--- mesonbuild/compilers/mixins/clang.py.orig	2024-09-28 13:52:12.000000000 -0500
+++ mesonbuild/compilers/mixins/clang.py	2024-09-28 13:52:12.000000000 -0500
@@ -106,7 +106,7 @@
         myargs: T.List[str] = ['-Werror=implicit-function-declaration']
         if mode is CompileCheckMode.COMPILE:
             myargs.extend(['-Werror=unknown-warning-option', '-Werror=unused-command-line-argument'])
-            if mesonlib.version_compare(self.version, '>=3.6.0'):
+            if mesonlib.version_compare(self.version, '>=9.6.0'):
                 myargs.append('-Werror=ignored-optimization-argument')
         return super().get_compiler_check_args(mode) + myargs