* 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/test/simple/builder.sh

@@ -0,0 +1,41 @@
+#! /bin/sh
+
+export NIX_DEBUG=1
+
+. $stdenv/setup
+
+export NIX_CFLAGS_COMPILE="-v $NIX_CFLAGS_COMPILE"
+
+mkdir $out
+mkdir $out/bin
+
+cat > hello.c <<EOF
+#include <stdio.h>
+
+int main(int argc, char * * argv)
+{
+    printf("Hello World!\n");
+    return 0;
+}
+EOF
+
+gcc hello.c -o $out/bin/hello
+
+$out/bin/hello
+
+cat > hello2.cc <<EOF
+#include <iostream>
+
+int main(int argc, char * * argv)
+{
+    std::cout << "Hello World!\n";
+    std::cout << VALUE << std::endl;
+    return 0;
+}
+EOF
+
+g++ hello2.cc -o $out/bin/hello2 -DVALUE="1 + 2 * 3"
+
+$out/bin/hello2
+
+ld -v

pkgs/test/simple/default.nix

@@ -0,0 +1,18 @@
+let {
+  system = "i686-linux";
+
+  stdenvInitial = (import ../../stdenv/initial) {
+    name = "stdenv-initial";
+    inherit system;
+  };
+
+  stdenv = (import ../../stdenv/native) {stdenv = stdenvInitial;};
+
+  test = derivation {
+    name = "simple-test";
+    inherit system stdenv;
+    builder = ./builder.sh;
+  };
+
+  body = test;
+}