uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/libspf2/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, fetchpatch }:
+
+with lib;
+
+stdenv.mkDerivation rec {
+  pname = "libspf2";
+  version = "2.2.12";
+
+  src = fetchFromGitHub {
+    owner = "helsinki-systems";
+    repo = "libspf2";
+    rev = "v${version}";
+    sha256 = "03iiaafdcwh220pqignk407h6klrakwz0zkb8iwk6nkwipkwvhsx";
+  };
+
+  patches = [
+    # glibc-2.34 compat
+    (fetchpatch {
+      url = "https://raw.githubusercontent.com/gentoo/gentoo/dbb8a5c9f749cc11e61cfe558f164b165cbc30cb/mail-filter/libspf2/files/libspf2-1.2.11-undefined-dn_.patch";
+      sha256 = "sha256-6JVVkVGCcFJsNeBdVTPcLhW4KoHLY4ai/KXDMliXgPA=";
+    })
+  ];
+
+  postPatch = ''
+    # disable static bins compilation
+    sed -i \
+      -e '/bin_PROGRAMS/s/spfquery_static//' src/spfquery/Makefile.am \
+      -e '/bin_PROGRAMS/s/spftest_static//' src/spftest/Makefile.am \
+      -e '/bin_PROGRAMS/s/spfd_static//' src/spfd/Makefile.am \
+      -e '/bin_PROGRAMS/s/spf_example_static//' src/spf_example/Makefile.am
+  '';
+
+  # autoreconf necessary because we modified automake files
+  nativeBuildInputs = [ autoreconfHook ];
+
+  doCheck = true;
+
+  meta = {
+    description = "Implementation of the Sender Policy Framework for SMTP " +
+                  "authorization (Helsinki Systems fork)";
+    homepage = "https://github.com/helsinki-systems/libspf2";
+    license = with licenses; [ lgpl21Plus bsd2 ];
+    maintainers = with maintainers; [ pacien ajs124 das_j ];
+    platforms = platforms.all;
+  };
+}