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/compilers/mozart/default.nix

@@ -0,0 +1,89 @@
+{ lib
+, fetchFromGitHub
+, fetchurl
+, cmake
+, unzip
+, makeWrapper
+, boost169
+, pinnedBoost ? boost169
+, llvmPackages
+, llvmPackages_5
+, gmp
+, emacs
+, jre_headless
+, tcl
+, tk
+}:
+
+let stdenv = llvmPackages.stdenv;
+
+in stdenv.mkDerivation rec {
+  pname = "mozart2";
+  version = "2.0.1";
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "https://github.com/mozart/mozart2/releases/download/v${version}/${name}-Source.zip";
+    sha256 = "1mad9z5yzzix87cdb05lmif3960vngh180s2mb66cj5gwh5h9dll";
+  };
+
+  # This is a workaround to avoid using sbt.
+  # I guess it is acceptable to fetch the bootstrapping compiler in binary form.
+  bootcompiler = fetchurl {
+    url = "https://github.com/layus/mozart2/releases/download/v2.0.0-beta.1/bootcompiler.jar";
+    sha256 = "1hgh1a8hgzgr6781as4c4rc52m2wbazdlw3646s57c719g5xphjz";
+  };
+
+  postConfigure = ''
+    cp ${bootcompiler} bootcompiler/bootcompiler.jar
+  '';
+
+  nativeBuildInputs = [ cmake makeWrapper unzip ];
+
+  # We cannot compile with both gcc and clang, but we need clang during the
+  # process, so we compile everything with clang.
+  # BUT, we need clang4 for parsing, and a more recent clang for compiling.
+  cmakeFlags = [
+    "-DCMAKE_CXX_COMPILER=${llvmPackages.clang}/bin/clang++"
+    "-DCMAKE_C_COMPILER=${llvmPackages.clang}/bin/clang"
+    "-DBoost_USE_STATIC_LIBS=OFF"
+    "-DMOZART_BOOST_USE_STATIC_LIBS=OFF"
+    "-DCMAKE_PROGRAM_PATH=${llvmPackages_5.clang}/bin"
+    # Rationale: Nix's cc-wrapper needs to see a compile flag (like -c) to
+    # infer that it is not a linking call, and stop trashing the command line
+    # with linker flags.
+    # As it does not recognise -emit-ast, we pass -c immediately overridden
+    # by -emit-ast.
+    # The remaining is just the default flags that we cannot reuse and need
+    # to repeat here.
+    "-DMOZART_GENERATOR_FLAGS='-c;-emit-ast;--std=c++0x;-Wno-invalid-noreturn;-Wno-return-type;-Wno-braced-scalar-init'"
+    # We are building with clang, as nix does not support having clang and
+    # gcc together as compilers and we need clang for the sources generation.
+    # However, clang emits tons of warnings about gcc's atomic-base library.
+    "-DCMAKE_CXX_FLAGS=-Wno-braced-scalar-init"
+  ];
+
+  fixupPhase = ''
+    wrapProgram $out/bin/oz --set OZEMACS ${emacs}/bin/emacs
+  '';
+
+  buildInputs = [
+    pinnedBoost
+    llvmPackages_5.llvm
+    llvmPackages_5.clang
+    llvmPackages_5.clang-unwrapped
+    gmp
+    emacs
+    jre_headless
+    tcl
+    tk
+  ];
+
+  meta = {
+    description = "An open source implementation of Oz 3";
+    maintainers = [ lib.maintainers.layus ];
+    license = lib.licenses.bsd2;
+    homepage = "https://mozart.github.io";
+  };
+
+}