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/applications/science/math/ripser/default.nix

@@ -0,0 +1,58 @@
+{ lib, stdenv, fetchFromGitHub
+, useCoefficients ? false
+, indicateProgress ? false
+, useGoogleHashmap ? false, sparsehash ? null
+, fileFormat ? "lowerTriangularCsv"
+}:
+
+with lib;
+
+assert assertOneOf "fileFormat" fileFormat
+  ["lowerTriangularCsv" "upperTriangularCsv" "dipha"];
+assert useGoogleHashmap -> sparsehash != null;
+
+let
+  inherit (lib) optional;
+  version = "1.2.1";
+in
+stdenv.mkDerivation {
+  pname = "ripser";
+  inherit version;
+
+  src = fetchFromGitHub {
+    owner = "Ripser";
+    repo = "ripser";
+    rev = "v${version}";
+    sha256 = "sha256-BxmkPQ/nl5cF+xwQMTjXnLgkLgdmT/39y7Kzl2wDfpE=";
+  };
+
+  buildInputs = optional useGoogleHashmap sparsehash;
+
+  buildFlags = [
+    "-std=c++11"
+    "-O3"
+    "-D NDEBUG"
+  ]
+  ++ optional useCoefficients "-D USE_COEFFICIENTS"
+  ++ optional indicateProgress "-D INDICATE_PROGRESS"
+  ++ optional useGoogleHashmap "-D USE_GOOGLE_HASHMAP"
+  ++ optional (fileFormat == "lowerTriangularCsv") "-D FILE_FORMAT_LOWER_TRIANGULAR_CSV"
+  ++ optional (fileFormat == "upperTriangularCsv") "-D FILE_FORMAT_UPPER_TRIANGULAR_CSV"
+  ++ optional (fileFormat == "dipha") "-D FILE_FORMAT_DIPHA"
+  ;
+
+  buildPhase = "c++ ripser.cpp -o ripser $buildFlags";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp ripser $out/bin
+  '';
+
+  meta = {
+    description = "A lean C++ code for the computation of Vietoris–Rips persistence barcodes";
+    homepage = "https://github.com/Ripser/ripser";
+    license = lib.licenses.lgpl3;
+    maintainers = with lib.maintainers; [erikryb];
+    platforms = lib.platforms.linux;
+  };
+}