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build.rs
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build.rs
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use std::path::PathBuf;
fn main() {
println!("cargo:rerun-if-changed=build.rs");
#[cfg(not(feature = "ci-check"))]
link_cuda();
}
#[allow(unused)]
fn link_cuda() {
println!("cargo:rerun-if-env-changed=CUDA_ROOT");
println!("cargo:rerun-if-env-changed=CUDA_PATH");
println!("cargo:rerun-if-env-changed=CUDA_TOOLKIT_ROOT_DIR");
for path in libs(root().expect("Cuda root not found")) {
println!("cargo:rustc-link-search=native={}", path.display());
}
#[cfg(feature = "driver")]
println!("cargo:rustc-link-lib=dylib=cuda");
#[cfg(feature = "driver")]
println!("cargo:rustc-link-lib=dylib=cudart");
#[cfg(feature = "nvrtc")]
println!("cargo:rustc-link-lib=dylib=nvrtc");
#[cfg(feature = "curand")]
println!("cargo:rustc-link-lib=dylib=curand");
#[cfg(feature = "cublas")]
println!("cargo:rustc-link-lib=dylib=cublas");
#[cfg(feature = "cublas")]
println!("cargo:rustc-link-lib=dylib=cublasLt");
}
fn root() -> Option<PathBuf> {
let env_vars = ["CUDA_PATH", "CUDA_ROOT", "CUDA_TOOLKIT_ROOT_DIR"];
let roots = [
"/usr/local/cuda",
"/opt/cuda",
"/usr/lib/cuda",
"C:/Program Files/NVIDIA GPU Computing Toolkit",
"C:/CUDA",
];
let env_vars = env_vars.iter().map(std::env::var).filter_map(Result::ok);
let roots = roots.iter().cloned().map(Into::into);
let mut candidates = env_vars.chain(roots).map(Into::<PathBuf>::into);
candidates.find(|path| path.join("include").join("cuda.h").is_file())
}
fn libs(root: PathBuf) -> Vec<PathBuf> {
[
"lib/x64",
"lib/Win32",
"lib/x86_64",
"lib64",
"lib64/stubs",
"targets/x86_64-linux",
"targets/x86_64-linux/lib",
"targets/x86_64-linux/lib/stubs",
]
.iter()
.map(|&p| root.join(p))
.filter(|p| p.is_dir())
.collect()
}