diff --git a/third_party/toolchains/preconfig/win_1803/BUILD b/third_party/toolchains/preconfig/win_1803/BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..6b798dfc3a4d449882df579a4fc837928553c4a2
--- /dev/null
+++ b/third_party/toolchains/preconfig/win_1803/BUILD
@@ -0,0 +1,26 @@
+licenses(["restricted"])
+
+package(default_visibility = ["//visibility:public"])
+
+java_runtime(
+    name = "windows_jdk8",
+    srcs = [],
+    java_home = "C:/openjdk",
+)
+
+platform(
+    name = "rbe_windows_1803",
+    constraint_values = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+    ],
+    remote_execution_properties = """
+        properties:{
+          name:"container-image"
+          value:"docker://gcr.io/tensorflow-testing/tf-rbe-win@sha256:b2eeb661e0134ef96a4736677e8f96a90970bc206dea93739cd711031b62a0e5"
+        }
+        properties:{
+          name: "OSFamily" value: "Windows"
+        }
+        """,
+)
diff --git a/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/BUILD b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..c00f005e46cb727265886e98313c790875a85089
--- /dev/null
+++ b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/BUILD
@@ -0,0 +1,155 @@
+# Copyright 2018 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 Windows.
+
+licenses(["restricted"])
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "malloc",
+)
+
+cc_library(
+    name = "stl",
+)
+
+filegroup(
+    name = "empty",
+    srcs = [],
+)
+
+# Hardcoded toolchain, legacy behaviour.
+cc_toolchain_suite(
+    name = "toolchain",
+    toolchains = {
+        "armeabi-v7a|compiler": ":cc-compiler-armeabi-v7a",
+        "x64_windows|msvc-cl": ":cc-compiler-x64_windows",
+        "x64_windows|msys-gcc": ":cc-compiler-x64_windows_msys",
+        "x64_windows|mingw-gcc": ":cc-compiler-x64_windows_mingw",
+    },
+)
+
+cc_toolchain(
+    name = "cc-compiler-x64_windows_msys",
+    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-x64_windows_msys",
+    exec_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+        "@bazel_tools//tools/cpp:msys",
+    ],
+    target_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+    ],
+    toolchain = ":cc-compiler-x64_windows_msys",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
+
+cc_toolchain(
+    name = "cc-compiler-x64_windows_mingw",
+    all_files = ":empty",
+    compiler_files = ":empty",
+    cpu = "x64_windows",
+    dwp_files = ":empty",
+    dynamic_runtime_libs = [":empty"],
+    linker_files = ":empty",
+    objcopy_files = ":empty",
+    static_runtime_libs = [":empty"],
+    strip_files = ":empty",
+    supports_param_files = 0,
+)
+
+toolchain(
+    name = "cc-toolchain-x64_windows_mingw",
+    exec_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+        "@bazel_tools//tools/cpp:mingw",
+    ],
+    target_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+    ],
+    toolchain = ":cc-compiler-x64_windows_mingw",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
+
+cc_toolchain(
+    name = "cc-compiler-x64_windows",
+    all_files = ":empty",
+    compiler_files = ":empty",
+    cpu = "x64_windows",
+    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-x64_windows",
+    exec_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+    ],
+    target_compatible_with = [
+        "@bazel_tools//platforms:x86_64",
+        "@bazel_tools//platforms:windows",
+    ],
+    toolchain = ":cc-compiler-x64_windows",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
+
+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 = [
+    ],
+    target_compatible_with = [
+        "@bazel_tools//platforms:arm",
+        "@bazel_tools//platforms:android",
+    ],
+    toolchain = ":cc-compiler-armeabi-v7a",
+    toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
+)
diff --git a/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/CROSSTOOL b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/CROSSTOOL
new file mode 100644
index 0000000000000000000000000000000000000000..04c8bcae456ad71e961a2a2f7dfa05875f666260
--- /dev/null
+++ b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/CROSSTOOL
@@ -0,0 +1,1212 @@
+# 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: "x64_windows"
+  toolchain_identifier: "msvc_x64"
+}
+
+default_toolchain {
+  cpu: "local"
+  toolchain_identifier: "stub_armeabi-v7a"
+}
+
+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: "msys_x64"
+}
+
+# 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: "msys_x64"
+   abi_version: "local"
+   abi_libc_version: "local"
+   builtin_sysroot: ""
+   compiler: "msys-gcc"
+   host_system_name: "local"
+   needsPic: false
+   target_libc: "msys"
+   target_cpu: "x64_windows"
+   target_system_name: "local"
+   tool_path { name: "ar" path: "c:/tools/msys64/usr/bin/ar" }
+   tool_path { name: "compat-ld" path: "c:/tools/msys64/usr/bin/ld" }
+   tool_path { name: "cpp" path: "c:/tools/msys64/usr/bin/cpp" }
+   tool_path { name: "dwp" path: "c:/tools/msys64/usr/bin/dwp" }
+   tool_path { name: "gcc" path: "c:/tools/msys64/usr/bin/gcc" }
+   artifact_name_pattern { category_name: "executable" prefix: "" extension: ".exe"}
+   cxx_flag: "-std=gnu++0x"
+   linker_flag: "-lstdc++"
+   cxx_builtin_include_directory: "c:/tools/msys64/usr/"
+   tool_path { name: "gcov" path: "c:/tools/msys64/usr/bin/gcov" }
+   tool_path { name: "ld" path: "c:/tools/msys64/usr/bin/ld" }
+   tool_path { name: "nm" path: "c:/tools/msys64/usr/bin/nm" }
+   tool_path { name: "objcopy" path: "c:/tools/msys64/usr/bin/objcopy" }
+   objcopy_embed_flag: "-I"
+   objcopy_embed_flag: "binary"
+   tool_path { name: "objdump" path: "c:/tools/msys64/usr/bin/objdump" }
+   tool_path { name: "strip" path: "c:/tools/msys64/usr/bin/strip" }   feature { name: "targets_windows" implies: "copy_dynamic_libraries_to_binary" enabled: true }   feature { name: "copy_dynamic_libraries_to_binary" }
+
+  compilation_mode_flags {
+    mode: DBG
+
+  }
+  compilation_mode_flags {
+    mode: OPT
+
+  }
+  linking_mode_flags { mode: DYNAMIC }
+
+
+
+  feature {
+    name: 'fdo_optimize'
+    provides: 'profile'
+    flag_set {
+      action: 'c-compile'
+      action: 'c++-compile'
+      expand_if_all_available: 'fdo_profile_path'
+      flag_group {
+        flag: '-fprofile-use=%{fdo_profile_path}'
+        flag: '-fprofile-correction',
+      }
+    }
+  }
+}
+
+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'
+  }
+
+   tool_path { name: "ar" path: "c:/tools/msys64/mingw64/bin/ar" }
+   tool_path { name: "compat-ld" path: "c:/tools/msys64/mingw64/bin/ld" }
+   tool_path { name: "cpp" path: "c:/tools/msys64/mingw64/bin/cpp" }
+   tool_path { name: "dwp" path: "c:/tools/msys64/mingw64/bin/dwp" }
+   tool_path { name: "gcc" path: "c:/tools/msys64/mingw64/bin/gcc" }
+   artifact_name_pattern { category_name: "executable" prefix: "" extension: ".exe"}
+   cxx_flag: "-std=gnu++0x"
+   linker_flag: "-lstdc++"
+   cxx_builtin_include_directory: "c:/tools/msys64/mingw64/"
+   tool_path { name: "gcov" path: "c:/tools/msys64/mingw64/bin/gcov" }
+   tool_path { name: "ld" path: "c:/tools/msys64/mingw64/bin/ld" }
+   tool_path { name: "nm" path: "c:/tools/msys64/mingw64/bin/nm" }
+   tool_path { name: "objcopy" path: "c:/tools/msys64/mingw64/bin/objcopy" }
+   objcopy_embed_flag: "-I"
+   objcopy_embed_flag: "binary"
+   tool_path { name: "objdump" path: "c:/tools/msys64/mingw64/bin/objdump" }
+   tool_path { name: "strip" path: "c:/tools/msys64/mingw64/bin/strip" }   feature { name: "targets_windows" implies: "copy_dynamic_libraries_to_binary" enabled: true }   feature { name: "copy_dynamic_libraries_to_binary" }
+
+  linking_mode_flags { mode: DYNAMIC }
+}
+
+toolchain {
+  toolchain_identifier: "msvc_x64"
+  # This is a workaround for https://github.com/bazelbuild/bazel/issues/5087.
+  cxx_builtin_include_directory: "C:\\botcode\\w"
+  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"
+
+cxx_builtin_include_directory: "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\INCLUDE"
+cxx_builtin_include_directory: "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.10240.0\\ucrt"
+cxx_builtin_include_directory: "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\shared"
+cxx_builtin_include_directory: "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\um"
+cxx_builtin_include_directory: "C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\winrt"
+
+  tool_path {
+    name: "ar"
+    path: "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/lib.exe"
+  }
+  tool_path {
+    name: "ml"
+    path: "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/ml64.exe"
+  }
+  tool_path {
+    name: "cpp"
+    path: "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe"
+  }
+  tool_path {
+    name: "gcc"
+    path: "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe"
+  }
+  tool_path {
+    name: "gcov"
+    path: "wrapper/bin/msvc_nop.bat"
+  }
+  tool_path {
+    name: "ld"
+    path: "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/link.exe"
+  }
+  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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/ml64.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/ml64.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/cl.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/link.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/link.exe'
+    }
+    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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/link.exe'
+      }
+      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: 'C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/lib.exe'
+    }
+    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: "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\amd64;C:\\Windows\\Microsoft.NET\\Framework64\\v4.0.30319;C:\\Windows\\Microsoft.NET\\Framework64\\;C:\\Program Files (x86)\\Windows Kits\\8.1\\bin\\x64;C:\\Program Files (x86)\\Windows Kits\\8.1\\bin\\x86;;C:\\Windows\\system32"
+      }
+      env_entry {
+        key: "TMP"
+        value: "C:\\Users\\ContainerAdministrator\\AppData\\Local\\Temp"
+      }
+      env_entry {
+        key: "TEMP"
+        value: "C:\\Users\\ContainerAdministrator\\AppData\\Local\\Temp"
+      }
+    }
+    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: "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\INCLUDE;C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.10240.0\\ucrt;C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\shared;C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\um;C:\\Program Files (x86)\\Windows Kits\\8.1\\include\\winrt;"
+      }
+    }
+  }
+
+  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: "C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\LIB\\amd64;C:\\Program Files (x86)\\Windows Kits\\10\\lib\\10.0.10240.0\\ucrt\\x64;C:\\Program Files (x86)\\Windows Kits\\8.1\\lib\\winv6.3\\um\\x64;"
+      }
+    }
+  }
+
+  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: "/DEBUG:FULL"
+        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: "/DEBUG:FASTLINK"
+        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/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/dummy_toolchain.bzl b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/dummy_toolchain.bzl
new file mode 100644
index 0000000000000000000000000000000000000000..45c0285d232806672e93cb6d9b860b2693e75d3d
--- /dev/null
+++ b/third_party/toolchains/preconfig/win_1803/bazel_6f8e36b/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 = {})
diff --git a/third_party/toolchains/preconfig/win_1803/py36/BUILD b/third_party/toolchains/preconfig/win_1803/py36/BUILD
new file mode 100644
index 0000000000000000000000000000000000000000..7b2e84bb38e11173ba20807cc072810e7b86b678
--- /dev/null
+++ b/third_party/toolchains/preconfig/win_1803/py36/BUILD
@@ -0,0 +1,191 @@
+licenses(["restricted"])
+
+package(default_visibility = ["//visibility:public"])
+
+# To build Python C/C++ extension on Windows, we need to link to python import library pythonXY.lib
+# See https://docs.python.org/3/extending/windows.html
+cc_import(
+    name = "python_lib",
+    interface_library = select({
+        ":windows": ":python_import_lib",
+        # A placeholder for Unix platforms which makes --no_build happy.
+        "//conditions:default": "not-existing.lib",
+    }),
+    system_provided = 1,
+)
+
+cc_library(
+    name = "python_headers",
+    hdrs = [":python_include"],
+    includes = ["python_include"],
+    deps = select({
+        ":windows": [":python_lib"],
+        "//conditions:default": [],
+    }),
+)
+
+cc_library(
+    name = "numpy_headers",
+    hdrs = [":numpy_include"],
+    includes = ["numpy_include"],
+)
+
+config_setting(
+    name = "windows",
+    values = {"cpu": "x64_windows"},
+    visibility = ["//visibility:public"],
+)
+
+genrule(
+    name = "python_include",
+    outs = [
+        "python_include/Python-ast.h",
+        "python_include/Python.h",
+        "python_include/abstract.h",
+        "python_include/accu.h",
+        "python_include/asdl.h",
+        "python_include/ast.h",
+        "python_include/bitset.h",
+        "python_include/bltinmodule.h",
+        "python_include/boolobject.h",
+        "python_include/bytearrayobject.h",
+        "python_include/bytes_methods.h",
+        "python_include/bytesobject.h",
+        "python_include/cellobject.h",
+        "python_include/ceval.h",
+        "python_include/classobject.h",
+        "python_include/code.h",
+        "python_include/codecs.h",
+        "python_include/compile.h",
+        "python_include/complexobject.h",
+        "python_include/datetime.h",
+        "python_include/descrobject.h",
+        "python_include/dictobject.h",
+        "python_include/dtoa.h",
+        "python_include/dynamic_annotations.h",
+        "python_include/enumobject.h",
+        "python_include/errcode.h",
+        "python_include/eval.h",
+        "python_include/fileobject.h",
+        "python_include/fileutils.h",
+        "python_include/floatobject.h",
+        "python_include/frameobject.h",
+        "python_include/funcobject.h",
+        "python_include/genobject.h",
+        "python_include/graminit.h",
+        "python_include/grammar.h",
+        "python_include/import.h",
+        "python_include/intrcheck.h",
+        "python_include/iterobject.h",
+        "python_include/listobject.h",
+        "python_include/longintrepr.h",
+        "python_include/longobject.h",
+        "python_include/marshal.h",
+        "python_include/memoryobject.h",
+        "python_include/metagrammar.h",
+        "python_include/methodobject.h",
+        "python_include/modsupport.h",
+        "python_include/moduleobject.h",
+        "python_include/namespaceobject.h",
+        "python_include/node.h",
+        "python_include/object.h",
+        "python_include/objimpl.h",
+        "python_include/odictobject.h",
+        "python_include/opcode.h",
+        "python_include/osdefs.h",
+        "python_include/osmodule.h",
+        "python_include/parsetok.h",
+        "python_include/patchlevel.h",
+        "python_include/pgen.h",
+        "python_include/pgenheaders.h",
+        "python_include/py_curses.h",
+        "python_include/pyarena.h",
+        "python_include/pyatomic.h",
+        "python_include/pycapsule.h",
+        "python_include/pyconfig.h",
+        "python_include/pyctype.h",
+        "python_include/pydebug.h",
+        "python_include/pydtrace.h",
+        "python_include/pyerrors.h",
+        "python_include/pyexpat.h",
+        "python_include/pyfpe.h",
+        "python_include/pygetopt.h",
+        "python_include/pyhash.h",
+        "python_include/pylifecycle.h",
+        "python_include/pymacconfig.h",
+        "python_include/pymacro.h",
+        "python_include/pymath.h",
+        "python_include/pymem.h",
+        "python_include/pyport.h",
+        "python_include/pystate.h",
+        "python_include/pystrcmp.h",
+        "python_include/pystrhex.h",
+        "python_include/pystrtod.h",
+        "python_include/pythonrun.h",
+        "python_include/pythread.h",
+        "python_include/pytime.h",
+        "python_include/rangeobject.h",
+        "python_include/setobject.h",
+        "python_include/sliceobject.h",
+        "python_include/structmember.h",
+        "python_include/structseq.h",
+        "python_include/symtable.h",
+        "python_include/sysmodule.h",
+        "python_include/token.h",
+        "python_include/traceback.h",
+        "python_include/tupleobject.h",
+        "python_include/typeslots.h",
+        "python_include/ucnhash.h",
+        "python_include/unicodeobject.h",
+        "python_include/warnings.h",
+        "python_include/weakrefobject.h",
+    ],
+    cmd = """
+cp -f "C:/Python36/include/Python-ast.h" "$(@D)/python_include/Python-ast.h" && cp -f "C:/Python36/include/Python.h" "$(@D)/python_include/Python.h" && cp -f "C:/Python36/include/abstract.h" "$(@D)/python_include/abstract.h" && cp -f "C:/Python36/include/accu.h" "$(@D)/python_include/accu.h" && cp -f "C:/Python36/include/asdl.h" "$(@D)/python_include/asdl.h" && cp -f "C:/Python36/include/ast.h" "$(@D)/python_include/ast.h" && cp -f "C:/Python36/include/bitset.h" "$(@D)/python_include/bitset.h" && cp -f "C:/Python36/include/bltinmodule.h" "$(@D)/python_include/bltinmodule.h" && cp -f "C:/Python36/include/boolobject.h" "$(@D)/python_include/boolobject.h" && cp -f "C:/Python36/include/bytearrayobject.h" "$(@D)/python_include/bytearrayobject.h" && cp -f "C:/Python36/include/bytes_methods.h" "$(@D)/python_include/bytes_methods.h" && cp -f "C:/Python36/include/bytesobject.h" "$(@D)/python_include/bytesobject.h" && cp -f "C:/Python36/include/cellobject.h" "$(@D)/python_include/cellobject.h" && cp -f "C:/Python36/include/ceval.h" "$(@D)/python_include/ceval.h" && cp -f "C:/Python36/include/classobject.h" "$(@D)/python_include/classobject.h" && cp -f "C:/Python36/include/code.h" "$(@D)/python_include/code.h" && cp -f "C:/Python36/include/codecs.h" "$(@D)/python_include/codecs.h" && cp -f "C:/Python36/include/compile.h" "$(@D)/python_include/compile.h" && cp -f "C:/Python36/include/complexobject.h" "$(@D)/python_include/complexobject.h" && cp -f "C:/Python36/include/datetime.h" "$(@D)/python_include/datetime.h" && cp -f "C:/Python36/include/descrobject.h" "$(@D)/python_include/descrobject.h" && cp -f "C:/Python36/include/dictobject.h" "$(@D)/python_include/dictobject.h" && cp -f "C:/Python36/include/dtoa.h" "$(@D)/python_include/dtoa.h" && cp -f "C:/Python36/include/dynamic_annotations.h" "$(@D)/python_include/dynamic_annotations.h" && cp -f "C:/Python36/include/enumobject.h" "$(@D)/python_include/enumobject.h" && cp -f "C:/Python36/include/errcode.h" "$(@D)/python_include/errcode.h" && cp -f "C:/Python36/include/eval.h" "$(@D)/python_include/eval.h" && cp -f "C:/Python36/include/fileobject.h" "$(@D)/python_include/fileobject.h" && cp -f "C:/Python36/include/fileutils.h" "$(@D)/python_include/fileutils.h" && cp -f "C:/Python36/include/floatobject.h" "$(@D)/python_include/floatobject.h" && cp -f "C:/Python36/include/frameobject.h" "$(@D)/python_include/frameobject.h" && cp -f "C:/Python36/include/funcobject.h" "$(@D)/python_include/funcobject.h" && cp -f "C:/Python36/include/genobject.h" "$(@D)/python_include/genobject.h" && cp -f "C:/Python36/include/graminit.h" "$(@D)/python_include/graminit.h" && cp -f "C:/Python36/include/grammar.h" "$(@D)/python_include/grammar.h" && cp -f "C:/Python36/include/import.h" "$(@D)/python_include/import.h" && cp -f "C:/Python36/include/intrcheck.h" "$(@D)/python_include/intrcheck.h" && cp -f "C:/Python36/include/iterobject.h" "$(@D)/python_include/iterobject.h" && cp -f "C:/Python36/include/listobject.h" "$(@D)/python_include/listobject.h" && cp -f "C:/Python36/include/longintrepr.h" "$(@D)/python_include/longintrepr.h" && cp -f "C:/Python36/include/longobject.h" "$(@D)/python_include/longobject.h" && cp -f "C:/Python36/include/marshal.h" "$(@D)/python_include/marshal.h" && cp -f "C:/Python36/include/memoryobject.h" "$(@D)/python_include/memoryobject.h" && cp -f "C:/Python36/include/metagrammar.h" "$(@D)/python_include/metagrammar.h" && cp -f "C:/Python36/include/methodobject.h" "$(@D)/python_include/methodobject.h" && cp -f "C:/Python36/include/modsupport.h" "$(@D)/python_include/modsupport.h" && cp -f "C:/Python36/include/moduleobject.h" "$(@D)/python_include/moduleobject.h" && cp -f "C:/Python36/include/namespaceobject.h" "$(@D)/python_include/namespaceobject.h" && cp -f "C:/Python36/include/node.h" "$(@D)/python_include/node.h" && cp -f "C:/Python36/include/object.h" "$(@D)/python_include/object.h" && cp -f "C:/Python36/include/objimpl.h" "$(@D)/python_include/objimpl.h" && cp -f "C:/Python36/include/odictobject.h" "$(@D)/python_include/odictobject.h" && cp -f "C:/Python36/include/opcode.h" "$(@D)/python_include/opcode.h" && cp -f "C:/Python36/include/osdefs.h" "$(@D)/python_include/osdefs.h" && cp -f "C:/Python36/include/osmodule.h" "$(@D)/python_include/osmodule.h" && cp -f "C:/Python36/include/parsetok.h" "$(@D)/python_include/parsetok.h" && cp -f "C:/Python36/include/patchlevel.h" "$(@D)/python_include/patchlevel.h" && cp -f "C:/Python36/include/pgen.h" "$(@D)/python_include/pgen.h" && cp -f "C:/Python36/include/pgenheaders.h" "$(@D)/python_include/pgenheaders.h" && cp -f "C:/Python36/include/py_curses.h" "$(@D)/python_include/py_curses.h" && cp -f "C:/Python36/include/pyarena.h" "$(@D)/python_include/pyarena.h" && cp -f "C:/Python36/include/pyatomic.h" "$(@D)/python_include/pyatomic.h" && cp -f "C:/Python36/include/pycapsule.h" "$(@D)/python_include/pycapsule.h" && cp -f "C:/Python36/include/pyconfig.h" "$(@D)/python_include/pyconfig.h" && cp -f "C:/Python36/include/pyctype.h" "$(@D)/python_include/pyctype.h" && cp -f "C:/Python36/include/pydebug.h" "$(@D)/python_include/pydebug.h" && cp -f "C:/Python36/include/pydtrace.h" "$(@D)/python_include/pydtrace.h" && cp -f "C:/Python36/include/pyerrors.h" "$(@D)/python_include/pyerrors.h" && cp -f "C:/Python36/include/pyexpat.h" "$(@D)/python_include/pyexpat.h" && cp -f "C:/Python36/include/pyfpe.h" "$(@D)/python_include/pyfpe.h" && cp -f "C:/Python36/include/pygetopt.h" "$(@D)/python_include/pygetopt.h" && cp -f "C:/Python36/include/pyhash.h" "$(@D)/python_include/pyhash.h" && cp -f "C:/Python36/include/pylifecycle.h" "$(@D)/python_include/pylifecycle.h" && cp -f "C:/Python36/include/pymacconfig.h" "$(@D)/python_include/pymacconfig.h" && cp -f "C:/Python36/include/pymacro.h" "$(@D)/python_include/pymacro.h" && cp -f "C:/Python36/include/pymath.h" "$(@D)/python_include/pymath.h" && cp -f "C:/Python36/include/pymem.h" "$(@D)/python_include/pymem.h" && cp -f "C:/Python36/include/pyport.h" "$(@D)/python_include/pyport.h" && cp -f "C:/Python36/include/pystate.h" "$(@D)/python_include/pystate.h" && cp -f "C:/Python36/include/pystrcmp.h" "$(@D)/python_include/pystrcmp.h" && cp -f "C:/Python36/include/pystrhex.h" "$(@D)/python_include/pystrhex.h" && cp -f "C:/Python36/include/pystrtod.h" "$(@D)/python_include/pystrtod.h" && cp -f "C:/Python36/include/pythonrun.h" "$(@D)/python_include/pythonrun.h" && cp -f "C:/Python36/include/pythread.h" "$(@D)/python_include/pythread.h" && cp -f "C:/Python36/include/pytime.h" "$(@D)/python_include/pytime.h" && cp -f "C:/Python36/include/rangeobject.h" "$(@D)/python_include/rangeobject.h" && cp -f "C:/Python36/include/setobject.h" "$(@D)/python_include/setobject.h" && cp -f "C:/Python36/include/sliceobject.h" "$(@D)/python_include/sliceobject.h" && cp -f "C:/Python36/include/structmember.h" "$(@D)/python_include/structmember.h" && cp -f "C:/Python36/include/structseq.h" "$(@D)/python_include/structseq.h" && cp -f "C:/Python36/include/symtable.h" "$(@D)/python_include/symtable.h" && cp -f "C:/Python36/include/sysmodule.h" "$(@D)/python_include/sysmodule.h" && cp -f "C:/Python36/include/token.h" "$(@D)/python_include/token.h" && cp -f "C:/Python36/include/traceback.h" "$(@D)/python_include/traceback.h" && cp -f "C:/Python36/include/tupleobject.h" "$(@D)/python_include/tupleobject.h" && cp -f "C:/Python36/include/typeslots.h" "$(@D)/python_include/typeslots.h" && cp -f "C:/Python36/include/ucnhash.h" "$(@D)/python_include/ucnhash.h" && cp -f "C:/Python36/include/unicodeobject.h" "$(@D)/python_include/unicodeobject.h" && cp -f "C:/Python36/include/warnings.h" "$(@D)/python_include/warnings.h" && cp -f "C:/Python36/include/weakrefobject.h" "$(@D)/python_include/weakrefobject.h"
+   """,
+)
+
+genrule(
+    name = "numpy_include",
+    outs = [
+        "numpy_include/numpy/__multiarray_api.h",
+        "numpy_include/numpy/__ufunc_api.h",
+        "numpy_include/numpy/_neighborhood_iterator_imp.h",
+        "numpy_include/numpy/_numpyconfig.h",
+        "numpy_include/numpy/arrayobject.h",
+        "numpy_include/numpy/arrayscalars.h",
+        "numpy_include/numpy/halffloat.h",
+        "numpy_include/numpy/multiarray_api.txt",
+        "numpy_include/numpy/ndarrayobject.h",
+        "numpy_include/numpy/ndarraytypes.h",
+        "numpy_include/numpy/noprefix.h",
+        "numpy_include/numpy/npy_1_7_deprecated_api.h",
+        "numpy_include/numpy/npy_3kcompat.h",
+        "numpy_include/numpy/npy_common.h",
+        "numpy_include/numpy/npy_cpu.h",
+        "numpy_include/numpy/npy_endian.h",
+        "numpy_include/numpy/npy_interrupt.h",
+        "numpy_include/numpy/npy_math.h",
+        "numpy_include/numpy/npy_no_deprecated_api.h",
+        "numpy_include/numpy/npy_os.h",
+        "numpy_include/numpy/numpyconfig.h",
+        "numpy_include/numpy/old_defines.h",
+        "numpy_include/numpy/oldnumeric.h",
+        "numpy_include/numpy/ufunc_api.txt",
+        "numpy_include/numpy/ufuncobject.h",
+        "numpy_include/numpy/utils.h",
+    ],
+    cmd = """
+cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h" "$(@D)/numpy_include/numpy/__multiarray_api.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/__ufunc_api.h" "$(@D)/numpy_include/numpy/__ufunc_api.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/_neighborhood_iterator_imp.h" "$(@D)/numpy_include/numpy/_neighborhood_iterator_imp.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/_numpyconfig.h" "$(@D)/numpy_include/numpy/_numpyconfig.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/arrayobject.h" "$(@D)/numpy_include/numpy/arrayobject.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/arrayscalars.h" "$(@D)/numpy_include/numpy/arrayscalars.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/halffloat.h" "$(@D)/numpy_include/numpy/halffloat.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/multiarray_api.txt" "$(@D)/numpy_include/numpy/multiarray_api.txt" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/ndarrayobject.h" "$(@D)/numpy_include/numpy/ndarrayobject.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/ndarraytypes.h" "$(@D)/numpy_include/numpy/ndarraytypes.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/noprefix.h" "$(@D)/numpy_include/numpy/noprefix.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h" "$(@D)/numpy_include/numpy/npy_1_7_deprecated_api.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_3kcompat.h" "$(@D)/numpy_include/numpy/npy_3kcompat.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_common.h" "$(@D)/numpy_include/numpy/npy_common.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_cpu.h" "$(@D)/numpy_include/numpy/npy_cpu.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_endian.h" "$(@D)/numpy_include/numpy/npy_endian.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_interrupt.h" "$(@D)/numpy_include/numpy/npy_interrupt.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_math.h" "$(@D)/numpy_include/numpy/npy_math.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_no_deprecated_api.h" "$(@D)/numpy_include/numpy/npy_no_deprecated_api.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/npy_os.h" "$(@D)/numpy_include/numpy/npy_os.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/numpyconfig.h" "$(@D)/numpy_include/numpy/numpyconfig.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/old_defines.h" "$(@D)/numpy_include/numpy/old_defines.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/oldnumeric.h" "$(@D)/numpy_include/numpy/oldnumeric.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/ufunc_api.txt" "$(@D)/numpy_include/numpy/ufunc_api.txt" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/ufuncobject.h" "$(@D)/numpy_include/numpy/ufuncobject.h" && cp -f "C:/Python36/lib/site-packages/numpy/core/include/numpy/utils.h" "$(@D)/numpy_include/numpy/utils.h"
+   """,
+)
+
+genrule(
+    name = "python_import_lib",
+    outs = [
+        "python36.lib",
+    ],
+    cmd = """
+cp -f "C:/Python36/libs/python36.lib" "$(@D)/python36.lib"
+   """,
+)