# Bindgen Cuda
[](https://crates.io/crates/bindgen_cuda)
[](https://docs.rs/bindgen_cuda)
Similar crate than [bindgen](https://github.com/rust-lang/rust-bindgen) in philosophy.
It will help create automatic bindgen to cuda kernels source files and make them easier to use
directly from Rust.
## PTX inclusion
Let's say you have a file
`src/cuda.cu`
```cuda
__global__ void cuda_hello(){
printf("Hello World from GPU!\n");
}
```
You can add `bindgen_cuda` as a build dependency:
```bash
cargo add --build bindgen_cuda
```
And then create this `build.rs`
```no_run
fn main() {
let builder = bindgen_cuda::Builder::default();
let bindings = builder.build_ptx().unwrap();
bindings.write("src/lib.rs");
}
```
This will create a src file containing the following code:
```ignore
pub const CUDA: &str = include_str!(concat!(env!("OUT_DIR"), "/cuda.ptx"));
```
You can then use the PTX directly in your rust code with a library like [cudarc](https://github.com/coreylowman/cudarc/).
## Raw cuda calls
Alternatively you can build a static library that you can link against in build.rs in order to call cuda directly with the c code.
`src/cuda.cu`
```cuda
__global__ void cuda_hello(){
printf("Hello World from GPU!\n");
}
int run() {
cuda_hello<<<1,1>>>();
return 0;
}
```
Then write the `build.rs`:
```no_run
fn main() {
let builder = bindgen_cuda::Builder::default();
builder.build_lib("libcuda.a");
println!("cargo:rustc-link-lib=cuda");
}
```
Which you can then interface through FFI in `src/lib.rs`:
```no_run
extern "C" {
fn cuda_hello();
}
fn main(){
unsafe{ cuda_hello();}
}
```