llvmPackages: Organize files

Always do pkg/default.nix not pkg.nix; use directories to avoid
prefixing patches and other files.

pkgs/development/compilers/llvm/6/lldb/default.nix

@@ -0,0 +1,65 @@
+{ lib, stdenv
+, fetch
+, fetchpatch
+, cmake
+, zlib
+, ncurses
+, swig
+, which
+, libedit
+, libxml2
+, llvm
+, clang-unwrapped
+, python3
+, version
+, darwin
+}:
+
+stdenv.mkDerivation {
+  pname = "lldb";
+  inherit version;
+
+  src = fetch "lldb" "05178zkyh84x32n91md6wm22lkzzrrfwa5cpmgzn0yrg3y2771bb";
+
+  patches = [
+    # Fix PythonString::GetString for >=python-3.7
+    (fetchpatch {
+      url = "https://github.com/llvm/llvm-project/commit/5457b426f5e15a29c0acc8af1a476132f8be2a36.patch";
+      sha256 = "1zbx4m0m8kbg0wq6740jcw151vb2pb1p25p401wiq8diqqagkjps";
+      stripLen = 1;
+    })
+  ];
+
+  postPatch = ''
+    # Fix up various paths that assume llvm and clang are installed in the same place
+    sed -i 's,".*ClangConfig.cmake","${clang-unwrapped}/lib/cmake/clang/ClangConfig.cmake",' \
+      cmake/modules/LLDBStandalone.cmake
+    sed -i 's,".*tools/clang/include","${clang-unwrapped}/include",' \
+      cmake/modules/LLDBStandalone.cmake
+    sed -i 's,"$.LLVM_LIBRARY_DIR.",${llvm}/lib ${clang-unwrapped}/lib,' \
+      cmake/modules/LLDBStandalone.cmake
+  '';
+
+  nativeBuildInputs = [ cmake python3 which swig ];
+  buildInputs = [ ncurses zlib libedit libxml2 llvm ]
+    ++ lib.optionals stdenv.isDarwin [ darwin.libobjc darwin.apple_sdk.libs.xpc darwin.apple_sdk.frameworks.Foundation darwin.bootstrap_cmds darwin.apple_sdk.frameworks.Carbon darwin.apple_sdk.frameworks.Cocoa ];
+
+  CXXFLAGS = "-fno-rtti";
+  hardeningDisable = [ "format" ];
+
+  cmakeFlags = [
+    "-DLLDB_CODESIGN_IDENTITY=" # codesigning makes nondeterministic
+  ];
+
+  postInstall = ''
+    mkdir -p $out/share/man/man1
+    cp ../docs/lldb.1 $out/share/man/man1/
+  '';
+
+  meta = with lib; {
+    description = "A next-generation high-performance debugger";
+    homepage    = "https://llvm.org/";
+    license     = licenses.ncsa;
+    platforms   = platforms.all;
+  };
+}