v0.1.1-rc3

Release Notes: rules_scala_native v0.1.0-rc3

We are excited to announce the first release candidate for rules_scala_native, bringing scalable, hermetic Scala Native builds to the Bazel ecosystem.

Key Features

📦 Bzlmod First

Full support for Bazel's modern dependency management system (Bzlmod). No WORKSPACE configuration required.

🌐 Advanced Cross-Compilation

Seamlessly target multiple architectures and operating systems using a hermetic LLVM/Clang toolchain.

• Verified Host: Linux x86_64
• Verified Targets: 72 combinations including Linux (glibc 2.28+, musl), macOS, and Windows.
• Supported Architectures: x86_64, aarch64.

🔌 Polyglot Interoperability

Easy integration with other native languages via Bazel dependencies. Link scala_native_binary against:

• cc_library (C/C++)
• rust_static_library (via rules_rust)
• zig_static_library (via rules_zig)

🧪 First-Class Testing

Native support for JUnit tests via scala_native_test, ensuring your native code is as reliable as your JVM code.

Installation

Add the following to your MODULE.bazel file:

# MODULE.bazel (partial)
bazel_dep(name = "rules_scala_native", version = "0.1.0-rc3")

# Required dependencies
bazel_dep(name = "rules_scala", version = "7.2.2")
bazel_dep(name = "llvm", version = "0.6.1")

# Register toolchains
register_toolchains(
    "@llvm//toolchain:all",
    "@rules_scala_toolchains//...:all",
    "@rules_scala_native//scala_native:scala_native_toolchain",
)

Requirements

• Bazel: 9.0.0 or higher
• Scala: 3.8.1
• Scala Native: 0.5.10

Current Limitations

• Windows support is currently in early stage (work-in-progress).
• scala_native_test requires explicit listing of test suites.
• Only Scala 3.8.1 and Scala Native 0.5.10 are officially supported in this release.

Contributors

A huge thanks to everyone on the Scala who contributed to this release!

cFull Changelog: v0.1.0...v0.1.1-rc3