- Change CGO files to use luxgpu tag (opt-in)
- Change pure Go files to use !luxgpu tag (default)
- Fix relative paths to luxcpp/crypto headers
This allows CGO=0 and CGO=1 builds to work without requiring
the full GPU libraries to be installed.
Add stub implementations for GPU packages that return
false for Available() when GPU libraries are not present.
This allows building with CGO_ENABLED=0 or CGO_ENABLED=1
without requiring Metal/CUDA libraries.
- bls/gpu/gpu_stub.go
- hash/blake3/gpu/gpu_stub.go
- hash/poseidon2/gpu/gpu_stub.go
- pqcrypto/*/gpu/gpu_stub.go (mldsa, mlkem, slhdsa)
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