What Is RUNNER_ARCH?

RUNNER_ARCH is the CPU architecture of the runner - X86, X64, ARM, or ARM64.

RUNNER_ARCH matters for downloading the right toolchain binary or building architecture-specific artifacts.

Common values

• X64 - most Linux/Windows runners
• ARM64 - Apple Silicon and ARM runners

Key takeaways

• RUNNER_ARCH is the runner CPU architecture.
• Common values are X64 and ARM64.
• Use it to fetch the correct binary.

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