Making busybox cross build with kernel 2.4 for mipsel (I had to disable 'ionice', which

requires some headers >= 2.6.12).

I also add the kernel 2.4 headers expression I forgot in my last commit.

svn path=/nixpkgs/trunk/; revision=20540

pkgs/misc/busybox/default.nix

@@ -25,6 +25,9 @@ stdenv.mkDerivation {
   crossAttrs = {
     configurePhase = basicConfigure + ''
       sed -i 's,.*CONFIG_CROSS_COMPILER_PREFIX.*,CONFIG_CROSS_COMPILER_PREFIX="'$crossConfig-'",' .config
-    '';
+    '' +
+      (if (stdenv.cross.platform.kernelMajor == "2.4") then ''
+        sed -i 's,.*CONFIG_IONICE.*,CONFIG_IONICE=n,' .config
+      '' else "");
   };
 }