
    from files(project.assetsDir);
 
    manifest {
        attributes 'Main-Class': project.mainClassName
    }
}

dist.dependsOn classes

error:
Code: [Select]
Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1865)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.lwjgl.LWJGLUtil.loadLibrarySystem(LWJGLUtil.java:337)
at org.lwjgl.Sys$1.run(Sys.java:36)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.<clinit>(Sys.java:33)
at org.lwjgl.LWJGLUtil.initialize(LWJGLUtil.java:309)
at org.lwjgl.system.MemoryUtil.<clinit>(MemoryUtil.java:35)
at org.lwjgl.openal.ALC10.alcOpenDevice(ALC10.java:137)
at com.kitfox.assetEd.ui.audio.Decoder.<init>(Decoder.java:88)
at com.kitfox.assetEd.ui.audio.Decoder.<init>(Decoder.java:78)
at com.kitfox.assetEd.ui.AssetEditorMain.<init>(AssetEditorMain.java:29)
at com.kitfox.assetEd.ui.AssetEditorMain$1.run(AssetEditorMain.java:104)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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Re: Can't find native libraries when running under gradle
« Reply #1 on: September 15, 2016, 10:48:23 »
You're using a very old version (3.0.0a) that didn't include the automatic shared library loader. You should switch to 3.0.0 or 3.0.1-SNAPSHOT.

Note that 3.0.1 is going to have a modular structure. You can use the build configurator in our new download page (click Nightly -> Gradle Mode -> choose the bindings that you need) to easily generate the appropriate Gradle declarations.