Replace config_setting.values{"compiler"} with config_setting.flag_values{"@bazel_tools//tools/cpp:compiler"}

2 files changed, 38 insertions, 4 deletions

diff --git a/third_party/protobuf/3.6.0/BUILD b/third_party/protobuf/3.6.0/BUILD
index ca503be57d..e9674eeda9 100644
--- a/third_party/protobuf/3.6.0/BUILD
+++ b/third_party/protobuf/3.6.0/BUILD
@@ -101,10 +101,9 @@ COPTS = select({
     ],
 })
 
-config_setting(
-    name = "msvc",
-    values = { "compiler": "msvc-cl" },
-)
+load(":compiler_config_setting.bzl", "create_compiler_config_setting")
+
+create_compiler_config_setting(name = "msvc", value = "msvc-cl")
 
 config_setting(
     name = "android",
diff --git a/third_party/protobuf/3.6.0/compiler_config_setting.bzl b/third_party/protobuf/3.6.0/compiler_config_setting.bzl
new file mode 100644
index 0000000000..21b1cdb788
--- /dev/null
+++ b/third_party/protobuf/3.6.0/compiler_config_setting.bzl
@@ -0,0 +1,35 @@
+# 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.
+
+"""Creates config_setting that allows selecting based on 'compiler' value."""
+
+def create_compiler_config_setting(name, value):
+    # The "do_not_use_tools_cpp_compiler_present" attribute exists to
+    # distinguish between older versions of Bazel that do not support
+    # "@bazel_tools//tools/cpp:compiler" flag_value, and newer ones that do.
+    # In the future, the only way to select on the compiler will be through
+    # flag_values{"@bazel_tools//tools/cpp:compiler"} and the else branch can
+    # be removed.
+    if hasattr(cc_common, "do_not_use_tools_cpp_compiler_present"):
+        native.config_setting(
+            name = name,
+            flag_values = {
+                "@bazel_tools//tools/cpp:compiler": value,
+            },
+        )
+    else:
+        native.config_setting(
+            name = name,
+            values = {"compiler": value},
+        )