This page captures the progress of Bazel for windows on arm.

Status

• Bazel changes to enable WoA has been upstreamed and are present on the trunk.

  • Enable native support for Windows on arm64 (Part 1) by niyas-sait · Pull Request #14689 · bazelbuild/bazel

  • Enable native support for Windows on arm64 by niyas-sait · Pull Request #14340 · bazelbuild/bazel

  • [windows/arm64] Add missing JDK toolchain for java build by niyas-sait · Pull Request #14700 · bazelbuild/bazel

• Bazel changes are ported to the 5.1 release branch.

  • Cherry pick win arm64 by niyas-sait · Pull Request #14794 · bazelbuild/bazel

• Bazel releases are available from Releases · bazelbuild/bazel

Limitations

• Bazelisk (launcher for Bazel) doesn’t yet have support for woa.

  • GitHub - bazelbuild/bazelisk: A user-friendly launcher for Bazel.

Bazel Binaries

Bazel pre-built binaries for woa are available

Releases · bazelbuild/bazel

Building from Source

Bazel can be built from the source and requires an x64 bazel for cross-compilation.

You need Bazel(x64) 5 or later.

This generates a standalone bazel.exe which is a native arm64 Bazel binary.

Bazel builds generated by CI

Bazel binaries for WoA are published as part of Bazel CI and every commit generates a build.

An example built from an old commit. Replace the commit id with one of the latest to access latest builds.

https://storage.googleapis.com/bazel-builds/artifacts/windows_arm64/b6024258c5b9b396b022bad6e7e3d64423048289/bazel

You might need to explicitly add an exe suffix to the generated binary to execute it.

Usage

Using the examples provided in https://docs.bazel.build/versions/main/tutorial/cpp.html

For targeting windows/arm64 , the following flag needs to be specified

--cpu=arm64_windows

For native compilation, target CPU is auto-detected and explicit target is not required.

Few examples given below,

Cross compilation

bazel build --subcommands //main:hello-world --cpu=arm64_windows

Native Compilation

bazel build --subcommands //main:hello-world