1 files changed, 71 insertions, 0 deletions
diff --git a/src/dmclock/cmake/modules/BuildGTest.cmake b/src/dmclock/cmake/modules/BuildGTest.cmake
new file mode 100644
index 000000000..2b3f2ae52
--- /dev/null
+++ b/src/dmclock/cmake/modules/BuildGTest.cmake
@@ -0,0 +1,71 @@
+macro(_build_gtest gtest_root)
+  include(ExternalProject)
+  ExternalProject_Add(googletest
+    SOURCE_DIR ${gtest_root}
+    CMAKE_ARGS -DBUILD_GMOCK=OFF -DBUILD_GTEST=ON
+    INSTALL_COMMAND ""
+    LOG_CONFIGURE ON
+    LOG_BUILD ON)
+
+  ExternalProject_Get_Property(googletest source_dir)
+  find_path(GTEST_INCLUDE_DIRS
+    NAMES gtest/gtest.h
+    PATHS ${source_dir}/googletest/include /usr/include)
+  find_path(GMOCK_INCLUDE_DIRS
+    NAMES gmock/gmock.h
+    PATHS ${source_dir}/googlemock/include /usr/include)
+
+  find_package(Threads REQUIRED)
+
+  ExternalProject_Get_Property(googletest binary_dir)
+  set(GTEST_LIBRARY_PATH ${binary_dir}/${CMAKE_FIND_LIBRARY_PREFIXES}gtest.a)
+  set(GTEST_LIBRARY GTest::GTest)
+  add_library(${GTEST_LIBRARY} STATIC IMPORTED)
+  set_target_properties(${GTEST_LIBRARY} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIRS}"
+    IMPORTED_LOCATION ${GTEST_LIBRARY_PATH}
+    IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+    IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${GTEST_LIBRARY} googletest)
+  set(GTEST_LIBRARIES ${GTEST_LIBRARY})
+
+  set(GTEST_MAIN_LIBRARY_PATH ${binary_dir}/${CMAKE_FIND_LIBRARY_PREFIXES}gtest_main.a)
+  set(GTEST_MAIN_LIBRARY GTest::Main)
+  add_library(${GTEST_MAIN_LIBRARY} STATIC IMPORTED)
+  set_target_properties(${GTEST_MAIN_LIBRARY} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIRS}"
+    IMPORTED_LOCATION ${GTEST_MAIN_LIBRARY_PATH}
+    IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${GTEST_MAIN_LIBRARY} googletest)
+
+  set(GMOCK_LIBRARY_PATH ${binary_dir}/${CMAKE_FIND_LIBRARY_PREFIXES}gmock.a)
+  set(GMOCK_LIBRARY GMock::GMock)
+  add_library(${GMOCK_LIBRARY} STATIC IMPORTED)
+  set_target_properties(${GMOCK_LIBRARY} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${GMOCK_INCLUDE_DIRS}"
+    IMPORTED_LOCATION "${GMOCK_LIBRARY_PATH}"
+    IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+    IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${GMOCK_LIBRARY} googletest)
+
+  set(GMOCK_MAIN_LIBRARY_PATH ${binary_dir}/${CMAKE_FIND_LIBRARY_PREFIXES}gmock_main.a)
+  set(GMOCK_MAIN_LIBRARY GMock::Main)
+  add_library(${GMOCK_MAIN_LIBRARY} STATIC IMPORTED)
+  set_target_properties(${GMOCK_MAIN_LIBRARY} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${GMOCK_INCLUDE_DIRS}"
+    IMPORTED_LOCATION ${GMOCK_MAIN_LIBRARY_PATH}
+    IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+    IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+  add_dependencies(${GMOCK_MAIN_LIBRARY} ${GTEST_LIBRARY})
+endmacro()
+
+find_path(GTEST_ROOT src/gtest.cc
+  HINTS $ENV{GTEST_ROOT}
+  PATHS /usr/src/googletest/googletest /usr/src/gtest)
+
+if(EXISTS ${GTEST_ROOT})
+  message(STATUS "Found googletest: ${GTEST_ROOT}")
+  _build_gtest(${GTEST_ROOT})
+else()
+  message(SEND_ERROR "Could NOT find googletest")
+endif()