linkers: fix LLD linker response file handling

Correct base classes so GNU-like linkers all default to supporting response files.

mesonbuild/linkers/linkers.py

@@ -611,6 +611,9 @@ def _apply_prefix(self, arg: T.Union[str, T.List[str]]) -> T.List[str]: ...
         "boot_application": "16",
     }
 
+    def get_accepts_rsp(self) -> bool:
+        return True
+
     def get_buildtype_args(self, buildtype: str) -> T.List[str]:
         # We can override these in children by just overriding the
         # _BUILDTYPE_ARGS value.
@@ -846,9 +849,6 @@ class GnuDynamicLinker(GnuLikeDynamicLinkerMixin, PosixDynamicLinkerMixin, Dynam
 
     """Representation of GNU ld.bfd and ld.gold."""
 
-    def get_accepts_rsp(self) -> bool:
-        return True
-
 
 class GnuGoldDynamicLinker(GnuDynamicLinker):
 

unittests/allplatformstests.py

@@ -4853,3 +4853,24 @@ def test_c_cpp_stds(self):
             # The first supported std should be selected
             self.setconf('-Dcpp_std=c++11,gnu++11,vc++11')
             self.assertEqual(self.getconf('cpp_std'), 'c++11')
+
+    def test_rsp_support(self):
+        env = get_fake_env()
+        cc = detect_c_compiler(env, MachineChoice.HOST)
+        if cc.linker.id in {
+            'ld.bfd',
+            'ld.gold',
+            'ld.lld',
+            'ld.mold',
+            'ld.qcld',
+            'ld.wasm',
+            'link',
+            'lld-link',
+            'mwldarm',
+            'mwldeppc',
+            'optlink',
+            'xilink',
+        }:
+            assert cc.linker.get_accepts_rsp() == True
+        else:
+            assert cc.linker.get_accepts_rsp() == False