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/tk/generic.nix

@@ -0,0 +1,64 @@
+{ stdenv, lib, src, pkg-config, tcl, libXft, patches ? []
+, enableAqua ? stdenv.isDarwin, darwin
+, ... }:
+
+tcl.mkTclDerivation {
+  pname = "tk";
+  version = tcl.version;
+
+  inherit src patches;
+
+  outputs = [ "out" "man" "dev" ];
+
+  setOutputFlags = false;
+
+  preConfigure = ''
+    configureFlagsArray+=(--mandir=$man/share/man --enable-man-symlinks)
+    cd unix
+  '';
+
+  postPatch = ''
+    for file in $(find library/demos/. -type f ! -name "*.*"); do
+      substituteInPlace $file --replace "exec wish" "exec $out/bin/wish"
+    done
+  '';
+
+  postInstall = ''
+    ln -s $out/bin/wish* $out/bin/wish
+    cp ../{unix,generic}/*.h $out/include
+    ln -s $out/lib/libtk${tcl.release}${stdenv.hostPlatform.extensions.sharedLibrary} $out/lib/libtk${stdenv.hostPlatform.extensions.sharedLibrary}
+  ''
+  + lib.optionalString (stdenv.isDarwin) ''
+    cp ../macosx/*.h $out/include
+  '';
+
+  configureFlags = [
+    "--enable-threads"
+  ] ++ lib.optional stdenv.is64bit "--enable-64bit"
+    ++ lib.optional enableAqua "--enable-aqua";
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = lib.optional enableAqua (with darwin.apple_sdk.frameworks; [ Cocoa ]);
+
+  propagatedBuildInputs = [ libXft ];
+
+  enableParallelBuilding = true;
+
+  doCheck = false; # fails. can't find itself
+
+  inherit tcl;
+
+  passthru = rec {
+    inherit (tcl) release version;
+    libPrefix = "tk${tcl.release}";
+    libdir = "lib/${libPrefix}";
+  };
+
+  meta = with lib; {
+    description = "A widget toolkit that provides a library of basic elements for building a GUI in many different programming languages";
+    homepage = "https://www.tcl.tk/";
+    license = licenses.tcltk;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ lovek323 vrthra ];
+  };
+}