[clang] [libclang/python] Ensure all library functions are registered (PR #140015)

[Jannick Kremer via cfe-commits]

https://github.com/DeinAlptraum created https://github.com/llvm/llvm-project/pull/140015

Add a few library functions that were not previously registered to the `CDLL` object. The current behavior relies on the default `restype` to work.

Add a test to check that all library functions are properly registered. This is not 100% reliable: for a yet unkown reason, `clang_getCursorTLSKind` is not in the list of attributes of the library object, despite working as intended even when not registered.

>From c3c0adfe4a7dce3568a81594588be53d761b5980 Mon Sep 17 00:00:00 2001
From: Jannick Kremer <jannick.kremer at mailbox.org>
Date: Thu, 15 May 2025 15:58:00 +0900
Subject: [PATCH] [libclang/python] Ensure all library functions are registered

---
 clang/bindings/python/tests/cindex/test_lib.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 clang/bindings/python/tests/cindex/test_lib.py

diff --git a/clang/bindings/python/tests/cindex/test_lib.py b/clang/bindings/python/tests/cindex/test_lib.py
new file mode 100644
index 0000000000000..f8f892731500b
--- /dev/null
+++ b/clang/bindings/python/tests/cindex/test_lib.py
@@ -0,0 +1,17 @@
+import os
+
+from clang.cindex import Config, conf, FUNCTION_LIST
+
+if "CLANG_LIBRARY_PATH" in os.environ:
+    Config.set_library_path(os.environ["CLANG_LIBRARY_PATH"])
+
+import unittest
+
+
+class TestIndex(unittest.TestCase):
+    def test_functions_registered(self):
+        IGNORED = set(["_FuncPtr", "_name", "_handle"])
+        lib_functions = set(vars(conf.lib).keys())
+        registered_functions = set([item[0] for item in FUNCTION_LIST])
+        unregistered_functions = lib_functions - registered_functions - IGNORED
+        self.assertEqual(unregistered_functions, set())