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/grpc/default.nix

@@ -0,0 +1,106 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, fetchpatch
+, buildPackages
+, cmake
+, zlib
+, c-ares
+, pkg-config
+, re2
+, openssl
+, protobuf
+, grpc
+, abseil-cpp
+, libnsl
+
+# tests
+, python3
+}:
+
+stdenv.mkDerivation rec {
+  pname = "grpc";
+  version = "1.46.3"; # N.B: if you change this, please update:
+    # pythonPackages.grpcio-tools
+    # pythonPackages.grpcio-status
+
+  src = fetchFromGitHub {
+    owner = "grpc";
+    repo = "grpc";
+    rev = "v${version}";
+    sha256 = "sha256-RiXtKlRtlbqwrSxI904dgSu3da0A6Fwk+/hWHIG7A5E=";
+    fetchSubmodules = true;
+  };
+
+  patches = [
+    # Fix build on armv6l (https://github.com/grpc/grpc/pull/21341)
+    (fetchpatch {
+      url = "https://github.com/grpc/grpc/commit/2f4cf1d9265c8e10fb834f0794d0e4f3ec5ae10e.patch";
+      sha256 = "0ams3jmgh9yzwmxcg4ifb34znamr7pb4qm0609kvil9xqvkqz963";
+    })
+
+    # Revert gRPC C++ Mutex to be an alias of Abseil, because it breaks dependent packages
+    (fetchpatch {
+      url = "https://github.com/grpc/grpc/commit/931f91b745cd5b2864a0d1787815871d0bd844ae.patch";
+      sha256 = "0vc93g2i4982ys4gzyaxdv9ni25yk10sxq3n7fkz8dypy8sylck7";
+      revert = true;
+    })
+  ];
+
+  nativeBuildInputs = [ cmake pkg-config ]
+    ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) grpc;
+  propagatedBuildInputs = [ c-ares re2 zlib abseil-cpp ];
+  buildInputs = [ c-ares.cmake-config openssl protobuf ]
+    ++ lib.optionals stdenv.isLinux [ libnsl ];
+
+  cmakeFlags = [
+    "-DgRPC_ZLIB_PROVIDER=package"
+    "-DgRPC_CARES_PROVIDER=package"
+    "-DgRPC_RE2_PROVIDER=package"
+    "-DgRPC_SSL_PROVIDER=package"
+    "-DgRPC_PROTOBUF_PROVIDER=package"
+    "-DgRPC_ABSL_PROVIDER=package"
+    "-DBUILD_SHARED_LIBS=ON"
+    "-DCMAKE_SKIP_BUILD_RPATH=OFF"
+  ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    "-D_gRPC_PROTOBUF_PROTOC_EXECUTABLE=${buildPackages.protobuf}/bin/protoc"
+  ] ++ lib.optionals ((stdenv.hostPlatform.useLLVM or false) && lib.versionOlder stdenv.cc.cc.version "11.0") [
+    # Needs to be compiled with -std=c++11 for clang < 11. Interestingly this is
+    # only an issue with the useLLVM stdenv, not the darwin stdenv…
+    # https://github.com/grpc/grpc/issues/26473#issuecomment-860885484
+    "-DCMAKE_CXX_STANDARD=11"
+  ];
+
+  # CMake creates a build directory by default, this conflicts with the
+  # basel BUILD file on case-insensitive filesystems.
+  preConfigure = ''
+    rm -vf BUILD
+  '';
+
+  # When natively compiling, grpc_cpp_plugin is executed from the build directory,
+  # needing to load dynamic libraries from the build directory, so we set
+  # LD_LIBRARY_PATH to enable this. When cross compiling we need to avoid this,
+  # since it can cause the grpc_cpp_plugin executable from buildPackages to
+  # crash if build and host architecture are compatible (e. g. pkgsLLVM).
+  preBuild = lib.optionalString (stdenv.hostPlatform == stdenv.buildPlatform) ''
+    export LD_LIBRARY_PATH=$(pwd)''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH
+  '';
+
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=unknown-warning-option"
+    + lib.optionalString stdenv.isAarch64 "-Wno-error=format-security";
+
+  enableParallelBuilds = true;
+
+  passthru.tests = {
+    inherit (python3.pkgs) grpcio-status grpcio-tools;
+  };
+
+  meta = with lib; {
+    description = "The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ lnl7 marsam ];
+    homepage = "https://grpc.io/";
+    platforms = platforms.all;
+    changelog = "https://github.com/grpc/grpc/releases/tag/v${version}";
+  };
+}