Adding a new mkDerivation flag for the cross stdenv, selfNativeBuildInput =

true/false, which tells whether the derivation needs itself as
buildNativeInput.
For example, in order to build cross ncurses, we need the a native build
ncurses.
(As libtool does not work in stdenv, I have not tested this change, to check
whether finally ncurses cross-build)


svn path=/nixpkgs/branches/stdenv-updates/; revision=18489

pkgs/development/libraries/ncurses/default.nix

@@ -12,6 +12,8 @@ stdenv.mkDerivation rec {
     --with-shared --includedir=''${out}/include --without-debug
     ${if unicode then "--enable-widec" else ""}
   '';
+
+  selfNativeBuildInput = true;
     
   preBuild = ''sed -e "s@\([[:space:]]\)sh @\1''${SHELL} @" -i */Makefile Makefile'';