fixup! dependencies/clang: Add a dependency for Clang

mesonbuild/dependencies/detect.py

@@ -41,7 +41,7 @@ def __contains__(self, key: object) -> bool:
 def get_dep_identifier(name: str, kwargs: T.Dict[str, T.Any]) -> 'TV_DepID':
     identifier: 'TV_DepID' = (('name', name), )
     from ..interpreter import permitted_dependency_kwargs
-    assert len(permitted_dependency_kwargs) == 19, \
+    assert len(permitted_dependency_kwargs) == 20, \
            'Extra kwargs have been added to dependency(), please review if it makes sense to handle it here'
     for key, value in kwargs.items():
         # 'version' is irrelevant for caching; the caller must check version matches
@@ -54,7 +54,7 @@ def get_dep_identifier(name: str, kwargs: T.Dict[str, T.Any]) -> 'TV_DepID':
         # 'not_found_message' has no impact on the dependency lookup
         # 'include_type' is handled after the dependency lookup
         if key in {'version', 'native', 'required', 'fallback', 'allow_fallback', 'default_options',
-                   'not_found_message', 'include_type'}:
+                   'not_found_message', 'include_type', 'llvm'}:
             continue
         # All keyword arguments are strings, ints, or lists (or lists of lists)
         if isinstance(value, list):

mesonbuild/dependencies/dev.py

@@ -641,7 +641,7 @@ def __init__(self, name: str, env: Environment, kwargs: T.Dict[str, T.Any], lang
                 self.is_found = True
                 return
 
-            mlog.debug(f'Could not find Clang in {search}, because of version mismatch, '
+            mlog.debug(f'Could not use Clang in {search}, because of version mismatch, '
                        f'required {", ".join(self.version_reqs)}, version: {version}')
 
     def log_details(self) -> str:

mesonbuild/interpreter/interpreter.py

@@ -242,6 +242,7 @@ class InterpreterRuleRelaxation(Enum):
     'fallback',
     'include_type',
     'language',
+    'llvm',
     'main',
     'method',
     'modules',