Add 'third_party/cpp/googleapis/' from commit 'c873fd3aa1'

git-subtree-dir: third_party/cpp/googleapis
git-subtree-mainline: 438050b3d9
git-subtree-split: c873fd3aa1

third_party/cpp/googleapis/cmake/config.cmake.in

@@ -0,0 +1,51 @@
+# ~~~
+# Copyright 2019 Google LLC
+#
+# 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.
+# ~~~
+
+include("${CMAKE_CURRENT_LIST_DIR}/FindProtobufTargets.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/FindgRPC.cmake")
+
+include("${CMAKE_CURRENT_LIST_DIR}/googleapis-targets.cmake")
+
+foreach (_target
+         api_annotations
+         api_auth
+         api_client
+         api_field_behavior
+         api_http
+         api_resource
+         bigtable
+         cloud_bigquery
+         devtools_cloudtrace_v2_trace
+         devtools_cloudtrace_v2_tracing
+         iam_v1_iam_policy
+         iam_v1_options
+         iam_v1_policy
+         longrunning_operations
+         pubsub
+         rpc_error_details
+         rpc_status
+         spanner
+         storage
+         type_expr)
+    set(scoped_name "googleapis-c++::${_target}_protos")
+    set(imported_name "googleapis_cpp_${_target}_protos")
+    if (NOT TARGET ${scoped_name})
+        add_library(${scoped_name} IMPORTED INTERFACE)
+        set_target_properties(${scoped_name}
+                              PROPERTIES INTERFACE_LINK_LIBRARIES
+                              ${imported_name})
+    endif ()
+endforeach ()