A patch for binutils >= 2.21 has already been incorporated into the official package [1], so there's no need for `ocaml-patched-binutils` [2].
Thanks! [1] http://projects.archlinux.org/svntogit/packages.git/tree/trunk/fix-ocaml-binutils-2.21.patch?h=packages/ocaml [2] https://aur.archlinux.org/packages.php?ID=48826
