Making a bunch of basic programs cross-buildable.

After this, the 'bootstrap-tools' can be cross-built.


svn path=/nixpkgs/branches/stdenv-updates/; revision=20945

pkgs/tools/compression/bzip2/default.nix

@@ -10,6 +10,16 @@ stdenv.mkDerivation {
     sha256 = "08py2s9vw6dgw457lbklh1vsr3b8x8dlv7d8ygdfaxlx61l57gzp";
   };
 
+  crossAttrs = {
+    patchPhase = ''
+      sed -i -e 's/CC=gcc/CC=${stdenv.cross.config}-gcc/' \
+        -e 's/AR=ar/AR=${stdenv.cross.config}-ar/' \
+        -e 's/RANLIB=ranlib/RANLIB=${stdenv.cross.config}-ranlib/' \
+        -e 's/bzip2recover test/bzip2recover/' \
+        Makefile*
+    '';
+  };
+
   sharedLibrary =
     !stdenv.isDarwin && !(stdenv ? isDietLibC) && !(stdenv ? isStatic) && stdenv.system != "i686-cygwin" && !linkStatic;