reverted build script with linker file arg. Hybrid solution.

src/libboard_artiq/build.rs

@@ -1,5 +1,5 @@
 extern crate build_zynq;
 
 fn main() {
-    build_zynq::cfg(None);
+    build_zynq::cfg();
 }

src/libbuild_zynq/lib.rs

@@ -4,22 +4,7 @@ use std::io::Write;
 use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
 
-pub fn cfg(linker_script: Option<str>) {
-    if let Some(script_file) = &linker_script {
-        // Put the linker script somewhere the linker can find it
-        let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
-        File::create(out.join(script_file))
-            .unwrap()
-            .write_all(include_bytes!(script_file))
-            .unwrap();
-        println!("cargo:rustc-link-search={}", out.display());
-
-        // Only re-run the build script when link.x is changed,
-        // instead of when any part of the source code changes.
-        println!("cargo:rerun-if-changed={}". script_file);
-    }
-
-
+pub fn cfg() {
     // Handle rustc-cfg file
     let cfg_path = "../../build/rustc-cfg";
     println!("cargo:rerun-if-changed={}", cfg_path);

src/runtime/build.rs

@@ -1,5 +1,20 @@
+use std::env;
+use std::fs::File;
+use std::path::PathBuf;
+
 extern crate build_zynq;
 
 fn main() {
-    build_zynq::cfg(Some("link.x"));
+    // Put the linker script somewhere the linker can find it
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("link.x"))
+        .unwrap()
+        .write_all(include_bytes!("link.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // Only re-run the build script when link.x is changed,
+    // instead of when any part of the source code changes.
+    println!("cargo:rerun-if-changed=link.x");
+    build_zynq::cfg();
 }

src/satman/build.rs

@@ -1,5 +1,20 @@
+use std::env;
+use std::fs::File;
+use std::path::PathBuf;
+
 extern crate build_zynq;
 
 fn main() {
-    build_zynq::cfg(Some("satman.ld"));
+    // Put the linker script somewhere the linker can find it
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("satman.ld"))
+        .unwrap()
+        .write_all(include_bytes!("satman.ld"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // Only re-run the build script when link.x is changed,
+    // instead of when any part of the source code changes.
+    println!("cargo:rerun-if-changed=satman.ld");
+    build_zynq::cfg();
 }