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/logic/klee/klee-uclibc.nix

@@ -0,0 +1,98 @@
+{ lib
+, fetchurl
+, fetchFromGitHub
+, which
+, linuxHeaders
+, clang_9
+, llvmPackages_9
+, python3
+, debugRuntime ? true
+, runtimeAsserts ? false
+, extraKleeuClibcConfig ? {}
+}:
+
+let
+  localeSrcBase = "uClibc-locale-030818.tgz";
+  localeSrc = fetchurl {
+    url = "http://www.uclibc.org/downloads/${localeSrcBase}";
+    sha256 = "xDYr4xijjxjZjcz0YtItlbq5LwVUi7k/ZSmP6a+uvVc=";
+  };
+  resolvedExtraKleeuClibcConfig = lib.mapAttrsToList (name: value: "${name}=${value}") (extraKleeuClibcConfig // {
+    "UCLIBC_DOWNLOAD_PREGENERATED_LOCALE_DATA" = "n";
+    "RUNTIME_PREFIX" = "/";
+    "DEVEL_PREFIX" = "/";
+  });
+in
+clang_9.stdenv.mkDerivation rec {
+  pname = "klee-uclibc";
+  version = "1.2";
+  src = fetchFromGitHub {
+    owner = "klee";
+    repo = "klee-uclibc";
+    rev = "klee_uclibc_v${version}";
+    sha256 = "qdrGMw+2XwpDsfxdv6swnoaoACcF5a/RWgUxUYbtPrI=";
+  };
+  nativeBuildInputs = [
+    clang_9
+    llvmPackages_9.llvm
+    python3
+    which
+  ];
+
+  # Some uClibc sources depend on Linux headers.
+  UCLIBC_KERNEL_HEADERS = "${linuxHeaders}/include";
+
+  # HACK: needed for cross-compile.
+  # See https://www.mail-archive.com/klee-dev@imperial.ac.uk/msg03141.html
+  KLEE_CFLAGS = "-idirafter ${clang_9}/resource-root/include";
+
+  prePatch = ''
+    patchShebangs ./configure
+    patchShebangs ./extra
+  '';
+
+  # klee-uclibc configure does not support --prefix, so we override configurePhase entirely
+  configurePhase = ''
+    ./configure ${lib.escapeShellArgs (
+      ["--make-llvm-lib"]
+      ++ lib.optional (!debugRuntime) "--enable-release"
+      ++ lib.optional runtimeAsserts "--enable-assertions"
+    )}
+
+    # Set all the configs we care about.
+    configs=(
+      PREFIX=$out
+    )
+    for value in ${lib.escapeShellArgs resolvedExtraKleeuClibcConfig}; do
+      configs+=("$value")
+    done
+
+    for configFile in .config .config.cmd; do
+      for config in "''${configs[@]}"; do
+        prefix="''${config%%=*}="
+        if grep -q "$prefix" "$configFile"; then
+          sed -i "s"'\001'"''${prefix}"'\001'"#''${prefix}"'\001'"g" "$configFile"
+        fi
+        echo "$config" >> "$configFile"
+      done
+    done
+  '';
+
+  # Link the locale source into the correct place
+  preBuild = ''
+    ln -sf ${localeSrc} extra/locale/${localeSrcBase}
+  '';
+
+  makeFlags = ["HAVE_DOT_CONFIG=y"];
+
+  meta = with lib; {
+    description = "A modified version of uClibc for KLEE.";
+    longDescription = ''
+      klee-uclibc is a bitcode build of uClibc meant for compatibility with the
+      KLEE symbolic virtual machine.
+    '';
+    homepage = "https://klee.github.io/";
+    license = licenses.lgpl3;
+    maintainers = with maintainers; [ numinit ];
+  };
+}