Do not autodetect C++ toolchain when BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1 is present
This is useful e.g. when all C++ builds happen remotely and there's no C++
toolchain installed on the host machine.
Fixes #5133.
RELNOTES: None.
PiperOrigin-RevId: 196798471
diff --git a/tools/cpp/BUILD.empty b/tools/cpp/BUILD.empty
new file mode 100644
index 0000000..1335d5d
--- /dev/null
+++ b/tools/cpp/BUILD.empty
@@ -0,0 +1,48 @@
+# 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.
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+ name = "malloc",
+)
+
+cc_library(
+ name = "stl",
+)
+
+filegroup(
+ name = "empty",
+ srcs = [],
+)
+
+cc_toolchain_suite(
+ name = "toolchain",
+ toolchains = {
+ "local|local": ":local",
+ },
+)
+
+cc_toolchain(
+ name = "local",
+ 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",
+)
