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  1. # Defines functions and macros useful for building Google Test and
  2. # Google Mock.
  3. #
  4. # Note:
  5. #
  6. # - This file will be run twice when building Google Mock (once via
  7. #   Google Test's CMakeLists.txt, and once via Google Mock's).
  8. #   Therefore it shouldn't have any side effects other than defining
  9. #   the functions and macros.
  10. #
  11. # - The functions/macros defined in this file may depend on Google
  12. #   Test and Google Mock's option() definitions, and thus must be
  13. #   called *after* the options have been defined.
  14.  
  15. # Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
  16. #
  17. # This must be a macro(), as inside a function string() can only
  18. # update variables in the function scope.
  19. macro(fix_default_compiler_settings_)
  20.   if (MSVC)
  21.     # For MSVC, CMake sets certain flags to defaults we want to override.
  22.     # This replacement code is taken from sample in the CMake Wiki at
  23.     # https://gitlab.kitware.com/cmake/community/wikis/FAQ#dynamic-replace.
  24.     foreach (flag_var
  25.              CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
  26.              CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
  27.       if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
  28.         # When Google Test is built as a shared library, it should also use
  29.         # shared runtime libraries.  Otherwise, it may end up with multiple
  30.         # copies of runtime library data in different modules, resulting in
  31.         # hard-to-find crashes. When it is built as a static library, it is
  32.         # preferable to use CRT as static libraries, as we don't have to rely
  33.         # on CRT DLLs being available. CMake always defaults to using shared
  34.         # CRT libraries, so we override that default here.
  35.         string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
  36.       endif()
  37.  
  38.       # We prefer more strict warning checking for building Google Test.
  39.       # Replaces /W3 with /W4 in defaults.
  40.       string(REPLACE "/W3" "/W4" ${flag_var} "${${flag_var}}")
  41.  
  42.       # Prevent D9025 warning for targets that have exception handling
  43.       # turned off (/EHs-c- flag). Where required, exceptions are explicitly
  44.       # re-enabled using the cxx_exception_flags variable.
  45.       string(REPLACE "/EHsc" "" ${flag_var} "${${flag_var}}")
  46.     endforeach()
  47.   endif()
  48. endmacro()
  49.  
  50. # Defines the compiler/linker flags used to build Google Test and
  51. # Google Mock.  You can tweak these definitions to suit your need.  A
  52. # variable's value is empty before it's explicitly assigned to.
  53. macro(config_compiler_and_linker)
  54.   # Note: pthreads on MinGW is not supported, even if available
  55.   # instead, we use windows threading primitives
  56.   unset(GTEST_HAS_PTHREAD)
  57.   if (NOT gtest_disable_pthreads AND NOT MINGW)
  58.     # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
  59.     set(THREADS_PREFER_PTHREAD_FLAG ON)
  60.     find_package(Threads)
  61.     if (CMAKE_USE_PTHREADS_INIT)
  62.       set(GTEST_HAS_PTHREAD ON)
  63.     endif()
  64.   endif()
  65.  
  66.   fix_default_compiler_settings_()
  67.   if (MSVC)
  68.     # Newlines inside flags variables break CMake's NMake generator.
  69.     # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
  70.     set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
  71.     if (MSVC_VERSION LESS 1400)  # 1400 is Visual Studio 2005
  72.       # Suppress spurious warnings MSVC 7.1 sometimes issues.
  73.       # Forcing value to bool.
  74.       set(cxx_base_flags "${cxx_base_flags} -wd4800")
  75.       # Copy constructor and assignment operator could not be generated.
  76.       set(cxx_base_flags "${cxx_base_flags} -wd4511 -wd4512")
  77.       # Compatibility warnings not applicable to Google Test.
  78.       # Resolved overload was found by argument-dependent lookup.
  79.       set(cxx_base_flags "${cxx_base_flags} -wd4675")
  80.     endif()
  81.     if (MSVC_VERSION LESS 1500)  # 1500 is Visual Studio 2008
  82.       # Conditional expression is constant.
  83.       # When compiling with /W4, we get several instances of C4127
  84.       # (Conditional expression is constant). In our code, we disable that
  85.       # warning on a case-by-case basis. However, on Visual Studio 2005,
  86.       # the warning fires on std::list. Therefore on that compiler and earlier,
  87.       # we disable the warning project-wide.
  88.       set(cxx_base_flags "${cxx_base_flags} -wd4127")
  89.     endif()
  90.     if (NOT (MSVC_VERSION LESS 1700))  # 1700 is Visual Studio 2012.
  91.       # Suppress "unreachable code" warning on VS 2012 and later.
  92.       # http://stackoverflow.com/questions/3232669 explains the issue.
  93.       set(cxx_base_flags "${cxx_base_flags} -wd4702")
  94.     endif()
  95.  
  96.     set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
  97.     set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
  98.     set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
  99.     set(cxx_no_exception_flags "-EHs-c- -D_HAS_EXCEPTIONS=0")
  100.     set(cxx_no_rtti_flags "-GR-")
  101.   elseif (CMAKE_COMPILER_IS_GNUCXX)
  102.     set(cxx_base_flags "-Wall -Wshadow -Werror")
  103.     if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
  104.       set(cxx_base_flags "${cxx_base_flags} -Wno-error=dangling-else")
  105.     endif()
  106.     set(cxx_exception_flags "-fexceptions")
  107.     set(cxx_no_exception_flags "-fno-exceptions")
  108.     # Until version 4.3.2, GCC doesn't define a macro to indicate
  109.     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
  110.     # explicitly.
  111.     set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
  112.     set(cxx_strict_flags
  113.       "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
  114.   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
  115.     set(cxx_exception_flags "-features=except")
  116.     # Sun Pro doesn't provide macros to indicate whether exceptions and
  117.     # RTTI are enabled, so we define GTEST_HAS_* explicitly.
  118.     set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
  119.     set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
  120.   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
  121.       CMAKE_CXX_COMPILER_ID STREQUAL "XL")
  122.     # CMake 2.8 changes Visual Age's compiler ID to "XL".
  123.     set(cxx_exception_flags "-qeh")
  124.     set(cxx_no_exception_flags "-qnoeh")
  125.     # Until version 9.0, Visual Age doesn't define a macro to indicate
  126.     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
  127.     # explicitly.
  128.     set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
  129.   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
  130.     set(cxx_base_flags "-AA -mt")
  131.     set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
  132.     set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
  133.     # RTTI can not be disabled in HP aCC compiler.
  134.     set(cxx_no_rtti_flags "")
  135.   endif()
  136.  
  137.   # The pthreads library is available and allowed?
  138.   if (DEFINED GTEST_HAS_PTHREAD)
  139.     set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=1")
  140.   else()
  141.     set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=0")
  142.   endif()
  143.   set(cxx_base_flags "${cxx_base_flags} ${GTEST_HAS_PTHREAD_MACRO}")
  144.  
  145.   # For building gtest's own tests and samples.
  146.   set(cxx_exception "${cxx_base_flags} ${cxx_exception_flags}")
  147.   set(cxx_no_exception
  148.     "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
  149.   set(cxx_default "${cxx_exception}")
  150.   set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
  151.   set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")
  152.  
  153.   # For building the gtest libraries.
  154.   set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
  155. endmacro()
  156.  
  157. # Defines the gtest & gtest_main libraries.  User tests should link
  158. # with one of them.
  159. function(cxx_library_with_type name type cxx_flags)
  160.   # type can be either STATIC or SHARED to denote a static or shared library.
  161.   # ARGN refers to additional arguments after 'cxx_flags'.
  162.   add_library(${name} ${type} ${ARGN})
  163.   set_target_properties(${name}
  164.     PROPERTIES
  165.     COMPILE_FLAGS "${cxx_flags}")
  166.   # Generate debug library name with a postfix.
  167.   set_target_properties(${name}
  168.     PROPERTIES
  169.     DEBUG_POSTFIX "d")
  170.   if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
  171.     set_target_properties(${name}
  172.       PROPERTIES
  173.       COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
  174.     if (NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
  175.       target_compile_definitions(${name} INTERFACE
  176.         $<INSTALL_INTERFACE:GTEST_LINKED_AS_SHARED_LIBRARY=1>)
  177.     endif()
  178.   endif()
  179.   if (DEFINED GTEST_HAS_PTHREAD)
  180.     if ("${CMAKE_VERSION}" VERSION_LESS "3.1.0")
  181.       set(threads_spec ${CMAKE_THREAD_LIBS_INIT})
  182.     else()
  183.       set(threads_spec Threads::Threads)
  184.     endif()
  185.     target_link_libraries(${name} PUBLIC ${threads_spec})
  186.   endif()
  187. endfunction()
  188.  
  189. ########################################################################
  190. #
  191. # Helper functions for creating build targets.
  192.  
  193. function(cxx_shared_library name cxx_flags)
  194.   cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
  195. endfunction()
  196.  
  197. function(cxx_library name cxx_flags)
  198.   cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
  199. endfunction()
  200.  
  201. # cxx_executable_with_flags(name cxx_flags libs srcs...)
  202. #
  203. # creates a named C++ executable that depends on the given libraries and
  204. # is built from the given source files with the given compiler flags.
  205. function(cxx_executable_with_flags name cxx_flags libs)
  206.   add_executable(${name} ${ARGN})
  207.   if (MSVC AND (NOT (MSVC_VERSION LESS 1700)))  # 1700 is Visual Studio 2012.
  208.     # BigObj required for tests.
  209.     set(cxx_flags "${cxx_flags} -bigobj")
  210.   endif()
  211.   if (cxx_flags)
  212.     set_target_properties(${name}
  213.       PROPERTIES
  214.       COMPILE_FLAGS "${cxx_flags}")
  215.   endif()
  216.   if (BUILD_SHARED_LIBS)
  217.     set_target_properties(${name}
  218.       PROPERTIES
  219.       COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
  220.   endif()
  221.   # To support mixing linking in static and dynamic libraries, link each
  222.   # library in with an extra call to target_link_libraries.
  223.   foreach (lib "${libs}")
  224.     target_link_libraries(${name} ${lib})
  225.   endforeach()
  226. endfunction()
  227.  
  228. # cxx_executable(name dir lib srcs...)
  229. #
  230. # creates a named target that depends on the given libs and is built
  231. # from the given source files.  dir/name.cc is implicitly included in
  232. # the source file list.
  233. function(cxx_executable name dir libs)
  234.   cxx_executable_with_flags(
  235.     ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
  236. endfunction()
  237.  
  238. # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
  239. find_package(PythonInterp)
  240.  
  241. # cxx_test_with_flags(name cxx_flags libs srcs...)
  242. #
  243. # creates a named C++ test that depends on the given libs and is built
  244. # from the given source files with the given compiler flags.
  245. function(cxx_test_with_flags name cxx_flags libs)
  246.   cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
  247.   add_test(NAME ${name} COMMAND ${name})
  248. endfunction()
  249.  
  250. # cxx_test(name libs srcs...)
  251. #
  252. # creates a named test target that depends on the given libs and is
  253. # built from the given source files.  Unlike cxx_test_with_flags,
  254. # test/name.cc is already implicitly included in the source file list.
  255. function(cxx_test name libs)
  256.   cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
  257.     "test/${name}.cc" ${ARGN})
  258. endfunction()
  259.  
  260. # py_test(name)
  261. #
  262. # creates a Python test with the given name whose main module is in
  263. # test/name.py.  It does nothing if Python is not installed.
  264. function(py_test name)
  265.   if (PYTHONINTERP_FOUND)
  266.     if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
  267.       if (CMAKE_CONFIGURATION_TYPES)
  268.         # Multi-configuration build generators as for Visual Studio save
  269.         # output in a subdirectory of CMAKE_CURRENT_BINARY_DIR (Debug,
  270.         # Release etc.), so we have to provide it here.
  271.         add_test(
  272.           NAME ${name}
  273.           COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
  274.               --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
  275.       else (CMAKE_CONFIGURATION_TYPES)
  276.         # Single-configuration build generators like Makefile generators
  277.         # don't have subdirs below CMAKE_CURRENT_BINARY_DIR.
  278.         add_test(
  279.           NAME ${name}
  280.           COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
  281.               --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
  282.       endif (CMAKE_CONFIGURATION_TYPES)
  283.     else (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
  284.       # ${CMAKE_CURRENT_BINARY_DIR} is known at configuration time, so we can
  285.       # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
  286.       # only at ctest runtime (by calling ctest -c <Configuration>), so
  287.       # we have to escape $ to delay variable substitution here.
  288.       add_test(
  289.         ${name}
  290.         ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
  291.           --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
  292.     endif (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
  293.   endif(PYTHONINTERP_FOUND)
  294. endfunction()
  295.  
  296. # install_project(targets...)
  297. #
  298. # Installs the specified targets and configures the associated pkgconfig files.
  299. function(install_project)
  300.   if(INSTALL_GTEST)
  301.     install(DIRECTORY "${PROJECT_SOURCE_DIR}/include/"
  302.       DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
  303.     # Install the project targets.
  304.     install(TARGETS ${ARGN}
  305.       EXPORT ${targets_export_name}
  306.       RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
  307.       ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
  308.       LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
  309.     # Configure and install pkgconfig files.
  310.     foreach(t ${ARGN})
  311.       set(configured_pc "${generated_dir}/${t}.pc")
  312.       configure_file("${PROJECT_SOURCE_DIR}/cmake/${t}.pc.in"
  313.         "${configured_pc}" @ONLY)
  314.       install(FILES "${configured_pc}"
  315.         DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
  316.     endforeach()
  317.   endif()
  318. endfunction()
  319.