cortex-m-semihosting 0.6.0

Semihosting for ARM Cortex-M processors
Documentation 
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use std::env;

fn main() {
    let target = env::var("TARGET").unwrap();

    println!("cargo:rustc-check-cfg=cfg(thumb)");
    if target.starts_with("thumbv") {
        println!("cargo:rustc-cfg=thumb");
    }
}