rust: zephyr-sys: Fixup clang targets for RISCV

use std::path::{Path, PathBuf};

fn main() -> Result<()> {

    // Determine which version of Clang we linked with.

    let version = bindgen::clang_version();

    println!("Clang version: {:?}", version);

    // Pass in the target used to build the native code.

    let target_arg = format!("--target={}", env::var("TARGET")?);

    let target = env::var("TARGET")?;

    // Rustc uses some complex target tuples for the riscv targets, whereas clang uses other

    // options.  Fortunately, these variants shouldn't affect the structures generated, so just

    // turn this into a generic target.

    let target = if target.starts_with("riscv32") {

        "riscv32-unknown-none-elf".to_string()

    } else {

        target

    };

    // Likewise, do the same with RISCV-64.

    let target = if target.starts_with("riscv64") {

        "riscv64-unknown-none-elf".to_string()

    } else {

        target

    };

    let target_arg = format!("--target={}", target);

    // println!("includes: {:?}", env::var("INCLUDE_DIRS"));

    // println!("defines: {:?}", env::var("INCLUDE_DEFINES"));