Setting the gcc --with-arch=fuloong2f only on mips64-linux. (what was there before was

a temporary change not representing a working stdenv)

svn path=/nixpkgs/branches/stdenv-updates/; revision=23589

pkgs/development/compilers/gcc-4.5/default.nix

@@ -235,7 +235,8 @@ stdenv.mkDerivation ({
         )
       )
     }
-    ${"--with-arch=loongson2f"}
+    ${ # Trick that should be taken out once we have a mips64-linux not loongson2f
+      if cross == null && stdenv.system == "mips64-linux" then "--with-arch=loongson2f" else ""}
     ${if langAda then " --enable-libada" else ""}
     ${if (cross == null && stdenv.isi686) then "--with-arch=i686" else ""}
     ${if cross != null then crossConfigureFlags else ""}