Added initial OpenBSD support to the stdenv

svn path=/nixpkgs/trunk/; revision=17362

pkgs/stdenv/native/default.nix

@@ -33,6 +33,18 @@ rec {
     export NIX_GCC_NEEDS_GREP=1
   '';
 
+  prehookOpenBSD = builtins.toFile "prehook-openbsd.sh" ''
+    source ${prehookBase}
+    
+    alias make=gmake
+    alias grep=ggrep
+    export MAKE=gmake
+    shopt -s expand_aliases
+
+    # Filter out stupid GCC warnings (in gcc-wrapper).
+    export NIX_GCC_NEEDS_GREP=1
+  '';
+
   prehookCygwin = builtins.toFile "prehook-cygwin.sh" ''
     source ${prehookBase}
     
@@ -55,6 +67,7 @@ rec {
       preHook =
         if system == "i686-darwin" || system == "powerpc-darwin" then prehookDarwin else
         if system == "i686-freebsd" then prehookFreeBSD else
+        if system == "i686-openbsd" then prehookOpenBSD else
         prehookBase;
 
       initialPath = extraPath ++ path;