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makingthematrix / scalaonandroid

A tutorial and examples of how to write Android apps in Scala 2.13 and Scala 3.
GNU General Public License v3.0
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Not possible to build on Apple silicon at the moment #21

Open gunnarre opened 1 month ago

gunnarre commented 1 month ago

It is not possible to build Scala apps for Android on Apple silicon Macs at the moment (as of october 2024), because Gluon Substrate doesn't support it.

Details:

I have Homebrew and XCode on the Mac from before, giving me some tools that might not be there on a fresh start.

I downloaded graalvm-java23-darwin-aarch64-gluon-23+25.1-dev from https://github.com/gluonhq/graal/releases - the regular release didn't work - you need the one forked by the Gluon project.

Unpacked to /Library/Java/JavaVirtualMachines/graalvm-java23-darwin-aarch64-gluon-23+25.1-dev and allowed it to run: sudo xattr -r -d com.apple.quarantine /Library/Java/JavaVirtualMachines/graalvm-java23-darwin-aarch64-gluon-23+25.1-dev

Used Maven 3.8.8 - Maven 3.9 has a number of bugs in plugin handling (https://github.com/actions/runner-images/issues/7216) which makes it necessary to downgrade to 3.8.8. I installed Maven in a user folder.

.bash_profile settings:

export GRAALVM_HOME=/Library/Java/JavaVirtualMachines/graalvm-java23-darwin-aarch64-gluon-23+25.1-dev/Contents/Home
export JAVA_HOME=$GRAALVM_HOME
export PATH=$GRAALVM_HOME/bin:$PATH
export PATH=[yourpathhere]/apache-maven-3.8.8/bin:$PATH

Running helloscala with mvn gluonfx:run works with GluonFX plugin 1.0.16. Before building a native image I had to change gluonfx.maven.plugin.version to 1.0.24 in pom.xml. Running the app natively with mvn gluonfx:build gluonfx:nativerun then works.

Unfortunately, I couldn't build it for Android, because when I run mvn -Pandroid gluonfx:build gluonfx:package I get the error message

java.lang.IllegalArgumentException: We currently can't compile to aarch64-linux-android when running on aarch64-apple-darwin
    at com.gluonhq.substrate.SubstrateDispatcher.getTargetConfiguration(SubstrateDispatcher.java:392)
gunnarre commented 1 month ago

Trying to use the Intel version of GraalVM did't work either:

[INFO] --- gluonfx-maven-plugin:1.0.24:compile (default-cli) @ helloscala ---
java.lang.IllegalArgumentException: We currently can't compile to aarch64-linux-android when running on x86_64-apple-darwin
    at com.gluonhq.substrate.SubstrateDispatcher.getTargetConfiguration(SubstrateDispatcher.java:392)