1 # Defines functions and macros useful for building Google Test and
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.
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.
15 # Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
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_)
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.
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}}")
38 # We prefer more strict warning checking for building Google Test.
39 # Replaces /W3 with /W4 in defaults.
40 string(REPLACE "/W3" "/W4" ${flag_var} "${${flag_var}}")
45 # Defines the compiler/linker flags used to build Google Test and
46 # Google Mock. You can tweak these definitions to suit your need. A
47 # variable's value is empty before it's explicitly assigned to.
48 macro(config_compiler_and_linker)
49 if (NOT gtest_disable_pthreads)
50 # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
54 fix_default_compiler_settings_()
56 # Newlines inside flags variables break CMake's NMake generator.
57 # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
58 set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
59 if (MSVC_VERSION LESS 1400) # 1400 is Visual Studio 2005
60 # Suppress spurious warnings MSVC 7.1 sometimes issues.
61 # Forcing value to bool.
62 set(cxx_base_flags "${cxx_base_flags} -wd4800")
63 # Copy constructor and assignment operator could not be generated.
64 set(cxx_base_flags "${cxx_base_flags} -wd4511 -wd4512")
65 # Compatibility warnings not applicable to Google Test.
66 # Resolved overload was found by argument-dependent lookup.
67 set(cxx_base_flags "${cxx_base_flags} -wd4675")
69 if (MSVC_VERSION LESS 1500) # 1500 is Visual Studio 2008
70 # Conditional expression is constant.
71 # When compiling with /W4, we get several instances of C4127
72 # (Conditional expression is constant). In our code, we disable that
73 # warning on a case-by-case basis. However, on Visual Studio 2005,
74 # the warning fires on std::list. Therefore on that compiler and earlier,
75 # we disable the warning project-wide.
76 set(cxx_base_flags "${cxx_base_flags} -wd4127")
78 if (NOT (MSVC_VERSION LESS 1700)) # 1700 is Visual Studio 2012.
79 # Suppress "unreachable code" warning on VS 2012 and later.
80 # http://stackoverflow.com/questions/3232669 explains the issue.
81 set(cxx_base_flags "${cxx_base_flags} -wd4702")
83 if (NOT (MSVC_VERSION GREATER 1900)) # 1900 is Visual Studio 2015
84 # BigObj required for tests.
85 set(cxx_base_flags "${cxx_base_flags} -bigobj")
88 set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
89 set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
90 set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
91 set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")
92 set(cxx_no_rtti_flags "-GR-")
93 elseif (CMAKE_COMPILER_IS_GNUCXX)
94 set(cxx_base_flags "-Wall -Wshadow")
95 set(cxx_exception_flags "-fexceptions")
96 set(cxx_no_exception_flags "-fno-exceptions")
97 # Until version 4.3.2, GCC doesn't define a macro to indicate
98 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI
100 set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
102 "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
103 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
104 set(cxx_exception_flags "-features=except")
105 # Sun Pro doesn't provide macros to indicate whether exceptions and
106 # RTTI are enabled, so we define GTEST_HAS_* explicitly.
107 set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
108 set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
109 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
110 CMAKE_CXX_COMPILER_ID STREQUAL "XL")
111 # CMake 2.8 changes Visual Age's compiler ID to "XL".
112 set(cxx_exception_flags "-qeh")
113 set(cxx_no_exception_flags "-qnoeh")
114 # Until version 9.0, Visual Age doesn't define a macro to indicate
115 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI
117 set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
118 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
119 set(cxx_base_flags "-AA -mt")
120 set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
121 set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
122 # RTTI can not be disabled in HP aCC compiler.
123 set(cxx_no_rtti_flags "")
126 if (CMAKE_USE_PTHREADS_INIT) # The pthreads library is available and allowed.
127 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1")
129 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0")
132 # For building gtest's own tests and samples.
133 set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}")
135 "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
136 set(cxx_default "${cxx_exception}")
137 set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
138 set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")
140 # For building the gtest libraries.
141 set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
144 # Defines the gtest & gtest_main libraries. User tests should link
146 function(cxx_library_with_type name type cxx_flags)
147 # type can be either STATIC or SHARED to denote a static or shared library.
148 # ARGN refers to additional arguments after 'cxx_flags'.
149 add_library(${name} ${type} ${ARGN})
150 set_target_properties(${name}
152 COMPILE_FLAGS "${cxx_flags}")
153 if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
154 set_target_properties(${name}
156 COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
158 if (CMAKE_USE_PTHREADS_INIT)
159 target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT})
163 ########################################################################
165 # Helper functions for creating build targets.
167 function(cxx_shared_library name cxx_flags)
168 cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
171 function(cxx_library name cxx_flags)
172 cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
175 # cxx_executable_with_flags(name cxx_flags libs srcs...)
177 # creates a named C++ executable that depends on the given libraries and
178 # is built from the given source files with the given compiler flags.
179 function(cxx_executable_with_flags name cxx_flags libs)
180 add_executable(${name} ${ARGN})
182 set_target_properties(${name}
184 COMPILE_FLAGS "${cxx_flags}")
186 if (BUILD_SHARED_LIBS)
187 set_target_properties(${name}
189 COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
191 # To support mixing linking in static and dynamic libraries, link each
192 # library in with an extra call to target_link_libraries.
193 foreach (lib "${libs}")
194 target_link_libraries(${name} ${lib})
198 # cxx_executable(name dir lib srcs...)
200 # creates a named target that depends on the given libs and is built
201 # from the given source files. dir/name.cc is implicitly included in
202 # the source file list.
203 function(cxx_executable name dir libs)
204 cxx_executable_with_flags(
205 ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
208 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
209 find_package(PythonInterp)
211 # cxx_test_with_flags(name cxx_flags libs srcs...)
213 # creates a named C++ test that depends on the given libs and is built
214 # from the given source files with the given compiler flags.
215 function(cxx_test_with_flags name cxx_flags libs)
216 cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
217 add_test(${name} ${name})
220 # cxx_test(name libs srcs...)
222 # creates a named test target that depends on the given libs and is
223 # built from the given source files. Unlike cxx_test_with_flags,
224 # test/name.cc is already implicitly included in the source file list.
225 function(cxx_test name libs)
226 cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
227 "test/${name}.cc" ${ARGN})
232 # creates a Python test with the given name whose main module is in
233 # test/name.py. It does nothing if Python is not installed.
234 function(py_test name)
235 # We are not supporting Python tests on Linux yet as they consider
236 # all Linux environments to be google3 and try to use google3 features.
237 if (PYTHONINTERP_FOUND)
238 # ${CMAKE_BINARY_DIR} is known at configuration time, so we can
239 # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
240 # only at ctest runtime (by calling ctest -c <Configuration>), so
241 # we have to escape $ to delay variable substitution here.
242 if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
245 COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
246 --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIGURATION>)
247 else (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)
250 ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
251 --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})
252 endif (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} GREATER 3.1)