ceph/src/rapidjson/thirdparty/gtest/googletest/cmake/internal_utils.cmake

   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" ${flag_var} "${${flag_var}}")
  41     endforeach()
  42   endif()
  43 endmacro()
  44
  45 # Defines the compiler/linker flags used to build Google Test and
  46 # Google Mock.  You can tweak these definitions to suit your need.  A
  47 # variable's value is empty before it's explicitly assigned to.
  48 macro(config_compiler_and_linker)
  49   if (NOT gtest_disable_pthreads)
  50     # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
  51     find_package(Threads)
  52   endif()
  53
  54   fix_default_compiler_settings_()
  55   if (MSVC)
  56     # Newlines inside flags variables break CMake's NMake generator.
  57     # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
  58     set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
  59     if (MSVC_VERSION LESS 1400)  # 1400 is Visual Studio 2005
  60       # Suppress spurious warnings MSVC 7.1 sometimes issues.
  61       # Forcing value to bool.
  62       set(cxx_base_flags "${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")
  68     endif()
  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 "${cxx_base_flags} -wd4127")
  77     endif()
  78     if (NOT (MSVC_VERSION LESS 1700))  # 1700 is Visual Studio 2012.
  79       # Suppress "unreachable code" warning on VS 2012 and later.
  80       # http://stackoverflow.com/questions/3232669 explains the issue.
  81       set(cxx_base_flags "${cxx_base_flags} -wd4702")
  82     endif()
  83
  84     set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
  85     set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
  86     set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
  87     set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")
  88     set(cxx_no_rtti_flags "-GR-")
  89   elseif (CMAKE_COMPILER_IS_GNUCXX)
  90     set(cxx_base_flags "-Wall -Wshadow")
  91     set(cxx_exception_flags "-fexceptions")
  92     set(cxx_no_exception_flags "-fno-exceptions")
  93     # Until version 4.3.2, GCC doesn't define a macro to indicate
  94     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
  95     # explicitly.
  96     set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
  97     set(cxx_strict_flags
  98       "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
  99   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
 100     set(cxx_exception_flags "-features=except")
 101     # Sun Pro doesn't provide macros to indicate whether exceptions and
 102     # RTTI are enabled, so we define GTEST_HAS_* explicitly.
 103     set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
 104     set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
 105   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
 106       CMAKE_CXX_COMPILER_ID STREQUAL "XL")
 107     # CMake 2.8 changes Visual Age's compiler ID to "XL".
 108     set(cxx_exception_flags "-qeh")
 109     set(cxx_no_exception_flags "-qnoeh")
 110     # Until version 9.0, Visual Age doesn't define a macro to indicate
 111     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
 112     # explicitly.
 113     set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
 114   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
 115     set(cxx_base_flags "-AA -mt")
 116     set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
 117     set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
 118     # RTTI can not be disabled in HP aCC compiler.
 119     set(cxx_no_rtti_flags "")
 120   endif()
 121
 122   if (CMAKE_USE_PTHREADS_INIT)  # The pthreads library is available and allowed.
 123     set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1")
 124   else()
 125     set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0")
 126   endif()
 127
 128   # For building gtest's own tests and samples.
 129   set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}")
 130   set(cxx_no_exception
 131     "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
 132   set(cxx_default "${cxx_exception}")
 133   set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
 134   set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")
 135
 136   # For building the gtest libraries.
 137   set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
 138 endmacro()
 139
 140 # Defines the gtest & gtest_main libraries.  User tests should link
 141 # with one of them.
 142 function(cxx_library_with_type name type cxx_flags)
 143   # type can be either STATIC or SHARED to denote a static or shared library.
 144   # ARGN refers to additional arguments after 'cxx_flags'.
 145   add_library(${name} ${type} ${ARGN})
 146   set_target_properties(${name}
 147     PROPERTIES
 148     COMPILE_FLAGS "${cxx_flags}")
 149   if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
 150     set_target_properties(${name}
 151       PROPERTIES
 152       COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
 153   endif()
 154   if (CMAKE_USE_PTHREADS_INIT)
 155     target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT})
 156   endif()
 157 endfunction()
 158
 159 ########################################################################
 160 #
 161 # Helper functions for creating build targets.
 162
 163 function(cxx_shared_library name cxx_flags)
 164   cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
 165 endfunction()
 166
 167 function(cxx_library name cxx_flags)
 168   cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
 169 endfunction()
 170
 171 # cxx_executable_with_flags(name cxx_flags libs srcs...)
 172 #
 173 # creates a named C++ executable that depends on the given libraries and
 174 # is built from the given source files with the given compiler flags.
 175 function(cxx_executable_with_flags name cxx_flags libs)
 176   add_executable(${name} ${ARGN})
 177   if (cxx_flags)
 178     set_target_properties(${name}
 179       PROPERTIES
 180       COMPILE_FLAGS "${cxx_flags}")
 181   endif()
 182   if (BUILD_SHARED_LIBS)
 183     set_target_properties(${name}
 184       PROPERTIES
 185       COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
 186   endif()
 187   # To support mixing linking in static and dynamic libraries, link each
 188   # library in with an extra call to target_link_libraries.
 189   foreach (lib "${libs}")
 190     target_link_libraries(${name} ${lib})
 191   endforeach()
 192 endfunction()
 193
 194 # cxx_executable(name dir lib srcs...)
 195 #
 196 # creates a named target that depends on the given libs and is built
 197 # from the given source files.  dir/name.cc is implicitly included in
 198 # the source file list.
 199 function(cxx_executable name dir libs)
 200   cxx_executable_with_flags(
 201     ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
 202 endfunction()
 203
 204 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
 205 find_package(PythonInterp)
 206
 207 # cxx_test_with_flags(name cxx_flags libs srcs...)
 208 #
 209 # creates a named C++ test that depends on the given libs and is built
 210 # from the given source files with the given compiler flags.
 211 function(cxx_test_with_flags name cxx_flags libs)
 212   cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
 213   add_test(${name} ${name})
 214 endfunction()
 215
 216 # cxx_test(name libs srcs...)
 217 #
 218 # creates a named test target that depends on the given libs and is
 219 # built from the given source files.  Unlike cxx_test_with_flags,
 220 # test/name.cc is already implicitly included in the source file list.
 221 function(cxx_test name libs)
 222   cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
 223     "test/${name}.cc" ${ARGN})
 224 endfunction()
 225
 226 # py_test(name)
 227 #
 228 # creates a Python test with the given name whose main module is in
 229 # test/name.py.  It does nothing if Python is not installed.
 230 function(py_test name)
 231   # We are not supporting Python tests on Linux yet as they consider
 232   # all Linux environments to be google3 and try to use google3 features.
 233   if (PYTHONINTERP_FOUND)
 234     # ${CMAKE_BINARY_DIR} is known at configuration time, so we can
 235     # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
 236     # only at ctest runtime (by calling ctest -c <Configuration>), so
 237     # we have to escape $ to delay variable substitution here.
 238     add_test(${name}
 239       ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
 240           --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})
 241   endif()
 242 endfunction()