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build(cudnn-sys): Add CUDNN_INCLUDE_DIR #213

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Merged
LegNeato merged 2 commits into from
May 21, 2025
Merged

build(cudnn-sys): Add CUDNN_INCLUDE_DIR #213

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26e0b97
build(cudnn-sys): Add CUDNN_INCLUDE_DIR
giantcow May 13, 2025
2cfca20
more idiomatic
giantcow May 20, 2025
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16 changes: 13 additions & 3 deletions crates/cudnn-sys/build/cudnn_sdk.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
use std::env;
use std::error;
use std::fs;
use std::path;
use std::path::Path;

/// Represents the cuDNN SDK installation.
#[derive(Debug, Clone)]
Expand Down Expand Up @@ -57,17 +59,25 @@ impl CudnnSdk {
}

fn find_cudnn_include_dir() -> Result<path::PathBuf, Box<dyn error::Error>> {
let cudnn_include_dir = env::var_os("CUDNN_INCLUDE_DIR");

#[cfg(not(target_os = "windows"))]
const CUDNN_DEFAULT_PATHS: &[&str] = &["/usr/include", "/usr/local/include"];
#[cfg(target_os = "windows")]
const CUDNN_DEFAULT_PATHS: &[&str] = &[
"C:/Program Files/NVIDIA/CUDNN/v9.x/include",
"C:/Program Files/NVIDIA/CUDNN/v8.x/include",
];
CUDNN_DEFAULT_PATHS

let mut cudnn_paths: Vec<&Path> = CUDNN_DEFAULT_PATHS.iter().map(Path::new).collect();
if let Some(override_path) = &cudnn_include_dir {
cudnn_paths.push(Path::new(override_path));
}

cudnn_paths
.iter()
.find(|s| Self::is_cudnn_include_path(s))
.map(path::PathBuf::from)
.find(|p| Self::is_cudnn_include_path(p))
.map(|p| p.to_path_buf())
.ok_or("Cannot find cuDNN include directory.".into())
}

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