pythonPackages.libasyncns: fix build with glibc-2.25

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

@@ -0,0 +1,25 @@
+{ stdenv, buildPythonPackage, fetchurl
+, libasyncns, pkgconfig }:
+
+buildPythonPackage rec {
+  name = "libasyncns-python-${version}";
+  version = "0.7.1";
+
+  src = fetchurl {
+    url = "https://launchpad.net/libasyncns-python/trunk/${version}/+download/libasyncns-python-${version}.tar.bz2";
+    sha256 = "1q4l71b2h9q756x4pjynp6kczr2d8c1jvbdp982hf7xzv7w5gxqg";
+  };
+
+  patches = [ ./libasyncns-fix-res-consts.patch ];
+
+  buildInputs = [ libasyncns ];
+  nativeBuildInputs = [ pkgconfig ];
+  doCheck = false; # requires network access
+
+  meta = with stdenv.lib; {
+    description = "libasyncns-python is a python binding for the asynchronous name service query library";
+    license = licenses.lgpl21;
+    maintainers = [ maintainers.mic92 ];
+    homepage = https://launchpad.net/libasyncns-python;
+  };
+}

pkgs/development/python-modules/libasyncns/libasyncns-fix-res-consts.patch

@@ -0,0 +1,14 @@
+diff --git a/libasyncns.c b/libasyncns.c
+index 99a73de..85709b0 100644
+--- a/libasyncns.c
++++ b/libasyncns.c
+@@ -134,9 +134,8 @@ PyMODINIT_FUNC initlibasyncns(void)
+ 	ADDNSCONST(ns_t_mailb);
+ 	ADDNSCONST(ns_t_maila);
+ 	ADDNSCONST(ns_t_any);
+-	ADDNSCONST(ns_t_zxfr);
+ 	ADDNSCONST(ns_t_max);
+ 	
+ 	ADDNSCONST(ns_c_invalid);
+ 	ADDNSCONST(ns_c_in);
+ 	ADDNSCONST(ns_c_2);