Add linker option to run-make-support

Author: ChrisDenton

src/tools/run-make-support/src/rustc.rs

@@ -203,6 +203,12 @@ impl Rustc {
         self
     }
 
+    /// Specify the linker
+    pub fn linker(&mut self, linker: &str) -> &mut Self {
+        self.cmd.arg(format!("-Clinker={linker}"));
+        self
+    }
+
     /// Get the [`Output`][::std::process::Output] of the finished process.
     #[track_caller]
     pub fn command_output(&mut self) -> ::std::process::Output {

tests/run-make/windows-safeseh/rmake.rs

@@ -6,10 +6,10 @@ use run_make_support::rustc;
 fn main() {
     // Ensure that LLD can link when an .rlib contains a synthetic object
     // file referencing exported or used symbols.
-    rustc().input("foo.rs").arg("-Clinker=rust-lld").run();
+    rustc().input("foo.rs").linker("rust-lld").run();
 
     // Ensure that LLD can link when /WHOLEARCHIVE: is used with an .rlib.
     // Previously, lib.rmeta was not marked as (trivially) SAFESEH-aware.
     rustc().input("baz.rs").run();
-    rustc().input("bar.rs").arg("-Clinker=rust-lld").link_arg("/WHOLEARCHIVE:libbaz.rlib").run();
+    rustc().input("bar.rs").linker("rust-lld").link_arg("/WHOLEARCHIVE:libbaz.rlib").run();
 }