1 files changed, 24 insertions, 15 deletions
diff --git a/compiler/rustc_codegen_cranelift/scripts/cargo-clif.rs b/compiler/rustc_codegen_cranelift/scripts/cargo-clif.rs
index e2db7d03a..99b97be24 100644
--- a/compiler/rustc_codegen_cranelift/scripts/cargo-clif.rs
+++ b/compiler/rustc_codegen_cranelift/scripts/cargo-clif.rs
@@ -12,24 +12,33 @@ fn main() {
 
     let mut rustflags = String::new();
     rustflags.push_str(" -Cpanic=abort -Zpanic-abort-tests -Zcodegen-backend=");
-    rustflags.push_str(
-        sysroot
-            .join(if cfg!(windows) { "bin" } else { "lib" })
-            .join(
-                env::consts::DLL_PREFIX.to_string()
-                    + "rustc_codegen_cranelift"
-                    + env::consts::DLL_SUFFIX,
-            )
-            .to_str()
-            .unwrap(),
-    );
+    if let Some(name) = option_env!("BUILTIN_BACKEND") {
+        rustflags.push_str(name);
+    } else {
+        rustflags.push_str(
+            sysroot
+                .join(if cfg!(windows) { "bin" } else { "lib" })
+                .join(
+                    env::consts::DLL_PREFIX.to_string()
+                        + "rustc_codegen_cranelift"
+                        + env::consts::DLL_SUFFIX,
+                )
+                .to_str()
+                .unwrap(),
+        );
+    }
     rustflags.push_str(" --sysroot ");
     rustflags.push_str(sysroot.to_str().unwrap());
     env::set_var("RUSTFLAGS", env::var("RUSTFLAGS").unwrap_or(String::new()) + &rustflags);
     env::set_var("RUSTDOCFLAGS", env::var("RUSTDOCFLAGS").unwrap_or(String::new()) + &rustflags);
 
-    // Ensure that the right toolchain is used
-    env::set_var("RUSTUP_TOOLCHAIN", env!("TOOLCHAIN_NAME"));
+    let cargo = if let Some(cargo) = option_env!("CARGO") {
+        cargo
+    } else {
+        // Ensure that the right toolchain is used
+        env::set_var("RUSTUP_TOOLCHAIN", option_env!("TOOLCHAIN_NAME").expect("TOOLCHAIN_NAME"));
+        "cargo"
+    };
 
     let args: Vec<_> = match env::args().nth(1).as_deref() {
         Some("jit") => {
@@ -64,10 +73,10 @@ fn main() {
     };
 
     #[cfg(unix)]
-    panic!("Failed to spawn cargo: {}", Command::new("cargo").args(args).exec());
+    panic!("Failed to spawn cargo: {}", Command::new(cargo).args(args).exec());
 
     #[cfg(not(unix))]
     std::process::exit(
-        Command::new("cargo").args(args).spawn().unwrap().wait().unwrap().code().unwrap_or(1),
+        Command::new(cargo).args(args).spawn().unwrap().wait().unwrap().code().unwrap_or(1),
     );
 }