Fix google-cloud-cpp build failures on CMake 3.30.

ports/README.md

@@ -36,3 +36,4 @@ After copying the port, add an entry to the table below. You should also contrib
 | `azure-storage-common-cpp` | Patching to disable default features on libxml2 (https://github.com/Azure/azure-sdk-for-cpp/pull/5221). |
 | `libfaketime`              | Port does not yet exist upstream                                                                        |
 | `vcpkg-cmake-config`       | Patching to fix build issues with CMake 3.29.1. (https://github.com/microsoft/vcpkg/pull/38017)         |
+| `google-cloud-cpp`         | Patching to remove dependency on GMock. (https://github.com/microsoft/vcpkg/pull/39802)                 |

ports/google-cloud-cpp/portfile.cmake

@@ -0,0 +1,86 @@
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO googleapis/google-cloud-cpp
+    REF "v${VERSION}"
+    SHA512 a392da19ac353409ecbf30e390803b2e34670552fd54466a08ee554a77c893d447289b30d5841c7f79b2a23244a269d8ecac8f7fbd8a34dda45ce2d8b1d46817
+    HEAD_REF main
+    PATCHES
+        support_absl_cxx17.patch
+        remove_gmock.patch
+)
+
+if ("grpc-common" IN_LIST FEATURES)
+    vcpkg_add_to_path(PREPEND "${CURRENT_HOST_INSTALLED_DIR}/tools/grpc")
+endif ()
+
+set(GOOGLE_CLOUD_CPP_ENABLE "${FEATURES}")
+list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "core")
+# This feature does not exist, but allows us to simplify the vcpkg.json
+# file.
+list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "grpc-common")
+list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "rest-common")
+list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "googleapis")
+# google-cloud-cpp uses dialogflow_cx and dialogflow_es. Underscores
+# are invalid in `vcpkg` features, we use dashes (`-`) as a separator
+# for the `vcpkg` feature name, and convert it here to something that
+# `google-cloud-cpp` would like.
+if ("dialogflow-cx" IN_LIST FEATURES)
+    list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "dialogflow-cx")
+    list(APPEND GOOGLE_CLOUD_CPP_ENABLE "dialogflow_cx")
+endif ()
+if ("dialogflow-es" IN_LIST FEATURES)
+    list(REMOVE_ITEM GOOGLE_CLOUD_CPP_ENABLE "dialogflow-es")
+    list(APPEND GOOGLE_CLOUD_CPP_ENABLE "dialogflow_es")
+endif ()
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    DISABLE_PARALLEL_CONFIGURE
+    OPTIONS
+        "-DGOOGLE_CLOUD_CPP_ENABLE=${GOOGLE_CLOUD_CPP_ENABLE}"
+        -DGOOGLE_CLOUD_CPP_ENABLE_MACOS_OPENSSL_CHECK=OFF
+        -DGOOGLE_CLOUD_CPP_ENABLE_WERROR=OFF
+        -DGOOGLE_CLOUD_CPP_ENABLE_CCACHE=OFF
+        -DGOOGLE_CLOUD_CPP_ENABLE_EXAMPLES=OFF
+        -DBUILD_TESTING=OFF
+        # This is needed by the `experimental-storage-grpc` feature until vcpkg
+        # gets Protobuf >= 4.23.0.  It has no effect for other features, so
+        # it is simpler to just always turn it on.
+        -DGOOGLE_CLOUD_CPP_ENABLE_CTYPE_CORD_WORKAROUND=ON
+)
+
+vcpkg_cmake_install()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
+foreach(feature IN LISTS FEATURES)
+    set(config_path "lib/cmake/google_cloud_cpp_${feature}")
+    # Most features get their own package in `google-cloud-cpp`.
+    # The exceptions are captured by this `if()` command, basically
+    # things like `core` and `experimental-storage-grpc` are skipped.
+    if(NOT IS_DIRECTORY "${CURRENT_PACKAGES_DIR}/${config_path}")
+        continue()
+    endif()
+    vcpkg_cmake_config_fixup(PACKAGE_NAME "google_cloud_cpp_${feature}"
+                             CONFIG_PATH "${config_path}"
+                             DO_NOT_DELETE_PARENT_CONFIG_PATH)
+endforeach()
+# These packages are automatically installed depending on what features are
+# enabled.
+foreach(suffix common compute_protos googleapis grpc_utils iam_v2 logging_type rest_internal rest_protobuf_internal dialogflow_cx dialogflow_es)
+    set(config_path "lib/cmake/google_cloud_cpp_${suffix}")
+    if(NOT IS_DIRECTORY "${CURRENT_PACKAGES_DIR}/${config_path}")
+        continue()
+    endif()
+    vcpkg_cmake_config_fixup(PACKAGE_NAME "google_cloud_cpp_${suffix}"
+                             CONFIG_PATH "${config_path}"
+                             DO_NOT_DELETE_PARENT_CONFIG_PATH)
+endforeach()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/lib/cmake"
+                    "${CURRENT_PACKAGES_DIR}/debug/lib/cmake"
+                    "${CURRENT_PACKAGES_DIR}/debug/share")
+file(INSTALL "${SOURCE_PATH}/LICENSE" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}" RENAME copyright)
+
+vcpkg_copy_pdbs()

ports/google-cloud-cpp/remove_gmock.patch

@@ -0,0 +1,28 @@
+diff --git a/google/cloud/google_cloud_cpp_common.cmake b/google/cloud/google_cloud_cpp_common.cmake
+index 1a14c77..4e8058e 100644
+--- a/google/cloud/google_cloud_cpp_common.cmake
++++ b/google/cloud/google_cloud_cpp_common.cmake
+@@ -271,9 +271,6 @@ set(google_cloud_cpp_mocks_hdrs
+     mocks/mock_stream_range.h)
+ export_list_to_bazel("google_cloud_cpp_mocks.bzl" "google_cloud_cpp_mocks_hdrs"
+                      YEAR "2022")
+-target_link_libraries(
+-    google_cloud_cpp_mocks INTERFACE google-cloud-cpp::common GTest::gmock_main
+-                                     GTest::gmock GTest::gtest)
+ set_target_properties(google_cloud_cpp_mocks PROPERTIES EXPORT_NAME
+                                                         google-cloud-cpp::mocks)
+ target_include_directories(
+diff --git a/google/cloud/storage/google_cloud_cpp_storage_grpc.cmake b/google/cloud/storage/google_cloud_cpp_storage_grpc.cmake
+index a12bb20..eb3182f 100644
+--- a/google/cloud/storage/google_cloud_cpp_storage_grpc.cmake
++++ b/google/cloud/storage/google_cloud_cpp_storage_grpc.cmake
+@@ -219,9 +219,6 @@ set(google_cloud_cpp_storage_grpc_mocks_hdrs
+     mocks/mock_async_writer_connection.h)
+ export_list_to_bazel("google_cloud_cpp_storage_grpc_mocks.bzl"
+                      "google_cloud_cpp_storage_grpc_mocks_hdrs" YEAR "2023")
+-target_link_libraries(
+-    google_cloud_cpp_storage_grpc_mocks
+-    INTERFACE google-cloud-cpp::experimental-storage_grpc GTest::gmock)
+ set_target_properties(
+     google_cloud_cpp_storage_grpc_mocks
+     PROPERTIES EXPORT_NAME "google-cloud-cpp::experimental-storage_grpc_mocks")

ports/google-cloud-cpp/support_absl_cxx17.patch

@@ -0,0 +1,19 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 3fb0564..b4a251b 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -29,6 +29,14 @@ if (NOT "${PROJECT_VERSION_PRE_RELEASE}" STREQUAL "")
+     set(PROJECT_VERSION "${PROJECT_VERSION}-${PROJECT_VERSION_PRE_RELEASE}")
+ endif ()
+
++find_package(absl CONFIG REQUIRED)
++
++# Use CMAKE_CXX_STANDARD=17 if ABSL_USE_CXX17 is set
++if (ABSL_USE_CXX17)
++    message(STATUS "Found absl uses CXX17, enable CXX17 feature.")
++    set(CMAKE_CXX_STANDARD 17)
++endif ()
++
+ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.3)
+         message(