x86-64 wheel crashes on CPUs without AVX support (SIGILL / go/sigill-fail-fast)

[rabestro]

Description

The google-antigravity package (v0.1.7) ships a native Go binary in the manylinux_2_17_x86_64 wheel that is compiled with AVX instruction set support (GOAMD64=v3). This causes an immediate crash on x86-64 CPUs that do not support AVX instructions.

Error Message

FATAL ERROR: This binary was compiled with avx enabled, but this feature is not available on this processor (go/sigill-fail-fast)

Affected Hardware

This affects a significant class of x86-64 processors that lack AVX support, including:

• Intel Celeron (J3455, J4125, N5105, etc.) — commonly found in NAS devices
• Intel Atom series
• Older Intel Xeon and Core processors (pre-Haswell, before 2013)
• Some AMD processors (pre-Bulldozer)

These processors are widely used in home servers, NAS appliances (Synology, QNAP), and budget server hardware.

Steps to Reproduce

1. Install google-antigravity on a machine with a CPU without AVX support (e.g., Synology NAS with Intel Celeron J3455)
2. Import and use the package:

   from google.antigravity import Agent

3. The process crashes with SIGILL (Illegal Instruction)

Expected Behavior

The package should work on any x86-64 processor, or at minimum provide a clear error message suggesting hardware requirements.

Suggested Fix

Compile the Go binary with GOAMD64=v1 (baseline x86-64, no AVX/AVX2/SSE4 requirements) instead of GOAMD64=v3. This would ensure compatibility with all x86-64 processors while maintaining full functionality (with a minor performance trade-off on newer hardware).

Alternatively, consider shipping two wheel variants:

• manylinux_2_17_x86_64 — baseline build (GOAMD64=v1)
• An optimized variant for modern CPUs

Context

This issue was reported by a user of paperless-genie (which depends on google-antigravity) running Docker on a Synology NAS: rabestro/paperless-genie#79.

Environment

• google-antigravity version: 0.1.7
• Wheel: google_antigravity-0.1.7-py3-none-manylinux_2_17_x86_64.whl
• OS: Debian Bookworm (Docker container)
• CPU: Intel Celeron (no AVX support)