build.rs

//! Set up linker scripts for the rp235x-hal examples

use std::fs::File;
use std::io::Write;
use std::path::PathBuf;

fn main() {
    // Put the linker script somewhere the linker can find it
    let out = PathBuf::from(std::env::var_os("OUT_DIR").unwrap());
    println!("cargo:rustc-link-search={}", out.display());

    // The file `memory.x` is loaded by cortex-m-rt's `link.x` script, which
    // is what we specify in `.cargo/config.toml` for Arm builds
    #[cfg(feature = "rp2040")]
    let memory_x = include_bytes!("memory_rp2040.x");
    #[cfg(feature = "rp235x")]
    let memory_x = include_bytes!("memory_rp235x.x");
    #[cfg(not(any(feature = "rp2040", feature = "rp235x")))]
    compile_error!("No target feature enabled");

    let mut f = File::create(out.join("memory.x")).unwrap();
    f.write_all(memory_x).unwrap();
    println!("cargo:rerun-if-changed=memory.x");

    /*
    // The file `rp235x_riscv.x` is what we specify in `.cargo/config.toml` for
    // RISC-V builds
    let rp235x_riscv_x = include_bytes!("rp235x_riscv.x");
    let mut f = File::create(out.join("rp235x_riscv.x")).unwrap();
    f.write_all(rp235x_riscv_x).unwrap();
    println!("cargo:rerun-if-changed=rp235x_riscv.x");
    */

    println!("cargo:rerun-if-changed=build.rs");
}