experimental: build script with linker file arg

src/libboard_artiq/build.rs

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

src/libbuild_zynq/lib.rs

@@ -4,18 +4,21 @@ use std::io::Write;
 use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
 
-fn cfg() {
-    // 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());
+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);
+    }
 
-    // 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");
 
     // Handle rustc-cfg file
     let cfg_path = "../../build/rustc-cfg";

src/runtime/build.rs

@@ -1,5 +1,5 @@
 extern crate build_zynq;
 
 fn main() {
-    build_zynq::cfg();
+    build_zynq::cfg(Some("link.x"));
 }

src/satman/build.rs

@@ -1,5 +1,5 @@
 extern crate build_zynq;
 
 fn main() {
-    build_zynq::cfg();
+    build_zynq::cfg(Some("satman.ld"));
 }