Fix LD-environment variable

reid/examples/cli.rs

@@ -55,7 +55,8 @@ fn main() -> Result<(), std::io::Error> {
                 );
 
                 println!("Linking {:?}", &object_path);
-                let linker = option_env!("LD").unwrap_or("ld").to_owned();
+
+                let linker = std::env::var("LD").unwrap_or("ld".to_owned());
                 let mut linker = LDRunner::from_command(linker).with_library("c".to_owned());
                 for library in libraries {
                     linker = linker.with_library(library);

reid/src/ld.rs

@@ -1,4 +1,4 @@
-use std::{io::Read, path::PathBuf, process::Command};
+use std::{path::PathBuf, process::Command};
 
 pub struct LDRunner {
     command: String,