diff --git a/mesonbuild/compilers/mixins/metrowerks.py b/mesonbuild/compilers/mixins/metrowerks.py
index 8934e8376f42..60982212e241 100644
--- a/mesonbuild/compilers/mixins/metrowerks.py
+++ b/mesonbuild/compilers/mixins/metrowerks.py
@@ -179,13 +179,12 @@ def __init__(self) -> None:
         self.base_options = {
             OptionKey(o) for o in ['b_pch', 'b_ndebug']}
 
-        default_warn_args: T.List[str] = []
         self.warn_args: T.Dict[str, T.List[str]] = {
-            '0': ['-w', 'off'],
-            '1': default_warn_args,
-            '2': default_warn_args + ['-w', 'most'],
-            '3': default_warn_args + ['-w', 'all'],
-            'everything': default_warn_args + ['-w', 'full']}
+            '0': ['-warnings', 'off'],
+            '1': [],
+            '2': ['-warnings', 'on,nocmdline'],
+            '3': ['-warnings', 'on,all'],
+            'everything': ['-warnings', 'on,full']}
 
     def depfile_for_object(self, objfile: str) -> T.Optional[str]:
         # Earlier versions of these compilers do not support specifying
@@ -275,6 +274,6 @@ def _unix_args_to_native(cls, args: T.List[str], info: MachineInfo) -> T.List[st
     def compute_parameters_with_absolute_paths(self, parameter_list: T.List[str], build_dir: str) -> T.List[str]:
         for idx, i in enumerate(parameter_list):
             if i[:2] == '-I':
-                parameter_list[idx] = i[:9] + os.path.normpath(os.path.join(build_dir, i[9:]))
+                parameter_list[idx] = i[:2] + os.path.normpath(os.path.join(build_dir, i[2:]))
 
         return parameter_list
diff --git a/mesonbuild/linkers/linkers.py b/mesonbuild/linkers/linkers.py
index dc42b3a2032f..c4df0fa1d893 100644
--- a/mesonbuild/linkers/linkers.py
+++ b/mesonbuild/linkers/linkers.py
@@ -1637,9 +1637,6 @@ def get_allow_undefined_args(self) -> T.List[str]:
     def get_accepts_rsp(self) -> bool:
         return True
 
-    def get_lib_prefix(self) -> str:
-        return ""
-
     def get_linker_always_args(self) -> T.List[str]:
         return []
 
@@ -1652,8 +1649,9 @@ def get_search_args(self, dirname: str) -> T.List[str]:
     def invoked_by_compiler(self) -> bool:
         return False
 
-    def rsp_file_syntax(self) -> RSPFileSyntax:
-        return RSPFileSyntax.GCC
+    def get_soname_args(self, env: 'Environment', prefix: str, shlib_name: str,
+                        suffix: str, soversion: str, darwin_versions: T.Tuple[str, str]) -> T.List[str]:
+        raise MesonException(f'{self.id} does not support shared libraries.')
 
 
 class MetrowerksLinkerARM(MetrowerksLinker):