我正在使用CMake开发C / C ++应用程序。我想在我的项目中使用GTest进行单元测试。为此,我决定将GTest用作存储库中的git子模块。
我的目录层次结构如下:
/
--include
--lib
--GoogleTest
--src
--Tests
GoogleTest
中的lib
子目录包含其官方存储库中GTest的源代码。
但是我无法使用它来测试我的来源。我的存储库根目录中的CMakeLists.txt
文件如下:
OPTION (BUILD_UNIT_TESTS "Build unit tests" ON)
if (BUILD_UNIT_TESTS)
enable_testing ()
find_package (GTest REQUIRED)
add_subdirectory (Tests)
endif ()
但是我收到错误消息:
错误:找不到GTest(丢失:GTEST_LIBRARY GTEST_INCLUDE_DIR GTEST_MAIN_LIBRARY)
当我搜索此内容时,有许多与我相似的问题,但没有一个解决我的问题。而且他们的手册非常有限,没有正确说明其用法。
CMake能够成功构建目标GTest,但是当我尝试将其用作外部软件包时无法识别它。
答案 0 :(得分:1)
您不必手动下载Gtest git。只需将以下行添加到您的CMakeLists.txt
# -------- GOOGLE TEST ----------
# Download and unpack googletest at configure time
configure_file(CMakeLists.txt.in googletest-download/CMakeLists.txt)
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
RESULT_VARIABLE result
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
if(result)
message(FATAL_ERROR "CMake step for googletest failed: ${result}")
endif()
execute_process(COMMAND ${CMAKE_COMMAND} --build .
RESULT_VARIABLE result
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
if(result)
message(FATAL_ERROR "Build step for googletest failed: ${result}")
endif()
# Prevent overriding the parent project's compiler/linker
# settings on Windows
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
# Add googletest directly to our build. This defines
# the gtest and gtest_main targets.
add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
${CMAKE_CURRENT_BINARY_DIR}/googletest-build
EXCLUDE_FROM_ALL)
# The gtest/gtest_main targets carry header search path
# dependencies automatically when using CMake 2.8.11 or
# later. Otherwise we have to add them here ourselves.
if (CMAKE_VERSION VERSION_LESS 2.8.11)
include_directories("${gtest_SOURCE_DIR}/include")
endif()
# -------------------------------------------------------------------------
enable_testing()
include_directories("${gtest_SOURCE_DIR}/include")
并将以下行添加到您的CMakeLists.txt.in
文件所在的同一目录中的另一个名为CMakeLists.txt
的文件中
cmake_minimum_required(VERSION 2.8.2)
project(googletest-download NONE)
include(ExternalProject)
ExternalProject_Add(googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG release-1.10.0
SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
TEST_COMMAND ""
)
您添加到主CMakeList中的内容将以CMakeLists.txt.in
文件中指定的版本下载GTest和GMock git项目。然后它将构建它们,并将构建路径包括在您的主项目中。