python312Packages.meinheld: fix build with GCC (#373119)

pkgs/development/python-modules/meinheld/default.nix

···
 {
   lib,
+  stdenv,
+  pythonAtLeast,
   fetchPypi,
   buildPythonPackage,
+  setuptools,
   greenlet,
 }:
 
 buildPythonPackage rec {
   pname = "meinheld";
   version = "1.0.2";
-  format = "setuptools";
+  pyproject = true;
+
+  disabled = pythonAtLeast "3.13";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "008c76937ac2117cc69e032dc69cea9f85fc605de9bac1417f447c41c16a56d6";
+    hash = "sha256-AIx2k3rCEXzGngMtxpzqn4X8YF3pusFBf0R8QcFqVtY=";
   };
 
-  patchPhase = ''
-    # Allow greenlet-1.0.0.
-    # See https://github.com/mopemope/meinheld/pull/123
-    substituteInPlace setup.py --replace "greenlet>=0.4.5,<0.5" "greenlet>=0.4.5"
-  '';
+  pythonRelaxDeps = [ "greenlet" ];
+
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-Wno-error=implicit-function-declaration";
+
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [ greenlet ];
+  dependencies = [ greenlet ];
 
   # No tests
   doCheck = false;
 
   pythonImportsCheck = [ "meinheld" ];
 
-  meta = with lib; {
+  meta = {
     description = "High performance asynchronous Python WSGI Web Server";
     homepage = "https://meinheld.org/";
-    license = licenses.bsd3;
+    license = lib.licenses.bsd3;
   };
 }