py-frozendict: patch up for Python 3.11

See also Marco-Sulla/python-frozendict#68, rely on a pure Python
implementation when 3.11+ is used.

Author: matz-e

var/spack/repos/builtin/packages/py-frozendict/package.py

@@ -14,8 +14,14 @@ class PyFrozendict(PythonPackage):
 
     license("LGPL-3.0-only")
 
+    version("2.3.10", sha256="aadc83510ce82751a0bb3575231f778bc37cbb373f5f05a52b888e26cbb92f79")
     version("2.3.4", sha256="15b4b18346259392b0d27598f240e9390fafbff882137a9c48a1e0104fb17f78")
     version("1.2", sha256="774179f22db2ef8a106e9c38d4d1f8503864603db08de2e33be5b778230f6e45")
 
     depends_on("[email protected]:", type=("build", "run"))
     depends_on("py-setuptools", type="build")
+
+    def setup_build_environment(self, env):
+        # C extension is not supported for 3.11+
+        if self.spec.satisfies("^[email protected]:"):
+            env.set("FROZENDICT_PURE_PY", "1")