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" ${flag_var} "${${flag_var}}")
45 # Defines the compiler/linker flags used to build Google Test and
46 # Google Mock. You can tweak these definitions to suit your need. A
47 # variable's value is empty before it's explicitly assigned to.
48 macro(config_compiler_and_linker)
49 if (NOT gtest_disable_pthreads)
50 # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
54 fix_default_compiler_settings_()
56 # Newlines inside flags variables break CMake's NMake generator.
57 # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
58 set(cxx_base_flags "-GS -W4 -WX -wd4127 -wd4251 -wd4275 -nologo -J -Zi")
59 set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
60 set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
61 set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
62 set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")
63 set(cxx_no_rtti_flags "-GR-")
64 elseif (CMAKE_COMPILER_IS_GNUCXX)
65 set(cxx_base_flags "-Wall -Wshadow")
66 set(cxx_exception_flags "-fexceptions")
67 set(cxx_no_exception_flags "-fno-exceptions")
68 # Until version 4.3.2, GCC doesn't define a macro to indicate
69 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI
71 set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
72 set(cxx_strict_flags "-Wextra")
73 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
74 set(cxx_exception_flags "-features=except")
75 # Sun Pro doesn't provide macros to indicate whether exceptions and
76 # RTTI are enabled, so we define GTEST_HAS_* explicitly.
77 set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
78 set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
79 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
80 CMAKE_CXX_COMPILER_ID STREQUAL "XL")
81 # CMake 2.8 changes Visual Age's compiler ID to "XL".
82 set(cxx_exception_flags "-qeh")
83 set(cxx_no_exception_flags "-qnoeh")
84 # Until version 9.0, Visual Age doesn't define a macro to indicate
85 # whether RTTI is enabled. Therefore we define GTEST_HAS_RTTI
87 set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
88 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
89 set(cxx_base_flags "-AA -mt")
90 set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
91 set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
92 # RTTI can not be disabled in HP aCC compiler.
93 set(cxx_no_rtti_flags "")
96 if (CMAKE_USE_PTHREADS_INIT) # The pthreads library is available and allowed.
97 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1")
99 set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0")
102 # For building gtest's own tests and samples.
103 set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}")
105 "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
106 set(cxx_default "${cxx_exception}")
107 set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
108 set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")
110 # For building the gtest libraries.
111 set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
114 # Defines the gtest & gtest_main libraries. User tests should link
116 function(cxx_library_with_type name type cxx_flags)
117 # type can be either STATIC or SHARED to denote a static or shared library.
118 # ARGN refers to additional arguments after 'cxx_flags'.
119 add_library(${name} ${type} ${ARGN})
120 set_target_properties(${name}
122 COMPILE_FLAGS "${cxx_flags}")
123 if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
124 set_target_properties(${name}
126 COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
128 if (CMAKE_USE_PTHREADS_INIT)
129 target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT})
133 ########################################################################
135 # Helper functions for creating build targets.
137 function(cxx_shared_library name cxx_flags)
138 cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
141 function(cxx_library name cxx_flags)
142 cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
145 # cxx_executable_with_flags(name cxx_flags libs srcs...)
147 # creates a named C++ executable that depends on the given libraries and
148 # is built from the given source files with the given compiler flags.
149 function(cxx_executable_with_flags name cxx_flags libs)
150 add_executable(${name} ${ARGN})
152 set_target_properties(${name}
154 COMPILE_FLAGS "${cxx_flags}")
156 if (BUILD_SHARED_LIBS)
157 set_target_properties(${name}
159 COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
161 # To support mixing linking in static and dynamic libraries, link each
162 # library in with an extra call to target_link_libraries.
163 foreach (lib "${libs}")
164 target_link_libraries(${name} ${lib})
168 # cxx_executable(name dir lib srcs...)
170 # creates a named target that depends on the given libs and is built
171 # from the given source files. dir/name.cc is implicitly included in
172 # the source file list.
173 function(cxx_executable name dir libs)
174 cxx_executable_with_flags(
175 ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
178 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
179 find_package(PythonInterp)
181 # cxx_test_with_flags(name cxx_flags libs srcs...)
183 # creates a named C++ test that depends on the given libs and is built
184 # from the given source files with the given compiler flags.
185 function(cxx_test_with_flags name cxx_flags libs)
186 cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
187 add_test(${name} ${name})
190 # cxx_test(name libs srcs...)
192 # creates a named test target that depends on the given libs and is
193 # built from the given source files. Unlike cxx_test_with_flags,
194 # test/name.cc is already implicitly included in the source file list.
195 function(cxx_test name libs)
196 cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
197 "test/${name}.cc" ${ARGN})
202 # creates a Python test with the given name whose main module is in
203 # test/name.py. It does nothing if Python is not installed.
204 function(py_test name)
205 # We are not supporting Python tests on Linux yet as they consider
206 # all Linux environments to be google3 and try to use google3 features.
207 if (PYTHONINTERP_FOUND)
208 # ${CMAKE_BINARY_DIR} is known at configuration time, so we can
209 # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
210 # only at ctest runtime (by calling ctest -c <Configuration>), so
211 # we have to escape $ to delay variable substitution here.
213 ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
214 --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})