Add 'third_party/abseil_cpp/' from commit '768eb2ca2857342673fcd462792ce04b8bac3fa3' r/781

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54beb5796cd408fbe15d2d2da09ff37adf
git-subtree-split: 768eb2ca2857342673fcd462792ce04b8bac3fa3

1 files changed, 41 insertions, 0 deletions

diff --git a/third_party/abseil_cpp/CMake/Googletest/DownloadGTest.cmake b/third_party/abseil_cpp/CMake/Googletest/DownloadGTest.cmake
new file mode 100644
index 000000000000..9d071c917011
--- /dev/null
+++ b/third_party/abseil_cpp/CMake/Googletest/DownloadGTest.cmake
@@ -0,0 +1,41 @@
+# Integrates googletest at configure time.  Based on the instructions at
+# https://github.com/google/googletest/tree/master/googletest#incorporating-into-an-existing-cmake-project
+
+# Set up the external googletest project, downloading the latest from Github
+# master if requested.
+configure_file(
+  ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in
+  ${CMAKE_BINARY_DIR}/googletest-external/CMakeLists.txt
+)
+
+set(ABSL_SAVE_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
+set(ABSL_SAVE_CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
+if (BUILD_SHARED_LIBS)
+  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGTEST_CREATE_SHARED_LIBRARY=1")
+endif()
+
+# Configure and build the googletest source.
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-external )
+if(result)
+  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/googletest-external)
+if(result)
+  message(FATAL_ERROR "Build step for googletest failed: ${result}")
+endif()
+
+set(CMAKE_CXX_FLAGS ${ABSL_SAVE_CMAKE_CXX_FLAGS})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${ABSL_SAVE_CMAKE_RUNTIME_OUTPUT_DIRECTORY})
+
+# Prevent overriding the parent project's compiler/linker settings on Windows
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+# Add googletest directly to our build. This defines the gtest and gtest_main
+# targets.
+add_subdirectory(${absl_gtest_src_dir} ${absl_gtest_build_dir} EXCLUDE_FROM_ALL)