gtest and cmake

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#stub

If you have a code, do you have a test of the code ?
This page describes how to add gtest using cmake at "build time". You don't need to "install" gtest
あなたの手元のコードにテストは書かれていますか？
このページではcmakeを使って、ビルド時にgtestを追加する方法を説明します。gtestのインストールは不要です

External Project
example of CMakeLists.txt

External Project†

in cmake, you may build some project/program/library using external project function from cmake
Also, you may download some library using cmake
Combining this, it will allow you to "download and build and link with your program" at "build time"

↑

example of CMakeLists.txt†

#geshi(cmake){{ cmake_minimum_required(VERSION 2.8) project(softwareFp16) set_property(GLOBAL PROPERTY USE_FOLDERS ON)

# detect the platform if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm.*|ARM.*)")

   set(ARM 1)

elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64)")

   set(AARCH64 1)

else ()

   set(X86 1)

endif()

if (X86)

   message(STATUS "detected x86 or x86_64 architecture")
   if (MSVC)
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX /wd4819 -D_VARIADIC_MAX=10 /MP")
   endif()
   set(INTRINSIC_SOURCES converter_x86.cpp)

elseif (AARCH64)

   message(STATUS "detected ARM 64bit architecture")
   set(INTRINSIC_SOURCES converter_arm.cpp)

elseif (ARM)

   message(STATUS "detected ARM architecture")
   if (UNIX)
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfp16-format=ieee")
   endif()
   set(INTRINSIC_SOURCES converter_arm.cpp)

endif() set(HALF_CONVERTER_FILES ${INTRINSIC_SOURCES} converter.cpp converter.hpp)

# gtest set(PACKAGE_ARCHIVE_DIR "${CMAKE_SOURCE_DIR}/packages") set(THIRDPARTY_INSTALL "${CMAKE_BINARY_DIR}/third-party") include(ExternalProject)

macro(check_and_download PROJECT_NAME FULL_URL MD5_HASH_VALUE)

   message(STATUS "Downloading ${PROJECT_NAME}")
   get_filename_component(EXTRACT_ARCHIVE_FILE ${FULL_URL} NAME)
   set(${PROJECT_NAME}_FULL_URL "${FULL_URL}")
   set(${PROJECT_NAME}_WORK_DIR "${PACKAGE_ARCHIVE_DIR}")
   set(${PROJECT_NAME}_ARCHIVE_FILE "${PACKAGE_ARCHIVE_DIR}/${EXTRACT_ARCHIVE_FILE}")
   set(${PROJECT_NAME}_UNPACK_DIR "${CMAKE_BINARY_DIR}/third-party/${PROJECT_NAME}-src")
   if(NOT EXISTS ${${PROJECT_NAME}_ARCHIVE_FILE})
   file(
       DOWNLOAD ${FULL_URL} ${${PROJECT_NAME}_ARCHIVE_FILE}
       EXPECTED_MD5 ${MD5_HASH_VALUE} 
   )
   file(MD5 "${${PROJECT_NAME}_ARCHIVE_FILE}" ${PROJECT_NAME}_DOWNLOADED_MD5)
   if(NOT ${${PROJECT_NAME}_DOWNLOADED_MD5} STREQUAL ${MD5_HASH_VALUE})
       message(
           FATAL_ERROR
           "${PROJECT_NAME} MD5 hash match error : ${${PROJECT_NAME}_DOWNLOADED_MD5} (expected: ${MD5_HASH_VALUE})"
       )
   endif(NOT ${${PROJECT_NAME}_DOWNLOADED_MD5} STREQUAL ${MD5_HASH_VALUE})
   endif()
   set(${PROJECT_NAME}_DOWNLOADED_FILE "${${PROJECT_NAME}_ARCHIVE_FILE}")

endmacro(check_and_download)

macro(check_and_add_as_external_project PROJECT_NAME FULL_URL MD5_HASH_VALUE)

   check_and_download(${PROJECT_NAME} ${FULL_URL} ${MD5_HASH_VALUE})
   ExternalProject_Add(${PROJECT_NAME}_ext
   URL         "${${PROJECT_NAME}_ARCHIVE_FILE}"
   URL_HASH    MD5=${MD5_HASH_VALUE}
   BINARY_DIR  "${THIRDPARTY_INSTALL}/${PROJECT_NAME}" 
   SOURCE_DIR  "${THIRDPARTY_INSTALL}/${PROJECT_NAME}-src" 
   CMAKE_ARGS  "${gtest_cmake_args}" 
   "-DCMAKE_INSTALL_PREFIX=${THIRDPARTY_INSTALL}" 
   ${ARGN}
   )
   SET_TARGET_PROPERTIES(${PROJECT_NAME}_ext PROPERTIES FOLDER "3rdparty")

endmacro(check_and_add_as_external_project)

# gtest check_and_add_as_external_project(gtest

   "https://github.com/google/googletest/archive/release-1.8.0.zip"
   "adfafc8512ab65fd3cf7955ef0100ff5"
   "-DBUILD_GMOCK=OFF"
   "-DBUILD_GTEST=ON"
   "-DCMAKE_DEBUG_POSTFIX=d"
   )

set(GTEST_INCLUDE_DIR "${THIRDPARTY_INSTALL}/include") set(GTEST_LIB_PATH "${THIRDPARTY_INSTALL}/lib") set(GTEST_LIBRARY_RELEASE "${GTEST_LIB_PATH}/gtest.lib") set(GTEST_MAIN_RELEASE "${GTEST_LIB_PATH}/gtest_main.lib") set(GTEST_LIBRARY_DEBUG "${GTEST_LIB_PATH}/gtestd.lib") set(GTEST_MAIN_DEBUG "${GTEST_LIB_PATH}/gtest_maind.lib") include_directories(${GTEST_INCLUDE_DIR}) find_package(Threads) }}

let's explain one by one
#geshi(cmake){{ include(ExternalProject) }}
- what ever you do, you'll need to include ExternalProject
- now you may use ExternalProject_add command

External Project†

example of CMakeLists.txt†

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