obrah 3.1.2

High-level Rust wrapper around OpenCL using OBWIO
Documentation 
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use std::path::Path;

fn main() {
    let clpath = Path::new("C:\\Windows\\System32\\OpenCL.dll");
    if clpath.exists() {
       	println!("cargo:rustc-link-lib=OpenCL");
    } else {
        // Try to read the environment variable OPENCL_SDK.
        if let Ok(path) = std::env::var("OPENCL_SDK") {
      	    println!("cargo:rustc-link-search=native={}/lib", path);
            println!("cargo:rustc-link-lib=dylib=OpenCL");
        } else {
            println!("cargo:error=Environment variable OPENCL_SDK not set. Set it to your OpenCL SDK path.");
        }
    }
}