change emit condition

Signed-off-by: xizheyin <[email protected]>

Author: xizheyin

compiler/rustc_codegen_ssa/src/errors.rs

@@ -457,7 +457,7 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for LinkingFailed<'_> {
             diag.note("some arguments are omitted. use `--verbose` to show all linker arguments");
         }
 
-        diag.note(self.escaped_output);
+        diag.note(self.escaped_output.clone());
 
         // Trying to match an error from OS linkers
         // which by now we have no way to translate.
@@ -469,7 +469,7 @@ impl<G: EmissionGuarantee> Diagnostic<'_, G> for LinkingFailed<'_> {
                 diag.note(fluent::codegen_ssa_use_cargo_directive);
             }
         }
-        if self.linker_path.display().to_string().contains("cc") {
+        if self.escaped_output.contains("unable to find library -lLLVM-") {
             diag.help("consider adding the llvm-tools component to your rustup installation");
         }
         diag