[Bug] ARM64/aarch64 Linux Build Fails Due to gaol Library Syscall Compatibility Issues

[ZacharyArthur]

Issue Summary

Claudia currently cannot build on ARM64/aarch64 Linux systems due to syscall compatibility limitations in the gaol sandboxing library
dependency. This affects users on ARM64 Linux platforms who would like to use Claudia.

Environment Details

• Platform: ARM64/aarch64 Linux
• OS: Ubuntu 24.04 LTS (likely affects other ARM64 Linux distributions)
• Architecture: aarch64-unknown-linux-gnu
• Claudia Version: Current main branch

Technical Background

The challenge stems from ARM64 Linux using a different syscall architecture than x86/x86_64. ARM64 doesn't provide many "legacy" syscalls and
instead uses modernized variants:

Syscall Differences on ARM64:

• poll → ppoll
• epoll_wait → epoll_pwait
• open → openat
• access → faccessat
• readlink → readlinkat
• stat → fstat

Current Build Behavior

When attempting to build on ARM64 Linux:

error[E0425]: cannot find value SYS_poll in module libc
--> platform/linux/seccomp.rs:163:5
|
163 | SYS_poll as u32,
| ^^^^^^^^ not found in libc

Workaround Available

For those needing ARM64 support currently, there's a fork of gaol that addresses these syscall compatibility issues I made:

Temporary workaround in src-tauri/Cargo.toml

[patch.crates-io]
gaol = { git = "https://github.com/ZacharyArthur/gaol", branch = "fix-aarch64-syscalls" }

This patch adds conditional compilation for ARM64-specific syscall mappings and resolves the build issues.

Impact & User Base

Potentially Affected Users:

• ARM64 Linux developers
• Apple Silicon Mac users running Linux
• Raspberry Pi and edge computing developers
• ARM-based server deployments

Suggested Path Forward

It would be valuable for the claudia project to investigate ARM64 Linux support, potentially through:

1. Research: Evaluating the syscall compatibility requirements for ARM64
2. Upstream collaboration: Working with the gaol maintainers on proper ARM64 support
3. Alternative approaches: Exploring other sandboxing solutions that have native ARM64 support
4. CI integration: Adding ARM64 testing to catch future compatibility issues

Priority Consideration

With the growing adoption of ARM64 in development environments (Apple Silicon, AWS Graviton instances, etc.), ARM64 Linux support could
benefit a significant portion of the developer community.

[ZacharyArthur]

Just going to close since this project seems busy and this affects a very small user base.