Dockerfile.avx512

# ndarray — AVX-512 pinned build (server/Railway)
# target-cpu=x86-64-v4: native AVX-512, all SIMD inlined, no LazyLock dispatch.
# ~24% faster than portable build (780 vs 630 on L1 kernel benchmarks).
#
# ONLY deploy on AVX-512 hardware (Skylake-X, Ice Lake, Sapphire Rapids, EPYC Genoa).
# Will SIGILL on older CPUs.
#
# CPU detection & SIMD dispatch documentation: see Dockerfile.md
# Portable (AVX2) variant: see Dockerfile
#
# Build: docker build -f Dockerfile.avx512 -t ndarray-avx512 .
# Run:   docker run --rm ndarray-avx512

FROM debian:bookworm-slim AS builder

RUN apt-get update && apt-get install -y --no-install-recommends \
    curl ca-certificates gcc libc6-dev pkg-config libssl-dev \
    && rm -rf /var/lib/apt/lists/*

ENV RUSTUP_HOME=/usr/local/rustup \
    CARGO_HOME=/usr/local/cargo \
    PATH=/usr/local/cargo/bin:$PATH
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
    sh -s -- -y --default-toolchain 1.94.0 --profile minimal \
    && rustc --version | grep -q "1.94.0"

WORKDIR /app

COPY Cargo.toml Cargo.lock ./
COPY ndarray-rand/Cargo.toml ndarray-rand/Cargo.toml
COPY crates/ crates/
COPY src/ src/
COPY ndarray-rand/src/ ndarray-rand/src/

# AVX-512 pinned: compile-time dispatch, everything inlined
ENV RUSTFLAGS="-C target-cpu=x86-64-v4"

RUN cargo build --release 2>&1 && echo "=== AVX-512 BUILD OK ==="
RUN cargo build --release --features jit-native 2>&1 && echo "=== AVX-512 JIT BUILD OK ==="
RUN cargo test --release --lib -- hpc:: 2>&1 && echo "=== AVX-512 HPC TESTS OK ==="

FROM debian:bookworm-slim
COPY --from=builder /app/target/release/libndarray.rlib /usr/local/lib/
CMD ["echo", "ndarray AVX-512 build verified — Rust 1.94.0, target-cpu=x86-64-v4"]