* Started reorganising stdenv:

- gcc/ld-wrappers have been factored out into a separate
    derivation.  This allows a working gcc to be installed in the user
    environment.  (Previously the Nix gcc didn't work because it
    needed a whole bunch of flags to point to glibc.)
    
  - Better modularity: packages can specify hooks into the setup
    scripts.  For instance, setup no longer knows about the
    PKG_CONFIG_PATH variable; pkgconfig can set it up instead.

  - gcc not longer depends on binutils.  This simplifies the bootstrap
    process.

svn path=/nixpkgs/trunk/; revision=816

pkgs/stdenv/native/default.nix

@@ -1,13 +1,17 @@
-{system}: (import ../generic) {
+{stdenv}:
+
+(import ../generic) {
   name = "stdenv-native";
-  system = system;
-  prehook = ./prehook.sh;
-  posthook = ./posthook.sh;
+  preHook = ./prehook.sh;
+  postHook = ./posthook.sh;
   initialPath = "/usr/local /usr /";
-  param1 = "";
-  param2 = "";
-  param3 = "";
-  param4 = "";
-  param5 = "";
-  noSysDirs = false;
+
+  inherit stdenv;
+
+  gcc = (import ../../build-support/gcc-wrapper) {
+    inherit stdenv;
+    name = "gcc-native";
+    isNative = true;
+    gcc = "/usr";
+  };
 }

pkgs/stdenv/native/prehook.sh

@@ -1,5 +1 @@
 export SHELL=/bin/sh
-
-export NIX_CC=/usr/bin/gcc
-export NIX_CXX=/usr/bin/g++
-export NIX_LD=/usr/bin/ld