Unable to run libgdx on JDK 14

Issue details

Libgdx crashes when trying to run or develop on JDK 14 with the stacktrace attached below. I assume lwjgl needs to be updated.

Reproduction steps/code

Simply create a new project with latest gradle wrapper (6.3). Try running the application, observe the crash.

Version of LibGDX and/or relevant dependencies

1.9.10

Stacktrace

[LwjglApplication] Couldn't initialize audio, disabling audio
java.lang.UnsatisfiedLinkError: /tmp/libgdxtest/dd5c1a65/liblwjgl64.so: /usr/lib/jvm/java-14-openjdk/lib/libjawt.so: version `SUNWprivate_1.1' not found (required by /tmp/libgdxtest/dd5c1a65/liblwjgl64.so)
	at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
	at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2452)
	at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2508)
	at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2704)
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2637)
	at java.base/java.lang.Runtime.load0(Runtime.java:745)
	at java.base/java.lang.System.load(System.java:1871)
	at org.lwjgl.Sys$1.run(Sys.java:70)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
	at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
	at org.lwjgl.Sys.loadLibrary(Sys.java:87)
	at org.lwjgl.Sys.<clinit>(Sys.java:117)
	at org.lwjgl.openal.AL.<clinit>(AL.java:59)
	at com.badlogic.gdx.backends.lwjgl.audio.OpenALAudio.<init>(OpenALAudio.java:72)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication.<init>(LwjglApplication.java:90)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication.<init>(LwjglApplication.java:71)
	at com.test.DesktopLauncher.main(DesktopLauncher.java:9)

Please select the affected platforms

• Android
• iOS (robovm)
• iOS (MOE)
• HTML/GWT
• Windows
• Linux
• MacOS

[tommyettinger]

I’ve seen roughly the same error posted with an Ubuntu default JDK11 JVM, a more recent Amazon Corretto JVM, and if I remember it right there was a Fedora case as well (oh hi Torbuntu!). All mention ld.so, so somewhere in native code, and a linker error. I’m inclined to believe this has to do with some common but incorrect build setting when assembling OpenJDK; the JDKs can run at least some other applications. It’s absolutely possible that OpenGL is related to the error, or that some JDKs are already removing support for some features in sun.misc.Unsafe or other internal APIs marked for eventual removal. There does appear to be a difference between LWJGL2 and LWJGL3 here, and version 3 seems to include a fix for whatever it is. The switch to GLFW is my guess why that fix works.

Personally, I’d push for halting support for MacOS entirely if or when OpenGL becomes unusable on that OS. Obviously iOS is a major target for mobile, via MobiVM/RoboVM, but for desktop OS targets… The game Halfway used libGDX amazingly well, and though their genre isn’t the same as most other games you could compare with, 4% of sales being to MacOS is a pretty miserable return considering 50% of all support requests came from Macs. Here’s a link to Robotality’s Halfway Post-Mortem.

[NathanSweet]

Fixed by: 778c936c9cc35c20ded87c2ff95252c217831963