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1option(protobuf_USE_EXTERNAL_GTEST "Use external Google Test (i.e. not the one in third_party/googletest)" OFF)
2
3if (protobuf_USE_EXTERNAL_GTEST)
4  find_package(GTest REQUIRED CONFIG)
5else()
6  if (NOT EXISTS "${protobuf_SOURCE_DIR}/third_party/googletest/CMakeLists.txt")
7    message(FATAL_ERROR
8            "Cannot find third_party/googletest directory that's needed to "
9            "build tests. If you use git, make sure you have cloned submodules:\n"
10            "  git submodule update --init --recursive\n"
11            "If instead you want to skip tests, run cmake with:\n"
12            "  cmake -Dprotobuf_BUILD_TESTS=OFF\n")
13  endif()
14
15  set(googlemock_source_dir "${protobuf_SOURCE_DIR}/third_party/googletest/googlemock")
16  set(googletest_source_dir "${protobuf_SOURCE_DIR}/third_party/googletest/googletest")
17  include_directories(
18    ${googlemock_source_dir}
19    ${googletest_source_dir}
20    ${googletest_source_dir}/include
21    ${googlemock_source_dir}/include
22  )
23
24  add_library(gmock ${protobuf_SHARED_OR_STATIC}
25    "${googlemock_source_dir}/src/gmock-all.cc"
26    "${googletest_source_dir}/src/gtest-all.cc"
27  )
28  if (protobuf_BUILD_SHARED_LIBS)
29    set_target_properties(gmock
30      PROPERTIES
31        COMPILE_DEFINITIONS
32          "GTEST_CREATE_SHARED_LIBRARY=1"
33    )
34
35  endif()
36  if (protobuf_INSTALL)
37    set(protobuf_INSTALL_TESTS ON)
38  endif()
39
40  target_link_libraries(gmock ${CMAKE_THREAD_LIBS_INIT})
41  add_library(gmock_main STATIC "${googlemock_source_dir}/src/gmock_main.cc")
42  target_link_libraries(gmock_main gmock)
43
44  add_library(GTest::gmock ALIAS gmock)
45  add_library(GTest::gmock_main ALIAS gmock_main)
46  add_library(GTest::gtest ALIAS gmock)
47  add_library(GTest::gtest_main ALIAS gmock_main)
48endif()
49