Add win32-aarch64 support

[tresf]

@gary-rowe as ARM OSs are becoming more popular on Windows and inevitably macOS, can we help contribute binaries to you for those platforms? If so, how can we get started?

[gary-rowe]

Agreed. I'm hoping to get my cross-compilation environment to support ARM soon.

Just in case it's of interest, I have a Telegram group chat if you want to get involved.

[gary-rowe]

Quick update: I've released hid4java version 0.6.0 to Maven Central which has several improvements to JNA and hidapi.

In the examples code I've added an architecture detection logging message which should assist with selection of suitable ARM support. As I understand it, JNA supports linux-arm (32-bit hard float), linux-armel (32-bit EABI) and linux-aarch64 is directed at ARM v8 but I don't have any hardware that could trigger this detection.

Would it be possible for your team to run the 0.6.0 code on the ARM hardware and tell me what the platform output is? For example on OS X (10.15.5) the output is:

Platform architecture: x86-64
Resource prefix: darwin

[tresf]

Would it be possible for your team to run the 0.6.0 code on the ARM hardware and tell me what the platform output is? For example on OS X (10.15.5) the output is:

Windows

Fortunately, Microsoft recently released an alpha JVM for Windows on ARM. Unfortunately... unless you're aware of another way, think this will require JNA for these platforms is available first. Here's what happens when I try to echo the lines you've referenced. It does show win32-aarch64, so I think that helps?

public class Main {


    public static void main(String[] args) {

        System.out.println("Platform architecture: " + Platform.ARCH);
        System.out.println("Resource prefix: " + Platform.RESOURCE_PREFIX);

    }

}


Raw output from "java HidTest"

C:\Users\Owner\Desktop\HidTest\src>"C:\Program Files\OpenJDK\jdk-15-ea+25-windows-aarch64\bin\java.exe" -cp .;..\lib\* com.company.Main
Exception in thread "main" org.hid4java.HidException: Hidapi did not initialise: Native library (com/sun/jna/win32-aarch64/jnidispatch.dll) not found in resource path (.;..\lib\hid4java-develop-SNAPSHOT.jar;..\lib\jna-5.5.0.jar)
        at org.hid4java.HidDeviceManager.<init>(HidDeviceManager.java:87)
        at org.hid4java.HidServices.<init>(HidServices.java:82)
        at org.hid4java.HidManager.getHidServices(HidManager.java:75)
        at org.hid4java.HidManager.getHidServices(HidManager.java:54)
        at com.company.Main.main(Main.java:10)
Caused by: java.lang.UnsatisfiedLinkError: Native library (com/sun/jna/win32-aarch64/jnidispatch.dll) not found in resource path (.;..\lib\hid4java-develop-SNAPSHOT.jar;..\lib\jna-5.5.0.jar)
        at com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath(Native.java:1032)
        at com.sun.jna.Native.loadNativeDispatchLibrary(Native.java:988)
        at com.sun.jna.Native.<clinit>(Native.java:195)
        at org.hid4java.jna.HidApiLibrary.<clinit>(HidApiLibrary.java:39)
        at org.hid4java.jna.HidApi.<clinit>(HidApi.java:60)
        at org.hid4java.HidDeviceManager.<init>(HidDeviceManager.java:84)
        ... 4 more

Mac

I'm still trying to get my hands on an openjdk build for MacOS, even a Zero-Assembler build would be a nice start. I'll update as I find out more.

[gary-rowe]

Thanks for running the tests, Tres. That output clearly shows that JNA doesn't have a compiled DLL for the win32-aarch64 system. Still, that does back up my linux-aarch64 theory so that's progress. If I get some time I might have a crack at compiling a JNA DLL (if it's even possible to get hold of the source to it) and put together an experimental hid4java. I'll update here with any news on that front.

[tresf]

If I get some time I might have a crack at compiling a JNA DLL (if it's even possible to get hold of the source to it) and put together an experimental hid4java. I'll update here with any news on that front.

Ok, if you have arm64 MSVC++ installed I believe the main change is to the VsDevCmd.bat command:

- -arch=amd64
+ -arch=arm64 -host_arch=amd64

Took me a while for me to find this, wanted to share.