feat: Add OpenBSD support for x64 and arm64 architectures by rpx99 · Pull Request #6163 · rollup/rollup

rpx99 · 2025-11-05T19:15:11Z

Summary

This PR adds native binary support for OpenBSD on both x64 and arm64 architectures, following the same patterns established for FreeBSD support.

Changes

Platform Support

✅ Added openbsd-x64 (x86_64-unknown-openbsd)
✅ Added openbsd-arm64 (aarch64-unknown-openbsd)

Files Modified

native.js - Added OpenBSD platform detection
package.json - Added OpenBSD build targets to napi.targets
GitHub Actions - Added OpenBSD builds to CI matrix using cross with build-std: true
Cargo.toml - Configured mimalloc dependencies for OpenBSD
lib.rs - Excluded OpenBSD aarch64 from mimalloc (uses system allocator)
npm packages - Created @rollup/rollup-openbsd-x64 and @rollup/rollup-openbsd-arm64

Memory Allocator Configuration

Following the FreeBSD pattern and issue #6047:

Platform	Allocator	Reason
OpenBSD x64	mimalloc (with `local_dynamic_tls`)	Performance
OpenBSD arm64	System allocator	Avoid SIGILL on older ARM64 CPUs

OpenBSD aarch64 is explicitly excluded from using mimalloc to prevent potential illegal instruction crashes on ARM64 processors that don't support armv8.1-a instruction set extensions.

Implementation Details

mimalloc Safety

OpenBSD x64 uses mimalloc with the local_dynamic_tls feature for thread-local storage
OpenBSD arm64 uses the system allocator (same as FreeBSD arm64)
This prevents SIGILL crashes on older/embedded ARM64 processors (ref: illegal instruction on android arm64 #6047)

Build Process

Uses GitHub Actions with cross-rs/cross for cross-compilation
Requires -Zbuild-std for OpenBSD targets (no prebuilt stdlib)
Identical configuration to FreeBSD builds (proven working since Add support for FreeBSD (x64 and arm64) #5698)

OpenBSD Considerations

ABI Stability: OpenBSD does not guarantee ABI compatibility between releases
pledge/unveil: No conflict - Rollup doesn't use these OpenBSD-specific syscalls
TLS: Uses local_dynamic_tls feature for proper thread-local storage on x64

Related Issues

Fixes Support for OpenBSD/adJ #5478 - Request for OpenBSD/adJ support
Related to Support for FreeBSD #5491 - FreeBSD support (reference implementation)
Ref illegal instruction on android arm64 #6047 - mimalloc SIGILL issue on ARM64 (reason for exclusion)

Test Plan

CI builds complete successfully for both architectures
OpenBSD x64 binary runs on OpenBSD 7.x amd64
OpenBSD arm64 binary runs on OpenBSD 7.x arm64
Rollup can bundle a test project on both platforms
No SIGILL crashes on ARM64

Breaking Changes

None. This is purely additive - adds new optional platform packages.

Notes

OpenBSD binaries will need to be rebuilt for each OpenBSD major release due to ABI changes
This follows the exact same pattern as the successful FreeBSD implementation
Conservative approach: arm64 uses system allocator for maximum compatibility

This commit adds native binary support for OpenBSD, similar to the existing FreeBSD support. Changes: - Add OpenBSD platform detection to native.js - Add OpenBSD build targets (x86_64-unknown-openbsd, aarch64-unknown-openbsd) to package.json - Create npm packages for @rollup/rollup-openbsd-x64 and @rollup/rollup-openbsd-arm64 - Add OpenBSD build configurations to GitHub Actions CI workflow - Update Cargo.toml to include OpenBSD in target-specific dependencies Fixes rollup#5478 Related to rollup#5491

OpenBSD aarch64 should use the system allocator instead of mimalloc, following the same pattern as FreeBSD aarch64. This prevents potential SIGILL crashes on ARM64 processors that don't support armv8.1-a instruction set extensions. mimalloc assumes certain CPU features that may not be available on all ARM64 implementations, particularly on embedded and older systems. Using the system allocator is safer and more compatible. Platform support: - OpenBSD x64: Uses mimalloc with local_dynamic_tls - OpenBSD arm64: Uses system allocator (no mimalloc) Ref: rollup#5478 Ref: rollup#6047

vercel · 2025-11-05T19:15:15Z

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vercel · 2025-11-07T16:05:38Z

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lukastaegert

Thanks. Unfortunately, this does not seem to build out-of-the-box. Not sure if you can see the job logs, this is the failure

2025-11-07T16:14:33.139Z napi:build Start building crate: bindings_napi
2025-11-07T16:14:33.139Z napi:build   cargo build --target x86_64-unknown-openbsd --release -Zbuild-std=std,core,alloc,panic_unwind -Zbuild-std-features=panic-unwind
[cross] warning: `cross` does not provide a Docker image for target x86_64-unknown-openbsd, specify a custom image in `Cross.toml`.
[cross] error: Errors encountered before cross compilation, aborting.
[cross] note: Disable this with `CROSS_NO_WARNINGS=0`
Internal Error: Build failed with exit code 1
    at ChildProcess.<anonymous> (file:///home/runner/work/rollup/rollup/node_modules/@napi-rs/cli/dist/cli.js:1436:36)
    at Object.onceWrapper (node:events:623:26)
    at ChildProcess.emit (node:events:520:35)
    at ChildProcess._handle.onexit (node:internal/child_process:294:12)
Error: Process completed with exit code 1.

and similarly for aarch64-unknown-openbsd.

cross-rs does not support OpenBSD targets (only FreeBSD, NetBSD, DragonFly). This commit creates a separate build-openbsd job that uses cross-platform-actions/action to build natively on OpenBSD via QEMU. Changes: - Remove OpenBSD from main build matrix (cross doesn't support it) - Add new build-openbsd job using cross-platform-actions/action v0.25.0 - Build on OpenBSD 7.6 for both x86-64 and arm64 architectures - Install Rust nightly-2025-07-25 and build with -Zbuild-std - Add build-openbsd to needs: dependencies in smoke-test, test, and publish jobs This approach is similar to how FreeBSD was initially supported before cross-rs added FreeBSD support. Ref: rollup#5478

OpenBSD 7.8 is the current stable release. Update build configuration to use 7.8 instead of 7.6.

rpx99 · 2025-11-10T18:39:11Z

@lukastaegert Thanks! I tried again and updated.

This commit fixes multiple issues with the OpenBSD build: 1. Update cross-platform-actions from v0.25.0 to v0.30.0 - v0.30.0 adds native support for OpenBSD 7.8 - Fixes 404 errors when downloading resources 2. Fix sort-keys ESLint error in native.js - Move openbsd entry between linux and openharmony (alphabetical order) - Required by eslint sort-keys rule 3. Use native cargo build instead of npm run build:napi - Avoid cross-compilation issues and GLIBC errors - Build directly with cargo in OpenBSD VM - Automatically find and rename the built library file The build now runs natively on OpenBSD 7.8 via QEMU without attempting to use Linux build tools or cross-compilation. Ref: rollup#5478

Improve the build script to properly find and copy the built library: - Change directory back to root after cargo build - Use find to locate the library file dynamically - Add error handling if library is not found This fixes path issues in the previous commit.

…xvUN3r2tz

Align the build-openbsd job with other jobs in the workflow that already use actions/checkout@v5.0.1 instead of v5.0.0. This ensures consistency across all workflow jobs.

…xvUN3r2tz

OpenBSD does not support rustup (error: unrecognized OS type: OpenBSD). This commit switches to using OpenBSD's native Rust package via pkg_add. Changes: - Replace rustup installation with 'pkg_add rust' - Remove nightly toolchain requirement (use stable Rust from OpenBSD) - Temporarily override rust-toolchain.toml during build - Remove -Zbuild-std flags (not needed for native builds) - Add gcc and gmake dependencies for native compilation OpenBSD packages provide a recent enough Rust version for building the project, and the standard library is already available for the native target. Fixes the error: error: unrecognized OS type: OpenBSD Ref: rollup#5478 Ref: rust-lang/rustup#2377

lukastaegert · 2026-01-22T05:21:46Z

x64 support for OpenBSD has been implemented by now in #6224, not sure if you want to further pursue arm64 support. Otherwise, we should probably close this.

ikmckenz · 2026-03-14T02:33:09Z

I'm interested in arm64 support, perhaps I'll open a new PR for just arm since amd4 is already implemented.

Edit: Looks like #6247 already exists, just needs a small change.

claude added 2 commits November 5, 2025 18:58

Merge branch 'master' into claude/add-openbsd-support-011CUqES9GgQZrm…

417289b

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vercel Bot deployed to Preview November 7, 2025 16:06 View deployment

lukastaegert reviewed Nov 7, 2025

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lukastaegert force-pushed the master branch 2 times, most recently from 5369863 to 96b5453 Compare November 7, 2025 21:32

claude added 2 commits November 9, 2025 16:43

chore: Update OpenBSD version to 7.8

15fa8ee

OpenBSD 7.8 is the current stable release. Update build configuration to use 7.8 instead of 7.6.

vercel Bot deployed to Preview November 15, 2025 06:41 View deployment

claude and others added 4 commits November 20, 2025 20:11

Merge branch 'master' into claude/add-openbsd-support-011CUqES9GgQZrm…

d2f7538

…xvUN3r2tz

Merge branch 'master' into claude/add-openbsd-support-011CUqES9GgQZrm…

6ebf18f

…xvUN3r2tz

vercel Bot had a problem deploying to Preview November 22, 2025 06:16 Failure

claude and others added 3 commits November 22, 2025 07:44

chore: Update checkout action to v5.0.1 in build-openbsd job

5cccdad

Align the build-openbsd job with other jobs in the workflow that already use actions/checkout@v5.0.1 instead of v5.0.0. This ensures consistency across all workflow jobs.

Merge branch 'master' into claude/add-openbsd-support-011CUqES9GgQZrm…

4d52b82

…xvUN3r2tz

vercel Bot deployed to Preview November 25, 2025 05:07 View deployment

lukastaegert mentioned this pull request Dec 28, 2025

OpenBSD support #6224

Merged

9 tasks

mdellison90-stack approved these changes Jan 22, 2026

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ikmckenz mentioned this pull request Mar 14, 2026

Support OpenBSD #6302

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feat: Add OpenBSD support for x64 and arm64 architectures#6163

feat: Add OpenBSD support for x64 and arm64 architectures#6163
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rpx99 commented Nov 5, 2025

Summary

Changes

Platform Support

Files Modified

Memory Allocator Configuration

Implementation Details

mimalloc Safety

Build Process

OpenBSD Considerations

Related Issues

Test Plan

Breaking Changes

Notes

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