rust: override get_linker_always_args

instead of opencoding what should be there in the rust compile rule

mesonbuild/backend/ninjabackend.py

@@ -1582,8 +1582,7 @@ int dummy;
         # Rust is super annoying, calling -C link-arg foo does not work, it has
         # to be -C link-arg=foo
         if cratetype in {'bin', 'dylib'}:
-            for a in rustc.linker.get_always_args():
-                args += ['-C', f'link-arg={a}']
+            args.extend(rustc.get_linker_always_args())
 
         opt_proxy = self.get_compiler_options_for_target(target)
 

mesonbuild/compilers/rust.py

@@ -162,3 +162,9 @@ class RustCompiler(Compiler):
         if colortype in {'always', 'never', 'auto'}:
             return [f'--color={colortype}']
         raise MesonException(f'Invalid color type for rust {colortype}')
+
+    def get_linker_always_args(self) -> T.List[str]:
+        args: T.List[str] = []
+        for a in super().get_linker_always_args():
+            args.extend(['-C', f'link-arg={a}'])
+        return args