Trying to make nixUnstable cross-build.

It fails because it builds bin2c for the host system, instead of the build system.
I will wait for a fix upstream.

svn path=/nixpkgs/trunk/; revision=20445

pkgs/development/libraries/openssl/default.nix

@@ -1,5 +1,11 @@
 { stdenv, fetchurl, perl }:
 
+let
+  opensslCrossSystem = stdenv.lib.attrByPath [ "openssl" "system" ]
+    (throw "openssl needs its platform name cross building" null)
+    stdenv.cross;
+in
+
 stdenv.mkDerivation rec {
   name = "openssl-0.9.8l";
   
@@ -10,12 +16,24 @@ stdenv.mkDerivation rec {
 
   patches = [ ./darwin-arch.patch ];
   
-  buildInputs = [ perl ];
+  buildNativeInputs = [ perl ];
 
   configureScript = "./config";
   
   configureFlags = "shared";
 
+  crossAttrs = {
+    configurePhase = ''
+      export cross=$crossSystem-
+      ./Configure --prefix=$out ${opensslCrossSystem} shared
+    '';
+    buildPhase = ''
+      make CC=$crossConfig-gcc \
+        AR="$crossConfig-ar r" \
+        RANLIB=$crossConfig-ranlib
+    '';
+  };
+
   meta = {
     homepage = http://www.openssl.org/;
     description = "A cryptographic library that implements the SSL and TLS protocols";