libnscd: fix build with glibc 2.26

Tracking issue: #31696

pkgs/os-specific/linux/libnscd/default.nix

@@ -1,13 +1,17 @@
 {stdenv, fetchurl}:
-   
+
 stdenv.mkDerivation {
   name = "libnscd-2.0.2";
-   
+
   src = fetchurl {
     url = http://ftp.suse.com/pub/people/kukuk/libnscd/libnscd-2.0.2.tar.bz2;
     sha256 = "0nxhwy42x44jlpdb5xq1prbvfjmds4hplmwv3687z0c4r9rn506l";
   };
 
+  patches = [ ./libnscd-2.0.2-glibc-2.26.patch ];
+
+  NIX_CFLAGS_COMPILE = [ "-Wno-cast-qual" ];
+
   meta = {
     platforms = stdenv.lib.platforms.linux;
   };

pkgs/os-specific/linux/libnscd/libnscd-2.0.2-glibc-2.26.patch

@@ -0,0 +1,12 @@
+diff --git a/src/libnscd.c b/src/libnscd.c
+index 5e1d3fd..73cb122 100644
+--- a/src/libnscd.c
++++ b/src/libnscd.c
+@@ -27,6 +27,7 @@
+ #include <unistd.h>
+ #include <sys/socket.h>
+ #include <sys/un.h>
++#include <sys/uio.h>
+ 
+ #include "libnscd.h"
+