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/drogon/default.nix

@@ -0,0 +1,63 @@
+{ stdenv, fetchFromGitHub, cmake, jsoncpp, libossp_uuid, zlib, lib
+# optional but of negligible size
+, openssl, brotli, c-ares
+# optional databases
+, sqliteSupport ? true, sqlite
+, postgresSupport ? false, postgresql
+, redisSupport ? false, hiredis
+, mysqlSupport ? false, libmysqlclient, mariadb }:
+
+stdenv.mkDerivation rec {
+  pname = "drogon";
+  version = "1.7.5";
+
+  src = fetchFromGitHub {
+    owner = "drogonframework";
+    repo = "drogon";
+    rev = "v${version}";
+    sha256 = "sha256-DrpaXUaoO35DgmX8cYb3kbXfd6PlqI6pjEKnroiRxvg=";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [
+    "-DBUILD_TESTING=${if doInstallCheck then "ON" else "OFF"}"
+    "-DBUILD_EXAMPLES=OFF"
+  ];
+
+  propagatedBuildInputs = [
+    jsoncpp
+    libossp_uuid
+    zlib
+    openssl
+    brotli
+    c-ares
+  ] ++ lib.optional sqliteSupport sqlite
+    ++ lib.optional postgresSupport postgresql
+    ++ lib.optional redisSupport hiredis
+    # drogon uses mariadb for mysql (see https://github.com/drogonframework/drogon/wiki/ENG-02-Installation#Library-Dependencies)
+    ++ lib.optional mysqlSupport [ libmysqlclient mariadb ];
+
+  patches = [
+    # this part of the test would normally fail because it attempts to configure a CMake project that uses find_package on itself
+    # this patch makes drogon and trantor visible to the test
+    ./fix_find_package.patch
+  ];
+
+  # modifying PATH here makes drogon_ctl visible to the test
+  installCheckPhase = ''
+    cd ..
+    PATH=$PATH:$out/bin bash test.sh
+  '';
+
+  doInstallCheck = true;
+
+  meta = with lib; {
+    homepage = "https://github.com/drogonframework/drogon";
+    description = "C++14/17 based HTTP web application framework";
+    license = licenses.mit;
+    maintainers = with maintainers; [ urlordjames ];
+    platforms = platforms.all;
+  };
+}

pkgs/development/libraries/drogon/fix_find_package.patch

@@ -0,0 +1,13 @@
+diff --git a/test.sh b/test.sh
+index f017b9a..027031e 100755
+--- a/test.sh
++++ b/test.sh
+@@ -135,7 +135,7 @@ if [ $os = "windows" ]; then
+   conan install $src_dir -s compiler="Visual Studio" -s compiler.version=16 -sbuild_type=Debug -g cmake_paths
+   cmake_gen="$cmake_gen -DCMAKE_TOOLCHAIN_FILE=conan_paths.cmake -DCMAKE_INSTALL_PREFIX=$src_dir/install"
+ fi
+-cmake .. $cmake_gen
++cmake .. $cmake_gen -DDrogon_DIR=$out/lib/cmake/Drogon -DTrantor_DIR=$out/lib/cmake/Trantor
+ 
+ if [ $? -ne 0 ]; then
+     echo "Failed to run CMake for example project"