distribute and use .so files for linux platform

[Lefix2]

Hello,

I'm struggling while installing/loading some dynamic libraries into my app.

I'm currently developing only for Linux but i want to be "future-proof" for possible windows port of my application.

Currently, i have so custom .so files, some used with jni, that i want to embed in my App without creating an AppImage.

The solution I found is to put my libraries into ${PROJECT_DIR}/main/resources/linux/lib/*.so and addig the following lines to my build.gradle:

compose.desktop {
    application {
        mainClass = "ManufacturingHostKt"

        nativeDistributions {
            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
            packageVersion = "1.0.0"

            appResourcesRootDir.set(project.layout.projectDirectory.dir("resources"))
        }
    }
}

Then in my application load libraries with:

val resourcesDir = File(System.getProperty("compose.application.resources.dir"))
System.load(resourcesDir.resolve("lib/libMylib.so").path)

Note that calling a .so is platform dependant and I will prefer something like

System.loadLibrary("Mylib")

But when I create distributable (./gradlew createDistributable) the files are not copied into build/compose/binaries/main/app/MyApp/lib/app/resources/
At runtime, the path to search for library is correct:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Can't load library: <path-to-my-app>/build/compose/binaries/main/app/MyApp/lib/app/resources/lib/libMylib.so

• Kotlin version: jvm v1.8.20
• Compose Multiplatform version: 1.4

[m-sasha]

Does it work when you run the app from the IDE? Only the packaged app fails?

[Lefix2]

Yes i tried everything, it fails as for 'run' and 'runDistributable'

I don't mentioned it but manually copying files works

[m-sasha]

@AlexeyTsvetkov Can you help here?

By the way, in my app I put resources (although they're not native libs) under src/main/resources/resource.ext and they are packaged and loadable with ClassLoader.getResourceAsStream without configuring anything in gradle at all.

[m-sasha]

@Lefix2 Also, you could ask in our #compose-desktop slack channel; maybe someone could help you faster.

[Lefix2]

I've also pointed that:
For my app icon (in src/main/resources/icon.svg), it is loaded when i run the app but it is also not present in the distributable resource folder

[Lefix2]

@Lefix2 Also, you could ask in our #compose-desktop slack channel; maybe someone could help you faster.

I'll do that!

[DatL4g]

Take a look at this thread #2618

My native loader looks like this:

val resDir = File(systemProperty("compose.application.resources.dir"))
val libFile = File(resDir, libFilename(libName))

System.load(libFile.canonicalPath)

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.