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T1: scaffold repo + Rust/CUDA build chain (vecadd smoke test)

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Stand up the xtrain project skeleton: a Cargo workspace mirroring xserv's
csrc/ + crates/ layout, with a single xtrain-cuda crate that wraps the CUDA
Runtime over hand-written extern "C" FFI. build.rs compiles csrc/test/vecadd.cu
via the cc crate targeting sm_120 (RTX 5090) and links cudart.

A gated integration test runs the vector-add kernel on the GPU and asserts the
result. When nvcc is absent (local GPU-less machine), build.rs skips CUDA
compilation and sets a `no_cuda` cfg so host-side cargo check still works.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Gahow Wang
2026-06-15 14:42:43 +08:00
commit 92acf9f413
13 changed files with 376 additions and 0 deletions
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Cargo.toml Normal file
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[workspace]
resolver = "2"
members = [
"crates/xtrain-cuda",
]
[workspace.package]
version = "0.1.0"
edition = "2024"
license = "MIT"