(zilch lang rust): more fixes

lang/rust/helpers/src/bin/false.rs

@@ -0,0 +1,6 @@
+use std::{env::args, process::exit};
+
+fn main() {
+    eprintln!("cargo stub called with {:?}", args());
+    exit(1);
+}

lang/rust/helpers/src/bin/rustc-wrapper.rs

@@ -1,6 +1,7 @@
 use std::{
     collections::HashMap,
-    env::{args, var_os},
+    env::{args, var, var_os},
+    fs::File,
     io::Read,
     os::unix::process::CommandExt,
     process::Command,
@@ -88,9 +89,24 @@ fn parse(data: &str) -> Data {
 
 fn main() {
     let mut cmd = Command::new(var_os("_zilch_rustc").unwrap());
+
+    if let Ok(data) = var("_zilch_inherit") {
+        if !data.is_empty() {
+            for item in data.split(' ') {
+                let mut file = File::open(item).unwrap();
+                let mut data = String::new();
+                file.read_to_string(&mut data).unwrap();
+                let data = parse(&data);
+                for item in data.link_search {
+                    cmd.arg("-L").arg(item);
+                }
+            }
+        }
+    }
+
     if let Some(proc) = var_os("_zilch_proc") {
         if !proc.is_empty() {
-            let mut file = std::fs::File::open(proc).unwrap();
+            let mut file = File::open(proc).unwrap();
             let mut data = String::new();
             file.read_to_string(&mut data).unwrap();
             let data = parse(&data);