diff --git a/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/BUILD b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/BUILD
new file mode 100755
index 0000000..d3b18c6
--- /dev/null
+++ b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/BUILD
@@ -0,0 +1,111 @@
+# Copyright 2016 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This becomes the BUILD file for @local_config_cc// under non-FreeBSD unixes.
+
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])  # Apache 2.0
+
+cc_library(
+    name = "malloc",
+)
+
+cc_library(
+    name = "stl",
+)
+
+filegroup(
+    name = "empty",
+    srcs = [],
+)
+
+filegroup(
+    name = "cc_wrapper",
+    srcs = ["cc_wrapper.sh"],
+)
+
+filegroup(
+    name = "compiler_deps",
+    srcs = glob(["extra_tools/**"]) + [":empty"],
+)
+
+# This is the entry point for --crosstool_top.  Toolchains are found
+# by lopping off the name of --crosstool_top and searching for
+# the "${CPU}" entry in the toolchains attribute.
+cc_toolchain_suite(
+    name = "toolchain",
+    toolchains = {
+        "k8|clang": ":cc-compiler-k8",
+        "k8": ":cc-compiler-k8",
+        "armeabi-v7a|compiler": ":cc-compiler-armeabi-v7a",
+        "armeabi-v7a": ":cc-compiler-armeabi-v7a",
+    },
+)
+
+cc_toolchain(
+    name = "cc-compiler-k8",
+    all_files = ":compiler_deps",
+    compiler_files = ":compiler_deps",
+    cpu = "k8",
+    dwp_files = ":empty",
+    dynamic_runtime_libs = [":empty"],
+    linker_files = ":compiler_deps",
+    objcopy_files = ":empty",
+    static_runtime_libs = [":empty"],
+    strip_files = ":empty",
+    supports_param_files = 1,
+)
+
+toolchain(
+    name = "cc-toolchain-k8",
+    exec_compatible_with = [
+        # This toolchain will only work with the local autoconfigured platforms.
+        "@bazel_tools//platforms:autoconfigured",
+        # TODO(katre): add autodiscovered constraints for host CPU and OS.
+    ],
+    target_compatible_with = [
+        # TODO(katre): add autodiscovered constraints for host CPU and OS.
+    ],
+    toolchain = ":cc-compiler-k8",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
+
+# Android tooling requires a default toolchain for the armeabi-v7a cpu.
+cc_toolchain(
+    name = "cc-compiler-armeabi-v7a",
+    all_files = ":empty",
+    compiler_files = ":empty",
+    cpu = "local",
+    dwp_files = ":empty",
+    dynamic_runtime_libs = [":empty"],
+    linker_files = ":empty",
+    objcopy_files = ":empty",
+    static_runtime_libs = [":empty"],
+    strip_files = ":empty",
+    supports_param_files = 1,
+)
+
+toolchain(
+    name = "cc-toolchain-armeabi-v7a",
+    exec_compatible_with = [
+        # TODO(katre): add autodiscovered constraints for host CPU and OS.
+    ],
+    target_compatible_with = [
+        "@bazel_tools//platforms:arm",
+        "@bazel_tools//platforms:android",
+    ],
+    toolchain = ":cc-compiler-armabi-v7a",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/CROSSTOOL b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/CROSSTOOL
new file mode 100755
index 0000000..d42a0e3
--- /dev/null
+++ b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/CROSSTOOL
@@ -0,0 +1,2143 @@
+# Copyright 2016 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+major_version: "local"
+minor_version: ""
+default_target_cpu: "same_as_host"
+
+default_toolchain {
+  cpu: "k8"
+  toolchain_identifier: "linux_gnu_x86"
+}
+
+default_toolchain {
+  cpu: "armeabi-v7a"
+  toolchain_identifier: "stub_armeabi-v7a"
+}
+
+default_toolchain {
+  cpu: "x64_windows"
+  toolchain_identifier: "msvc_x64"
+}
+
+default_toolchain {
+  cpu: "x64_windows_msvc"
+  toolchain_identifier: "msvc_x64"
+}
+
+default_toolchain {
+  cpu: "x64_windows_msys"
+  toolchain_identifier: "msys_x64"
+}
+
+default_toolchain {
+  cpu: "s390x"
+  toolchain_identifier: "linux_gnu_x86"
+}
+
+# Android tooling requires a default toolchain for the armeabi-v7a cpu.
+toolchain {
+  abi_version: "armeabi-v7a"
+  abi_libc_version: "armeabi-v7a"
+  builtin_sysroot: ""
+  compiler: "compiler"
+  host_system_name: "armeabi-v7a"
+  needsPic: true
+  supports_gold_linker: false
+  supports_incremental_linker: false
+  supports_fission: false
+  supports_interface_shared_objects: false
+  supports_normalizing_ar: false
+  supports_start_end_lib: false
+  target_libc: "armeabi-v7a"
+  target_cpu: "armeabi-v7a"
+  target_system_name: "armeabi-v7a"
+  toolchain_identifier: "stub_armeabi-v7a"
+
+  tool_path { name: "ar" path: "/bin/false" }
+  tool_path { name: "compat-ld" path: "/bin/false" }
+  tool_path { name: "cpp" path: "/bin/false" }
+  tool_path { name: "dwp" path: "/bin/false" }
+  tool_path { name: "gcc" path: "/bin/false" }
+  tool_path { name: "gcov" path: "/bin/false" }
+  tool_path { name: "ld" path: "/bin/false" }
+
+  tool_path { name: "nm" path: "/bin/false" }
+  tool_path { name: "objcopy" path: "/bin/false" }
+  tool_path { name: "objdump" path: "/bin/false" }
+  tool_path { name: "strip" path: "/bin/false" }
+  linking_mode_flags { mode: DYNAMIC }
+}
+
+toolchain {
+  toolchain_identifier: "linux_gnu_x86"
+  abi_version: "clang"
+  abi_libc_version: "glibc_2.19"
+  builtin_sysroot: ""
+  compiler: "clang"
+  host_system_name: "i686-unknown-linux-gnu"
+  needsPic: true
+  supports_gold_linker: true
+  supports_incremental_linker: false
+  supports_fission: false
+  supports_interface_shared_objects: false
+  supports_normalizing_ar: false
+  supports_start_end_lib: true
+  target_libc: "glibc_2.19"
+  target_cpu: "k8"
+  target_system_name: "x86_64-unknown-linux-gnu"
+  cxx_flag: "-std=c++0x"
+  linker_flag: "-fuse-ld=gold"
+  linker_flag: "-Wl,-no-as-needed"
+  linker_flag: "-Wl,-z,relro,-z,now"
+  linker_flag: "-B/usr/local/bin"
+  linker_flag: "-B/usr/bin"
+  linker_flag: "-lstdc++"
+  linker_flag: "-lm"
+  cxx_builtin_include_directory: "/usr/local/include"
+  cxx_builtin_include_directory: "/usr/local/lib/clang/8.0.0/include"
+  cxx_builtin_include_directory: "/usr/include/x86_64-linux-gnu"
+  cxx_builtin_include_directory: "/usr/include"
+  cxx_builtin_include_directory: "/usr/include/c++/5.4.0"
+  cxx_builtin_include_directory: "/usr/include/x86_64-linux-gnu/c++/5.4.0"
+  cxx_builtin_include_directory: "/usr/include/c++/5.4.0/backward"
+  objcopy_embed_flag: "-I"
+  objcopy_embed_flag: "binary"
+  unfiltered_cxx_flag: "-no-canonical-prefixes"
+  unfiltered_cxx_flag: "-Wno-builtin-macro-redefined"
+  unfiltered_cxx_flag: "-D__DATE__=\"redacted\""
+  unfiltered_cxx_flag: "-D__TIMESTAMP__=\"redacted\""
+  unfiltered_cxx_flag: "-D__TIME__=\"redacted\""
+  compiler_flag: "-U_FORTIFY_SOURCE"
+  compiler_flag: "-fstack-protector"
+  compiler_flag: "-Wall"
+  compiler_flag: "-B/usr/local/bin"
+  compiler_flag: "-B/usr/bin"
+  compiler_flag: "-fcolor-diagnostics"
+  compiler_flag: "-fno-omit-frame-pointer"
+  tool_path {name: "ar" path: "/usr/bin/ar" }
+  tool_path {name: "ld" path: "/usr/bin/ld" }
+  tool_path {name: "cpp" path: "/usr/bin/cpp" }
+  tool_path {name: "gcc" path: "/usr/local/bin/clang" }
+  tool_path {name: "dwp" path: "/usr/bin/dwp" }
+  tool_path {name: "gcov" path: "/usr/bin/gcov" }
+  tool_path {name: "nm" path: "/usr/bin/nm" }
+  tool_path {name: "objcopy" path: "/usr/bin/objcopy" }
+  tool_path {name: "objdump" path: "/usr/bin/objdump" }
+  tool_path {name: "strip" path: "/usr/bin/strip" }
+
+  compilation_mode_flags {
+    mode: DBG
+    compiler_flag: "-g"
+  }
+  compilation_mode_flags {
+    mode: OPT
+    compiler_flag: "-g0"
+    compiler_flag: "-O2"
+    compiler_flag: "-D_FORTIFY_SOURCE=1"
+    compiler_flag: "-DNDEBUG"
+    compiler_flag: "-ffunction-sections"
+    compiler_flag: "-fdata-sections"
+    linker_flag: "-Wl,--gc-sections"
+  }
+  linking_mode_flags { mode: DYNAMIC }
+  feature {
+    name: "no_legacy_features"
+  }
+  
+  feature {
+    name: "legacy_compile_flags"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "lto-backend"
+      action: "clif-match"
+      flag_group {
+        flag: "%{legacy_compile_flags}"
+        iterate_over: "legacy_compile_flags"
+      }
+      expand_if_all_available: "legacy_compile_flags"
+    }
+    enabled: true
+  }
+  feature {
+    name: "static_link_cpp_runtimes"
+  }
+  feature {
+    name: "dependency_file"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-compile"
+      action: "objc-compile"
+      action: "objc++-compile"
+      action: "c++-header-parsing"
+      action: "clif-match"
+      flag_group {
+        flag: "-MD"
+        flag: "-MF"
+        flag: "%{dependency_file}"
+      }
+      expand_if_all_available: "dependency_file"
+    }
+  }
+  feature {
+    name: "random_seed"
+    flag_set {
+      action: "c++-compile"
+      action: "c++-module-codegen"
+      action: "c++-module-compile"
+      flag_group {
+        flag: "-frandom-seed=%{output_file}"
+        expand_if_all_available: "output_file"
+      }
+    }
+  }
+  feature {
+    name: "pic"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-codegen"
+      action: "c++-module-compile"
+      flag_group {
+        flag: "-fPIC"
+      }
+      expand_if_all_available: "pic"
+    }
+  }
+  feature {
+    name: "per_object_debug_info"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-codegen"
+      flag_group {
+        flag: "-gsplit-dwarf"
+      }
+      expand_if_all_available: "per_object_debug_info_file"
+    }
+  }
+  feature {
+    name: "preprocessor_defines"
+    flag_set {
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "clif-match"
+      flag_group {
+        flag: "-D%{preprocessor_defines}"
+        iterate_over: "preprocessor_defines"
+      }
+    }
+  }
+  feature {
+    name: "includes"
+    flag_set {
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "clif-match"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "-include"
+        flag: "%{includes}"
+        iterate_over: "includes"
+        expand_if_all_available: "includes"
+      }
+    }
+    enabled: true
+  }
+  feature {
+    name: "include_paths"
+    flag_set {
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "clif-match"
+      action: "objc-compile"
+      action: "objc++-compile"
+      flag_group {
+        flag: "-iquote"
+        flag: "%{quote_include_paths}"
+        iterate_over: "quote_include_paths"
+      }
+      flag_group {
+        flag: "-I%{include_paths}"
+        iterate_over: "include_paths"
+      }
+      flag_group {
+        flag: "-isystem"
+        flag: "%{system_include_paths}"
+        iterate_over: "system_include_paths"
+      }
+    }
+  }
+  feature {
+    name: "fdo_instrument"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-executable"
+      flag_group {
+        flag: "-fprofile-generate=%{fdo_instrument_path}"
+        flag: "-fno-data-sections"
+        expand_if_all_available: "fdo_instrument_path"
+      }
+    }
+    provides: "profile"
+  }
+  feature {
+    name: "fdo_prefetch_hints"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      action: "lto-backend"
+      flag_group {
+        flag: "-Xclang-only=-mllvm"
+        flag: "-Xclang-only=-prefetch-hints-file=%{fdo_prefetch_hints_path}"
+      }
+      expand_if_all_available: "fdo_prefetch_hints_path"
+    }
+  }
+  feature {
+    name: "xbinaryfdo"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      flag_group {
+        flag: "-fauto-profile=%{fdo_profile_path}"
+        flag: "-fprofile-correction"
+      }
+      expand_if_all_available: "fdo_profile_path"
+    }
+    provides: "profile"
+  }
+  feature {
+    name: "autofdo"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      flag_group {
+        flag: "-fauto-profile=%{fdo_profile_path}"
+        flag: "-fprofile-correction"
+      }
+      expand_if_all_available: "fdo_profile_path"
+    }
+    provides: "profile"
+  }
+  feature {
+    name: "symbol_counts"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-Wl,--print-symbol-counts=%{symbol_counts_output}"
+      }
+      expand_if_all_available: "symbol_counts_output"
+    }
+  }
+  feature {
+    name: "shared_flag"
+    flag_set {
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-shared"
+      }
+    }
+  }
+  feature {
+    name: "linkstamps"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "%{linkstamp_paths}"
+        iterate_over: "linkstamp_paths"
+      }
+      expand_if_all_available: "linkstamp_paths"
+    }
+  }
+  feature {
+    name: "output_execpath_flags"
+    flag_set {
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-executable"
+      flag_group {
+        flag: "-o"
+        flag: "%{output_execpath}"
+      }
+      expand_if_all_available: "output_execpath"
+    }
+  }
+  feature {
+    name: "runtime_library_search_directories"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag_group {
+          flag: "-Wl,-rpath,$ORIGIN/%{runtime_library_search_directories}"
+        }
+        iterate_over: "runtime_library_search_directories"
+      }
+      expand_if_all_available: "runtime_library_search_directories"
+    }
+  }
+  feature {
+    name: "library_search_directories"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-L%{library_search_directories}"
+        iterate_over: "library_search_directories"
+      }
+      expand_if_all_available: "library_search_directories"
+    }
+  }
+  feature {
+    name: "archiver_flags"
+    flag_set {
+      action: "c++-link-static-library"
+      flag_group {
+        flag: "rcsD"
+      }
+      flag_group {
+        flag: "%{output_execpath}"
+        expand_if_all_available: "output_execpath"
+      }
+    }
+    flag_set {
+      action: "c++-link-static-library"
+      flag_group {
+        flag_group {
+          flag: "%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file"
+          }
+        }
+        flag_group {
+          flag: "%{libraries_to_link.object_files}"
+          iterate_over: "libraries_to_link.object_files"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file_group"
+          }
+        }
+        iterate_over: "libraries_to_link"
+      }
+      expand_if_all_available: "libraries_to_link"
+    }
+  }
+  feature {
+    name: "libraries_to_link"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag_group {
+          flag: "-Wl,--start-lib"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file_group"
+          }
+        }
+        flag_group {
+          flag: "-Wl,-whole-archive"
+          expand_if_true: "libraries_to_link.is_whole_archive"
+        }
+        flag_group {
+          flag: "%{libraries_to_link.object_files}"
+          iterate_over: "libraries_to_link.object_files"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file_group"
+          }
+        }
+        flag_group {
+          flag: "%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file"
+          }
+        }
+        flag_group {
+          flag: "%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "interface_library"
+          }
+        }
+        flag_group {
+          flag: "%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "static_library"
+          }
+        }
+        flag_group {
+          flag: "-l%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "dynamic_library"
+          }
+        }
+        flag_group {
+          flag: "-l:%{libraries_to_link.name}"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "versioned_dynamic_library"
+          }
+        }
+        flag_group {
+          flag: "-Wl,-no-whole-archive"
+          expand_if_true: "libraries_to_link.is_whole_archive"
+        }
+        flag_group {
+          flag: "-Wl,--end-lib"
+          expand_if_equal {
+            variable: "libraries_to_link.type"
+            value: "object_file_group"
+          }
+        }
+        iterate_over: "libraries_to_link"
+      }
+      flag_group {
+        flag: "-Wl,@%{thinlto_param_file}"
+        expand_if_true: "thinlto_param_file"
+      }
+      expand_if_all_available: "libraries_to_link"
+    }
+  }
+  feature {
+    name: "force_pic_flags"
+    flag_set {
+      action: "c++-link-executable"
+      flag_group {
+        flag: "-pie"
+      }
+      expand_if_all_available: "force_pic"
+    }
+  }
+  feature {
+    name: "user_link_flags"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "%{user_link_flags}"
+        iterate_over: "user_link_flags"
+      }
+      expand_if_all_available: "user_link_flags"
+    }
+  }
+  feature {
+    name: "legacy_link_flags"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "%{legacy_link_flags}"
+        iterate_over: "legacy_link_flags"
+      }
+      expand_if_all_available: "legacy_link_flags"
+    }
+  }
+  feature {
+    name: "fission_support"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-Wl,--gdb-index"
+        expand_if_all_available: "is_using_fission"
+      }
+    }
+  }
+  feature {
+    name: "strip_debug_symbols"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-Wl,-S"
+        expand_if_all_available: "strip_debug_symbols"
+      }
+    }
+  }
+  feature {
+    name: "coverage"
+    flag_set {
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      flag_group {
+        flag: "--coverage"
+      }
+    }
+    flag_set {
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-executable"
+      flag_group {
+        flag: "--coverage"
+      }
+    }
+    provides: "profile"
+  }
+  feature {
+    name: "fdo_optimize"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      flag_group {
+        flag: "-fprofile-use=%{fdo_profile_path}"
+        flag: "-fprofile-correction"
+      }
+      expand_if_all_available: "fdo_profile_path"
+    }
+    provides: "profile"
+  }
+  feature {
+    name: "fully_static_link"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      flag_group {
+        flag: "-static"
+      }
+    }
+  }
+  feature {
+    name: "user_compile_flags"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "lto-backend"
+      action: "clif-match"
+      flag_group {
+        flag: "%{user_compile_flags}"
+        iterate_over: "user_compile_flags"
+      }
+      expand_if_all_available: "user_compile_flags"
+    }
+    enabled: true
+  }
+  feature {
+    name: "sysroot"
+    flag_set {
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "clif-match"
+      action: "lto-backend"
+      flag_group {
+        flag: "--sysroot=%{sysroot}"
+        expand_if_all_available: "sysroot"
+      }
+    }
+    enabled: true
+  }
+  feature {
+    name: "unfiltered_compile_flags"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "linkstamp-compile"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "lto-backend"
+      action: "clif-match"
+      flag_group {
+        flag: "%{unfiltered_compile_flags}"
+        iterate_over: "unfiltered_compile_flags"
+      }
+      expand_if_all_available: "unfiltered_compile_flags"
+    }
+    enabled: true
+  }
+  feature {
+    name: "linker_param_file"
+    flag_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "-Wl,@%{linker_param_file}"
+      }
+      expand_if_all_available: "linker_param_file"
+    }
+    flag_set {
+      action: "c++-link-static-library"
+      flag_group {
+        flag: "@%{linker_param_file}"
+      }
+      expand_if_all_available: "linker_param_file"
+    }
+  }
+  feature {
+    name: "compiler_input_flags"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "linkstamp-compile"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "objc-compile"
+      action: "objc++-compile"
+      action: "c++-header-parsing"
+      action: "lto-backend"
+      flag_group {
+        flag: "-c"
+        flag: "%{source_file}"
+      }
+      expand_if_all_available: "source_file"
+    }
+    enabled: true
+  }
+  feature {
+    name: "compiler_output_flags"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "linkstamp-compile"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "objc-compile"
+      action: "objc++-compile"
+      action: "c++-header-parsing"
+      action: "lto-backend"
+      flag_group {
+        flag: "-S"
+        expand_if_all_available: "output_assembly_file"
+      }
+      flag_group {
+        flag: "-E"
+        expand_if_all_available: "output_preprocess_file"
+      }
+      flag_group {
+        flag: "-o"
+        flag: "%{output_file}"
+        expand_if_all_available: "output_file"
+      }
+    }
+    enabled: true
+  }
+  action_config {
+    config_name: "assemble"
+    action_name: "assemble"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "preprocess-assemble"
+    action_name: "preprocess-assemble"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "linkstamp-compile"
+    action_name: "linkstamp-compile"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c-compile"
+    action_name: "c-compile"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c++-compile"
+    action_name: "c++-compile"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c++-header-parsing"
+    action_name: "c++-header-parsing"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c++-module-compile"
+    action_name: "c++-module-compile"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c++-module-codegen"
+    action_name: "c++-module-codegen"
+    tool {
+      tool_path: "/usr/local/bin/clang"
+    }
+    implies: "legacy_compile_flags"
+    implies: "user_compile_flags"
+    implies: "sysroot"
+    implies: "unfiltered_compile_flags"
+    implies: "compiler_input_flags"
+    implies: "compiler_output_flags"
+  }
+  action_config {
+    config_name: "c++-link-executable"
+    action_name: "c++-link-executable"
+    tool {
+      tool_path: "/usr/local/bin/clang++"
+    }
+    implies: "symbol_counts"
+    implies: "strip_debug_symbols"
+    implies: "linkstamps"
+    implies: "output_execpath_flags"
+    implies: "runtime_library_search_directories"
+    implies: "library_search_directories"
+    implies: "libraries_to_link"
+    implies: "force_pic_flags"
+    implies: "user_link_flags"
+    implies: "legacy_link_flags"
+    implies: "linker_param_file"
+    implies: "fission_support"
+    implies: "sysroot"
+  }
+  action_config {
+    config_name: "c++-link-nodeps-dynamic-library"
+    action_name: "c++-link-nodeps-dynamic-library"
+    tool {
+      tool_path: "/usr/local/bin/clang++"
+    }
+    implies: "symbol_counts"
+    implies: "strip_debug_symbols"
+    implies: "shared_flag"
+    implies: "linkstamps"
+    implies: "output_execpath_flags"
+    implies: "runtime_library_search_directories"
+    implies: "library_search_directories"
+    implies: "libraries_to_link"
+    implies: "user_link_flags"
+    implies: "legacy_link_flags"
+    implies: "linker_param_file"
+    implies: "fission_support"
+    implies: "sysroot"
+  }
+  action_config {
+    config_name: "c++-link-dynamic-library"
+    action_name: "c++-link-dynamic-library"
+    tool {
+      tool_path: "/usr/local/bin/clang++"
+    }
+    implies: "symbol_counts"
+    implies: "strip_debug_symbols"
+    implies: "shared_flag"
+    implies: "linkstamps"
+    implies: "output_execpath_flags"
+    implies: "runtime_library_search_directories"
+    implies: "library_search_directories"
+    implies: "libraries_to_link"
+    implies: "user_link_flags"
+    implies: "legacy_link_flags"
+    implies: "linker_param_file"
+    implies: "fission_support"
+    implies: "sysroot"
+  }
+  action_config {
+    config_name: "c++-link-static-library"
+    action_name: "c++-link-static-library"
+    tool {
+      tool_path: "/usr/bin/ar"
+    }
+    implies: "archiver_flags"
+    implies: "linker_param_file"
+  }
+  action_config {
+    config_name: "strip"
+    action_name: "strip"
+    tool {
+      tool_path: "/usr/bin/strip"
+    }
+    flag_set {
+      flag_group {
+        flag: "-S"
+        flag: "-p"
+        flag: "-o"
+        flag: "%{output_file}"
+      }
+      flag_group {
+        flag: "-R"
+        flag: ".gnu.switches.text.quote_paths"
+        flag: "-R"
+        flag: ".gnu.switches.text.bracket_paths"
+        flag: "-R"
+        flag: ".gnu.switches.text.system_paths"
+        flag: "-R"
+        flag: ".gnu.switches.text.cpp_defines"
+        flag: "-R"
+        flag: ".gnu.switches.text.cpp_includes"
+        flag: "-R"
+        flag: ".gnu.switches.text.cl_args"
+        flag: "-R"
+        flag: ".gnu.switches.text.lipo_info"
+        flag: "-R"
+        flag: ".gnu.switches.text.annotation"
+      }
+      flag_group {
+        flag: "%{stripopts}"
+        iterate_over: "stripopts"
+      }
+      flag_group {
+        flag: "%{input_file}"
+      }
+    }
+  }
+  artifact_name_pattern {
+    category_name: "static_library"
+    prefix: "lib"
+    extension: ".a"
+  }
+  artifact_name_pattern {
+    category_name: "alwayslink_static_library"
+    prefix: "lib"
+    extension: ".lo"
+  }
+  artifact_name_pattern {
+    category_name: "dynamic_library"
+    prefix: "lib"
+    extension: ".so"
+  }
+  artifact_name_pattern {
+    category_name: "executable"
+    prefix: ""
+    extension: ""
+  }
+  artifact_name_pattern {
+    category_name: "interface_library"
+    prefix: "lib"
+    extension: ".ifso"
+  }
+  artifact_name_pattern {
+    category_name: "pic_file"
+    prefix: ""
+    extension: ".pic"
+  }
+  artifact_name_pattern {
+    category_name: "included_file_list"
+    prefix: ""
+    extension: ".d"
+  }
+  artifact_name_pattern {
+    category_name: "object_file"
+    prefix: ""
+    extension: ".o"
+  }
+  artifact_name_pattern {
+    category_name: "pic_object_file"
+    prefix: ""
+    extension: ".pic.o"
+  }
+  artifact_name_pattern {
+    category_name: "cpp_module"
+    prefix: ""
+    extension: ".pcm"
+  }
+  artifact_name_pattern {
+    category_name: "generated_assembly"
+    prefix: ""
+    extension: ".s"
+  }
+  artifact_name_pattern {
+    category_name: "processed_header"
+    prefix: ""
+    extension: ".processed"
+  }
+  artifact_name_pattern {
+    category_name: "generated_header"
+    prefix: ""
+    extension: ".h"
+  }
+  artifact_name_pattern {
+    category_name: "preprocessed_c_source"
+    prefix: ""
+    extension: ".i"
+  }
+  artifact_name_pattern {
+    category_name: "preprocessed_cpp_source"
+    prefix: ""
+    extension: ".ii"
+  }
+  artifact_name_pattern {
+    category_name: "coverage_data_file"
+    prefix: ""
+    extension: ".gcno"
+  }
+  artifact_name_pattern {
+    category_name: "clif_output_proto"
+    prefix: ""
+    extension: ".opb"
+  }
+
+   
+}
+
+toolchain {
+  toolchain_identifier: "msys_x64_mingw"
+  abi_version: "local"
+  abi_libc_version: "local"
+  builtin_sysroot: ""
+  compiler: "mingw-gcc"
+  host_system_name: "local"
+  needsPic: false
+  target_libc: "mingw"
+  target_cpu: "x64_windows"
+  target_system_name: "local"
+
+  artifact_name_pattern {
+     category_name: 'executable'
+     prefix: ''
+     extension: '.exe'
+  }
+
+
+
+  linking_mode_flags { mode: DYNAMIC }
+}
+
+toolchain {
+  toolchain_identifier: "msvc_x64"
+  host_system_name: "local"
+  target_system_name: "local"
+
+  abi_version: "local"
+  abi_libc_version: "local"
+  target_cpu: "x64_windows"
+  compiler: "msvc-cl"
+  target_libc: "msvcrt"
+  default_python_version: "python2.7"
+
+
+
+  tool_path {
+    name: "ar"
+    path: ""
+  }
+  tool_path {
+    name: "ml"
+    path: ""
+  }
+  tool_path {
+    name: "cpp"
+    path: ""
+  }
+  tool_path {
+    name: "gcc"
+    path: ""
+  }
+  tool_path {
+    name: "gcov"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  tool_path {
+    name: "ld"
+    path: ""
+  }
+  tool_path {
+    name: "nm"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  tool_path {
+    name: "objcopy"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  tool_path {
+    name: "objdump"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  tool_path {
+    name: "strip"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  supports_gold_linker: false
+  supports_start_end_lib: false
+  supports_interface_shared_objects: true
+  supports_incremental_linker: false
+  supports_normalizing_ar: true
+  needsPic: false
+
+  # TODO(pcloudy): Review those flags below, they should be defined by cl.exe
+  compiler_flag: "/DCOMPILER_MSVC"
+
+  # Don't define min/max macros in windows.h.
+  compiler_flag: "/DNOMINMAX"
+
+  # Platform defines.
+  compiler_flag: "/D_WIN32_WINNT=0x0600"
+  # Turn off warning messages.
+  compiler_flag: "/D_CRT_SECURE_NO_DEPRECATE"
+  compiler_flag: "/D_CRT_SECURE_NO_WARNINGS"
+
+  # Useful options to have on for compilation.
+  # Increase the capacity of object files to 2^32 sections.
+  compiler_flag: "/bigobj"
+  # Allocate 500MB for precomputed headers.
+  compiler_flag: "/Zm500"
+  # Catch C++ exceptions only and tell the compiler to assume that functions declared
+  # as extern "C" never throw a C++ exception.
+  compiler_flag: "/EHsc"
+
+  # Globally disabled warnings.
+  # Don't warn about elements of array being be default initialized.
+  compiler_flag: "/wd4351"
+  # Don't warn about no matching delete found.
+  compiler_flag: "/wd4291"
+  # Don't warn about diamond inheritance patterns.
+  compiler_flag: "/wd4250"
+  # Don't warn about insecure functions (e.g. non _s functions).
+  compiler_flag: "/wd4996"
+
+  linker_flag: "/MACHINE:X64"
+
+  feature {
+    name: "no_legacy_features"
+  }
+
+  artifact_name_pattern {
+     category_name: 'object_file'
+     prefix: ''
+     extension: '.obj'
+  }
+
+  artifact_name_pattern {
+     category_name: 'static_library'
+     prefix: ''
+     extension: '.lib'
+  }
+
+  artifact_name_pattern {
+     category_name: 'alwayslink_static_library'
+     prefix: ''
+     extension: '.lo.lib'
+  }
+
+  artifact_name_pattern {
+     category_name: 'executable'
+     prefix: ''
+     extension: '.exe'
+  }
+
+  artifact_name_pattern {
+     category_name: 'dynamic_library'
+     prefix: ''
+     extension: '.dll'
+  }
+
+  artifact_name_pattern {
+     category_name: 'interface_library'
+     prefix: ''
+     extension: '.if.lib'
+  }
+
+  # Suppress startup banner.
+  feature {
+    name: "nologo"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "c++-header-parsing"
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-static-library"
+      flag_group {
+        flag: "/nologo"
+      }
+    }
+  }
+
+  feature {
+    name: 'has_configured_linker_path'
+  }
+
+  # This feature indicates strip is not supported, building stripped binary will just result a copy of orignial binary
+  feature {
+    name: 'no_stripping'
+  }
+
+  # This feature indicates this is a toolchain targeting Windows.
+  feature {
+    name: 'targets_windows'
+    implies: 'copy_dynamic_libraries_to_binary'
+    enabled: true
+  }
+
+  feature {
+    name: 'copy_dynamic_libraries_to_binary'
+  }
+
+  action_config {
+    config_name: 'assemble'
+    action_name: 'assemble'
+    tool {
+      tool_path: ''
+    }
+    implies: 'compiler_input_flags'
+    implies: 'compiler_output_flags'
+    implies: 'nologo'
+    implies: 'msvc_env'
+    implies: 'sysroot'
+  }
+
+  action_config {
+    config_name: 'preprocess-assemble'
+    action_name: 'preprocess-assemble'
+    tool {
+      tool_path: ''
+    }
+    implies: 'compiler_input_flags'
+    implies: 'compiler_output_flags'
+    implies: 'nologo'
+    implies: 'msvc_env'
+    implies: 'sysroot'
+  }
+
+  action_config {
+    config_name: 'c-compile'
+    action_name: 'c-compile'
+    tool {
+      tool_path: ''
+    }
+    implies: 'compiler_input_flags'
+    implies: 'compiler_output_flags'
+    implies: 'legacy_compile_flags'
+    implies: 'nologo'
+    implies: 'msvc_env'
+    implies: 'parse_showincludes'
+    implies: 'user_compile_flags'
+    implies: 'sysroot'
+    implies: 'unfiltered_compile_flags'
+  }
+
+  action_config {
+    config_name: 'c++-compile'
+    action_name: 'c++-compile'
+    tool {
+      tool_path: ''
+    }
+    implies: 'compiler_input_flags'
+    implies: 'compiler_output_flags'
+    implies: 'legacy_compile_flags'
+    implies: 'nologo'
+    implies: 'msvc_env'
+    implies: 'parse_showincludes'
+    implies: 'user_compile_flags'
+    implies: 'sysroot'
+    implies: 'unfiltered_compile_flags'
+  }
+
+  action_config {
+    config_name: 'c++-link-executable'
+    action_name: 'c++-link-executable'
+    tool {
+      tool_path: ''
+    }
+    implies: 'nologo'
+    implies: 'linkstamps'
+    implies: 'output_execpath_flags'
+    implies: 'input_param_flags'
+    implies: 'user_link_flags'
+    implies: 'legacy_link_flags'
+    implies: 'linker_subsystem_flag'
+    implies: 'linker_param_file'
+    implies: 'msvc_env'
+    implies: 'no_stripping'
+  }
+
+  action_config {
+    config_name: 'c++-link-dynamic-library'
+    action_name: 'c++-link-dynamic-library'
+    tool {
+      tool_path: ''
+    }
+    implies: 'nologo'
+    implies: 'shared_flag'
+    implies: 'linkstamps'
+    implies: 'output_execpath_flags'
+    implies: 'input_param_flags'
+    implies: 'user_link_flags'
+    implies: 'legacy_link_flags'
+    implies: 'linker_subsystem_flag'
+    implies: 'linker_param_file'
+    implies: 'msvc_env'
+    implies: 'no_stripping'
+    implies: 'has_configured_linker_path'
+    implies: 'def_file'
+  }
+
+  action_config {
+      config_name: 'c++-link-nodeps-dynamic-library'
+      action_name: 'c++-link-nodeps-dynamic-library'
+      tool {
+        tool_path: ''
+      }
+      implies: 'nologo'
+      implies: 'shared_flag'
+      implies: 'linkstamps'
+      implies: 'output_execpath_flags'
+      implies: 'input_param_flags'
+      implies: 'user_link_flags'
+      implies: 'legacy_link_flags'
+      implies: 'linker_subsystem_flag'
+      implies: 'linker_param_file'
+      implies: 'msvc_env'
+      implies: 'no_stripping'
+      implies: 'has_configured_linker_path'
+      implies: 'def_file'
+    }
+
+  action_config {
+    config_name: 'c++-link-static-library'
+    action_name: 'c++-link-static-library'
+    tool {
+      tool_path: ''
+    }
+    implies: 'nologo'
+    implies: 'archiver_flags'
+    implies: 'input_param_flags'
+    implies: 'linker_param_file'
+    implies: 'msvc_env'
+  }
+
+  # TODO(b/65151735): Remove legacy_compile_flags feature when legacy fields are
+  # not used in this crosstool
+  feature {
+    name: 'legacy_compile_flags'
+    flag_set {
+      expand_if_all_available: 'legacy_compile_flags'
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      flag_group {
+        iterate_over: 'legacy_compile_flags'
+        flag: '%{legacy_compile_flags}'
+      }
+    }
+  }
+
+  feature {
+    name: "msvc_env"
+    env_set {
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "c++-header-parsing"
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-static-library"
+      env_entry {
+        key: "PATH"
+        value: ""
+      }
+      env_entry {
+        key: "TMP"
+        value: ""
+      }
+      env_entry {
+        key: "TEMP"
+        value: ""
+      }
+    }
+    implies: 'msvc_compile_env'
+    implies: 'msvc_link_env'
+  }
+
+  feature {
+    name: "msvc_compile_env"
+    env_set {
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-module-compile"
+      action: "c++-module-codegen"
+      action: "c++-header-parsing"
+      action: "assemble"
+      action: "preprocess-assemble"
+      env_entry {
+        key: "INCLUDE"
+        value: ""
+      }
+    }
+  }
+
+  feature {
+    name: "msvc_link_env"
+    env_set {
+      action: "c++-link-executable"
+      action: "c++-link-dynamic-library"
+      action: "c++-link-nodeps-dynamic-library"
+      action: "c++-link-static-library"
+      env_entry {
+        key: "LIB"
+        value: ""
+      }
+    }
+  }
+
+  feature {
+    name: 'include_paths'
+    flag_set {
+      action: "assemble"
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      flag_group {
+        iterate_over: 'quote_include_paths'
+        flag: '/I%{quote_include_paths}'
+      }
+      flag_group {
+        iterate_over: 'include_paths'
+        flag: '/I%{include_paths}'
+      }
+      flag_group {
+        iterate_over: 'system_include_paths'
+        flag: '/I%{system_include_paths}'
+      }
+    }
+  }
+
+  feature {
+    name: "preprocessor_defines"
+    flag_set {
+      action: "assemble"
+      action: "preprocess-assemble"
+      action: "c-compile"
+      action: "c++-compile"
+      action: "c++-header-parsing"
+      action: "c++-module-compile"
+      flag_group {
+        flag: "/D%{preprocessor_defines}"
+        iterate_over: "preprocessor_defines"
+      }
+    }
+  }
+
+  # Tell Bazel to parse the output of /showIncludes
+  feature {
+    name: 'parse_showincludes'
+    flag_set {
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-module-compile'
+      action: 'c++-header-parsing'
+      flag_group {
+        flag: "/showIncludes"
+      }
+    }
+  }
+
+
+  feature {
+    name: 'generate_pdb_file'
+    requires: {
+      feature: 'dbg'
+    }
+    requires: {
+      feature: 'fastbuild'
+    }
+  }
+
+  feature {
+    name: 'shared_flag'
+    flag_set {
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: '/DLL'
+      }
+    }
+  }
+
+  feature {
+    name: 'linkstamps'
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      expand_if_all_available: 'linkstamp_paths'
+      flag_group {
+        iterate_over: 'linkstamp_paths'
+        flag: '%{linkstamp_paths}'
+      }
+    }
+  }
+
+  feature {
+    name: 'output_execpath_flags'
+    flag_set {
+      expand_if_all_available: 'output_execpath'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: '/OUT:%{output_execpath}'
+      }
+    }
+  }
+
+  feature {
+    name: 'archiver_flags'
+    flag_set {
+      expand_if_all_available: 'output_execpath'
+      action: 'c++-link-static-library'
+      flag_group {
+        flag: '/OUT:%{output_execpath}'
+      }
+    }
+  }
+
+  feature {
+    name: 'input_param_flags'
+    flag_set {
+      expand_if_all_available: 'interface_library_output_path'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/IMPLIB:%{interface_library_output_path}"
+      }
+    }
+    flag_set {
+      expand_if_all_available: 'libopts'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        iterate_over: 'libopts'
+        flag: '%{libopts}'
+      }
+    }
+    flag_set {
+      expand_if_all_available: 'libraries_to_link'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      action: 'c++-link-static-library'
+      flag_group {
+        iterate_over: 'libraries_to_link'
+        flag_group {
+          expand_if_equal: {
+            variable: 'libraries_to_link.type'
+            value: 'object_file_group'
+          }
+          iterate_over: 'libraries_to_link.object_files'
+          flag_group {
+            flag: '%{libraries_to_link.object_files}'
+          }
+        }
+        flag_group {
+          expand_if_equal: {
+            variable: 'libraries_to_link.type'
+            value: 'object_file'
+          }
+          flag_group {
+            flag: '%{libraries_to_link.name}'
+          }
+        }
+        flag_group {
+          expand_if_equal: {
+            variable: 'libraries_to_link.type'
+            value: 'interface_library'
+          }
+          flag_group {
+            flag: '%{libraries_to_link.name}'
+          }
+        }
+        flag_group {
+          expand_if_equal: {
+            variable: 'libraries_to_link.type'
+            value: 'static_library'
+          }
+          flag_group {
+            expand_if_false: 'libraries_to_link.is_whole_archive'
+            flag: '%{libraries_to_link.name}'
+          }
+          flag_group {
+            expand_if_true: 'libraries_to_link.is_whole_archive'
+            flag: '/WHOLEARCHIVE:%{libraries_to_link.name}'
+          }
+        }
+      }
+    }
+  }
+
+  # Since this feature is declared earlier in the CROSSTOOL than
+  # "user_link_flags", this feature will be applied prior to it anwyhere they
+  # are both implied. And since "user_link_flags" contains the linkopts from
+  # the build rule, this allows the user to override the /SUBSYSTEM in the BUILD
+  # file.
+  feature {
+    name: 'linker_subsystem_flag'
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: '/SUBSYSTEM:CONSOLE'
+      }
+    }
+  }
+
+  # The "user_link_flags" contains user-defined linkopts (from build rules)
+  # so it should be defined after features that declare user-overridable flags.
+  # For example the "linker_subsystem_flag" defines a default "/SUBSYSTEM" flag
+  # but we want to let the user override it, therefore "link_flag_subsystem" is
+  # defined earlier in the CROSSTOOL file than "user_link_flags".
+  feature {
+    name: 'user_link_flags'
+    flag_set {
+      expand_if_all_available: 'user_link_flags'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        iterate_over: 'user_link_flags'
+        flag: '%{user_link_flags}'
+      }
+    }
+  }
+  feature {
+    name: 'legacy_link_flags'
+    flag_set {
+      expand_if_all_available: 'legacy_link_flags'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        iterate_over: 'legacy_link_flags'
+        flag: '%{legacy_link_flags}'
+      }
+    }
+  }
+
+  feature {
+    name: 'linker_param_file'
+    flag_set {
+      expand_if_all_available: 'linker_param_file'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      action: 'c++-link-static-library'
+      flag_group {
+        flag: '@%{linker_param_file}'
+      }
+    }
+  }
+
+  feature {
+    name: 'static_link_msvcrt'
+  }
+
+  feature {
+    name: 'static_link_msvcrt_no_debug'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/MT"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/DEFAULTLIB:libcmt.lib"
+      }
+    }
+    requires: { feature: 'fastbuild'}
+    requires: { feature: 'opt'}
+  }
+
+  feature {
+    name: 'dynamic_link_msvcrt_no_debug'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/MD"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/DEFAULTLIB:msvcrt.lib"
+      }
+    }
+    requires: { feature: 'fastbuild'}
+    requires: { feature: 'opt'}
+  }
+
+  feature {
+    name: 'static_link_msvcrt_debug'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/MTd"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/DEFAULTLIB:libcmtd.lib"
+      }
+    }
+    requires: { feature: 'dbg'}
+  }
+
+  feature {
+    name: 'dynamic_link_msvcrt_debug'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/MDd"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/DEFAULTLIB:msvcrtd.lib"
+      }
+    }
+    requires: { feature: 'dbg'}
+  }
+
+  feature {
+    name: 'dbg'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/Od"
+        flag: "/Z7"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: ""
+        flag: "/INCREMENTAL:NO"
+      }
+    }
+    implies: 'generate_pdb_file'
+  }
+
+  feature {
+    name: 'fastbuild'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/Od"
+        flag: "/Z7"
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: ""
+        flag: "/INCREMENTAL:NO"
+      }
+    }
+    implies: 'generate_pdb_file'
+  }
+
+  feature {
+    name: 'opt'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/O2" # Implies /Og /Oi /Ot /Oy /Ob2 /Gs /GF /Gy
+      }
+    }
+    implies: 'frame_pointer'
+  }
+
+  # Keep stack frames for debugging, even in opt mode.
+  # Must come after /O1, /O2 and /Ox.
+  feature {
+    name: "frame_pointer"
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      flag_group {
+        flag: "/Oy-"
+      }
+    }
+  }
+
+  # Remove assert/DCHECKs in opt mode.
+  # You can have them back with --features=-disable_assertions.
+  feature {
+    name: 'disable_assertions'
+    enabled: true
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      with_feature: {
+        feature: 'opt'
+      }
+      flag_group {
+        flag: "/DNDEBUG"
+      }
+    }
+  }
+
+  feature {
+    name: "determinism"
+    enabled: true
+    flag_set {
+      action: "c-compile"
+      action: "c++-compile"
+      flag_group {
+        # Make C++ compilation deterministic. Use linkstamping instead of these
+        # compiler symbols.
+        # TODO: detect clang on Windows and use "-Wno-builtin-macro-redefined"
+        flag: "/wd4117" # Trying to define or undefine a predefined macro
+        flag: "-D__DATE__=\"redacted\""
+        flag: "-D__TIMESTAMP__=\"redacted\""
+        flag: "-D__TIME__=\"redacted\""
+      }
+    }
+  }
+
+  feature {
+    name: 'treat_warnings_as_errors'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      flag_group {
+        flag: "/WX"
+      }
+    }
+  }
+
+  # Trade slower build time for smaller binary
+  feature {
+    name: 'smaller_binary'
+    enabled: true
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      with_feature: {
+        feature: 'opt'
+      }
+      flag_group {
+        flag: "/Gy" # Enable function-level linking (-ffunction-sections)
+        flag: "/Gw" # Optimize global data (-fdata-sections)
+      }
+    }
+    flag_set {
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library',
+      action: 'c++-link-nodeps-dynamic-library'
+      with_feature: {
+        feature: 'opt'
+      }
+      flag_group {
+        flag: '/OPT:ICF' # Fold identical functions
+        flag: '/OPT:REF' # Eliminate unreferenced functions and data
+      }
+    }
+  }
+
+  # Suppress warnings that most users do not care
+  feature {
+    name: 'ignore_noisy_warnings'
+    enabled: true
+    flag_set {
+      action: 'c++-link-static-library'
+      flag_group {
+        # Suppress 'object file does not define any public symbols' warning
+        flag: '/ignore:4221'
+      }
+    }
+  }
+
+  feature {
+    name: 'user_compile_flags'
+    flag_set {
+      expand_if_all_available: 'user_compile_flags'
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      flag_group {
+        iterate_over: 'user_compile_flags'
+        flag: '%{user_compile_flags}'
+      }
+    }
+  }
+
+  feature {
+    name: 'sysroot'
+    flag_set {
+      expand_if_all_available: 'sysroot'
+      action: 'assemble'
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        iterate_over: 'sysroot'
+        flag: '--sysroot=%{sysroot}'
+      }
+    }
+  }
+
+  feature {
+    name: 'unfiltered_compile_flags'
+    flag_set {
+      expand_if_all_available: 'unfiltered_compile_flags'
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      flag_group {
+        iterate_over: 'unfiltered_compile_flags'
+        flag: '%{unfiltered_compile_flags}'
+      }
+    }
+  }
+
+  feature {
+    name: 'compiler_output_flags'
+    flag_set {
+      action: 'assemble'
+      flag_group {
+        expand_if_all_available: 'output_file'
+        expand_if_none_available: 'output_assembly_file'
+        expand_if_none_available: 'output_preprocess_file'
+        flag: '/Fo%{output_file}'
+        flag: '/Zi'
+      }
+    }
+    flag_set {
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      flag_group {
+        expand_if_all_available: 'output_file'
+        expand_if_none_available: 'output_assembly_file'
+        expand_if_none_available: 'output_preprocess_file'
+        flag: '/Fo%{output_file}'
+      }
+      flag_group {
+        expand_if_all_available: 'output_file'
+        expand_if_all_available: 'output_assembly_file'
+        flag: '/Fa%{output_file}'
+      }
+      flag_group {
+        expand_if_all_available: 'output_file'
+        expand_if_all_available: 'output_preprocess_file'
+        flag: '/P'
+        flag: '/Fi%{output_file}'
+      }
+    }
+  }
+
+  feature {
+    name: 'compiler_input_flags'
+    flag_set {
+      action: 'assemble'
+      action: 'preprocess-assemble'
+      action: 'c-compile'
+      action: 'c++-compile'
+      action: 'c++-header-parsing'
+      action: 'c++-module-compile'
+      action: 'c++-module-codegen'
+      flag_group {
+        expand_if_all_available: 'source_file'
+        flag: '/c'
+        flag: '%{source_file}'
+      }
+    }
+  }
+
+  feature {
+    name : 'def_file',
+    flag_set {
+      expand_if_all_available: 'def_file_path'
+      action: 'c++-link-executable'
+      action: 'c++-link-dynamic-library'
+      action: "c++-link-nodeps-dynamic-library"
+      flag_group {
+        flag: "/DEF:%{def_file_path}"
+        # We can specify a different DLL name in DEF file, /ignore:4070 suppresses
+        # the warning message about DLL name doesn't match the default one.
+        # See https://msdn.microsoft.com/en-us/library/sfkk2fz7.aspx
+        flag: "/ignore:4070"
+      }
+    }
+  }
+
+  feature {
+    name: 'windows_export_all_symbols'
+  }
+
+  feature {
+    name: 'no_windows_export_all_symbols'
+  }
+
+  linking_mode_flags { mode: DYNAMIC }
+}
diff --git a/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/METADATA b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/METADATA
new file mode 100644
index 0000000..6557f88
--- /dev/null
+++ b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/METADATA
@@ -0,0 +1 @@
+gcr.io/cloud-marketplace/google/clang-ubuntu@sha256:79a24c15949bd5770acac41b444c5c0b7f9723dcbc708c67d87ecf71e32c9126
diff --git a/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/cc_wrapper.sh b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/cc_wrapper.sh
new file mode 100755
index 0000000..42a751d
--- /dev/null
+++ b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/cc_wrapper.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+#
+# Copyright 2015 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Ship the environment to the C++ action
+#
+set -eu
+
+# Set-up the environment
+
+
+# Call the C++ compiler
+/usr/local/bin/clang "$@"
diff --git a/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/dummy_toolchain.bzl b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/dummy_toolchain.bzl
new file mode 100755
index 0000000..45c0285
--- /dev/null
+++ b/configs/experimental/ubuntu16_04_clang/1.1/bazel_0.19.0/ubsan/dummy_toolchain.bzl
@@ -0,0 +1,23 @@
+# pylint: disable=g-bad-file-header
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Skylark rule that stubs a toolchain."""
+
+def _dummy_toolchain_impl(ctx):
+    ctx = ctx  # unused argument
+    toolchain = platform_common.ToolchainInfo()
+    return [toolchain]
+
+dummy_toolchain = rule(_dummy_toolchain_impl, attrs = {})