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 # http://www.cmake.org/Wiki/CMake_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" ${flag_var} "${${flag_var}}") 41 endforeach() 42 endif() 43 endmacro() 44 45 # Defines the compiler/linker flags used to build Google Test and 46 # Google Mock. You can tweak these definitions to suit your need. A 47 # variable's value is empty before it's explicitly assigned to. 48 macro(config_compiler_and_linker) 49 if (NOT gtest_disable_pthreads) 50 # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT. 51 find_package(Threads) 52 endif() 53 54 fix_default_compiler_settings_() 55 if (MSVC) 56 # Newlines inside flags variables break CMake's NMake generator. 57 # TODO(vladl (a] google.com): Add -RTCs and -RTCu to debug builds. 58 set(cxx_base_flags "-GS -W4 -WX -wd4127 -wd4251 -wd4275 -nologo -J -Zi") 59 set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32") 60 set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN") 61 set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1") 62 set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0") 63 set(cxx_no_rtti_flags "-GR-") 64 elseif (CMAKE_COMPILER_IS_GNUCXX) 65 set(cxx_base_flags "-Wall -Wshadow") 66 set(cxx_exception_flags "-fexceptions") 67 set(cxx_no_exception_flags "-fno-exceptions") 68 # Until version 4.3.2, GCC doesn't define a macro to indicate 69 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI 70 # explicitly. 71 set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0") 72 set(cxx_strict_flags "-Wextra") 73 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro") 74 set(cxx_exception_flags "-features=except") 75 # Sun Pro doesn't provide macros to indicate whether exceptions and 76 # RTTI are enabled, so we define GTEST_HAS_* explicitly. 77 set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0") 78 set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0") 79 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR 80 CMAKE_CXX_COMPILER_ID STREQUAL "XL") 81 # CMake 2.8 changes Visual Age's compiler ID to "XL". 82 set(cxx_exception_flags "-qeh") 83 set(cxx_no_exception_flags "-qnoeh") 84 # Until version 9.0, Visual Age doesn't define a macro to indicate 85 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI 86 # explicitly. 87 set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0") 88 endif() 89 90 if (CMAKE_USE_PTHREADS_INIT) # The pthreads library is available and allowed. 91 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1") 92 else() 93 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0") 94 endif() 95 96 # For building gtest's own tests and samples. 97 set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}") 98 set(cxx_no_exception 99 "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}") 100 set(cxx_default "${cxx_exception}") 101 set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}") 102 set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1") 103 104 # For building the gtest libraries. 105 set(cxx_strict "${cxx_default} ${cxx_strict_flags}") 106 endmacro() 107 108 # Defines the gtest & gtest_main libraries. User tests should link 109 # with one of them. 110 function(cxx_library_with_type name type cxx_flags) 111 # type can be either STATIC or SHARED to denote a static or shared library. 112 # ARGN refers to additional arguments after 'cxx_flags'. 113 add_library(${name} ${type} ${ARGN}) 114 set_target_properties(${name} 115 PROPERTIES 116 COMPILE_FLAGS "${cxx_flags}") 117 if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED") 118 set_target_properties(${name} 119 PROPERTIES 120 COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1") 121 endif() 122 if (CMAKE_USE_PTHREADS_INIT) 123 target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT}) 124 endif() 125 endfunction() 126 127 ######################################################################## 128 # 129 # Helper functions for creating build targets. 130 131 function(cxx_shared_library name cxx_flags) 132 cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN}) 133 endfunction() 134 135 function(cxx_library name cxx_flags) 136 cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN}) 137 endfunction() 138 139 # cxx_executable_with_flags(name cxx_flags libs srcs...) 140 # 141 # creates a named C++ executable that depends on the given libraries and 142 # is built from the given source files with the given compiler flags. 143 function(cxx_executable_with_flags name cxx_flags libs) 144 add_executable(${name} ${ARGN}) 145 if (cxx_flags) 146 set_target_properties(${name} 147 PROPERTIES 148 COMPILE_FLAGS "${cxx_flags}") 149 endif() 150 if (BUILD_SHARED_LIBS) 151 set_target_properties(${name} 152 PROPERTIES 153 COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1") 154 endif() 155 # To support mixing linking in static and dynamic libraries, link each 156 # library in with an extra call to target_link_libraries. 157 foreach (lib "${libs}") 158 target_link_libraries(${name} ${lib}) 159 endforeach() 160 endfunction() 161 162 # cxx_executable(name dir lib srcs...) 163 # 164 # creates a named target that depends on the given libs and is built 165 # from the given source files. dir/name.cc is implicitly included in 166 # the source file list. 167 function(cxx_executable name dir libs) 168 cxx_executable_with_flags( 169 ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN}) 170 endfunction() 171 172 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE. 173 find_package(PythonInterp) 174 175 # cxx_test_with_flags(name cxx_flags libs srcs...) 176 # 177 # creates a named C++ test that depends on the given libs and is built 178 # from the given source files with the given compiler flags. 179 function(cxx_test_with_flags name cxx_flags libs) 180 cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN}) 181 add_test(${name} ${name}) 182 endfunction() 183 184 # cxx_test(name libs srcs...) 185 # 186 # creates a named test target that depends on the given libs and is 187 # built from the given source files. Unlike cxx_test_with_flags, 188 # test/name.cc is already implicitly included in the source file list. 189 function(cxx_test name libs) 190 cxx_test_with_flags("${name}" "${cxx_default}" "${libs}" 191 "test/${name}.cc" ${ARGN}) 192 endfunction() 193 194 # py_test(name) 195 # 196 # creates a Python test with the given name whose main module is in 197 # test/name.py. It does nothing if Python is not installed. 198 function(py_test name) 199 # We are not supporting Python tests on Linux yet as they consider 200 # all Linux environments to be google3 and try to use google3 features. 201 if (PYTHONINTERP_FOUND) 202 # ${CMAKE_BINARY_DIR} is known at configuration time, so we can 203 # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known 204 # only at ctest runtime (by calling ctest -c <Configuration>), so 205 # we have to escape $ to delay variable substitution here. 206 add_test(${name} 207 ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py 208 --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE}) 209 endif() 210 endfunction() 211
