fix: experimental bigquery iam cmake target installation (#7151)

Author: scotthart

google/cloud/bigquery/CMakeLists.txt

@@ -69,11 +69,6 @@ set_target_properties(
     PROPERTIES EXPORT_NAME google-cloud-cpp::bigquery VERSION
                                                       "${PROJECT_VERSION}"
                SOVERSION "${PROJECT_VERSION_MAJOR}")
-set_target_properties(
-    google_cloud_cpp_bigquery
-    PROPERTIES EXPORT_NAME google-cloud-cpp::experimental-bigquery
-               VERSION "${PROJECT_VERSION}" SOVERSION
-                                            "${PROJECT_VERSION_MAJOR}")
 target_compile_options(google_cloud_cpp_bigquery
                        PUBLIC ${GOOGLE_CLOUD_CPP_EXCEPTIONS_FLAG})
 

google/cloud/bigquery/config.cmake.in

@@ -20,3 +20,12 @@ find_dependency(google_cloud_cpp_grpc_utils)
 find_dependency(absl)
 
 include("${CMAKE_CURRENT_LIST_DIR}/google_cloud_cpp_bigquery-targets.cmake")
+
+add_library(google-cloud-cpp::experimental-bigquery IMPORTED INTERFACE)
+set_target_properties(google-cloud-cpp::experimental-bigquery PROPERTIES
+    INTERFACE_LINK_LIBRARIES "google-cloud-cpp::bigquery")
+if (CMAKE_VERSION VERSION_GREATER 3.17)
+    set_target_properties(google-cloud-cpp::experimental-bigquery PROPERTIES
+        DEPRECATION
+        "This target will be removed on or about 2021-09-01, please use google-cloud-cpp::bigquery instead")
+endif()

google/cloud/iam/CMakeLists.txt

@@ -84,11 +84,6 @@ set_target_properties(
     google_cloud_cpp_iam
     PROPERTIES EXPORT_NAME google-cloud-cpp::iam VERSION "${PROJECT_VERSION}"
                SOVERSION "${PROJECT_VERSION_MAJOR}")
-set_target_properties(
-    google_cloud_cpp_iam
-    PROPERTIES EXPORT_NAME google-cloud-cpp::experimental-iam
-               VERSION "${PROJECT_VERSION}" SOVERSION
-                                            "${PROJECT_VERSION_MAJOR}")
 target_compile_options(google_cloud_cpp_iam
                        PUBLIC ${GOOGLE_CLOUD_CPP_EXCEPTIONS_FLAG})
 

google/cloud/iam/config.cmake.in

@@ -20,3 +20,12 @@ find_dependency(google_cloud_cpp_grpc_utils)
 find_dependency(absl)
 
 include("${CMAKE_CURRENT_LIST_DIR}/google_cloud_cpp_iam-targets.cmake")
+
+add_library(google-cloud-cpp::experimental-iam IMPORTED INTERFACE)
+set_target_properties(google-cloud-cpp::experimental-iam PROPERTIES
+    INTERFACE_LINK_LIBRARIES "google-cloud-cpp::iam")
+if (CMAKE_VERSION VERSION_GREATER 3.17)
+    set_target_properties(google-cloud-cpp::experimental-iam PROPERTIES
+        DEPRECATION
+        "This target will be removed on or about 2021-09-01, please use google-cloud-cpp::iam instead")
+endif()