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 # Defines functions and macros useful for building Google Test and

 # Google Mock.

 #

 # Note:

 #

 # - This file will be run twice when building Google Mock (once via

 #   Google Test's CMakeLists.txt, and once via Google Mock's).

 #   Therefore it shouldn't have any side effects other than defining

 #   the functions and macros.

 #

 # - The functions/macros defined in this file may depend on Google

 #   Test and Google Mock's option() definitions, and thus must be

 #   called *after* the options have been defined.

 # Tweaks CMake's default compiler/linker settings to suit Google Test's needs.

 #

 # This must be a macro(), as inside a function string() can only

 # update variables in the function scope.

 macro(fix_default_compiler_settings_)

   if (MSVC)

     # For MSVC, CMake sets certain flags to defaults we want to override.

     # This replacement code is taken from sample in the CMake Wiki at

     # http://www.cmake.org/Wiki/CMake_FAQ#Dynamic_Replace.

     foreach (flag_var

              CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE

              CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)

       if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)

         # When Google Test is built as a shared library, it should also use

         # shared runtime libraries.  Otherwise, it may end up with multiple

         # copies of runtime library data in different modules, resulting in

         # hard-to-find crashes. When it is built as a static library, it is

         # preferable to use CRT as static libraries, as we don't have to rely

         # on CRT DLLs being available. CMake always defaults to using shared

         # CRT libraries, so we override that default here.

         string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")

       endif()

       # We prefer more strict warning checking for building Google Test.

       # Replaces /W3 with /W4 in defaults.

       string(REPLACE "/W3" "-W4" ${flag_var} "${${flag_var}}")

     endforeach()

   endif()

 endmacro()

 # Defines the compiler/linker flags used to build Google Test and

 # Google Mock.  You can tweak these definitions to suit your need.  A

 # variable's value is empty before it's explicitly assigned to.

 macro(config_compiler_and_linker)

   if (NOT gtest_disable_pthreads)

     # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.

     find_package(Threads)

   endif()

   fix_default_compiler_settings_()

   if (MSVC)

     # Newlines inside flags variables break CMake's NMake generator.

     # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.

     set(cxx_base_flags "-GS -W4 -WX -wd4127 -wd4251 -wd4275 -nologo -J -Zi")

     if (MSVC_VERSION LESS 1400)

       # Suppress spurious warnings MSVC 7.1 sometimes issues.

       # Forcing value to bool.

       set(cxx_base_flags "${cxx_base_flags} -wd4800")

       # Copy constructor and assignment operator could not be generated.

       set(cxx_base_flags "${cxx_base_flags} -wd4511 -wd4512")

       # Compatibility warnings not applicable to Google Test.

       # Resolved overload was found by argument-dependent lookup.

       set(cxx_base_flags "${cxx_base_flags} -wd4675")

     endif()

     set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")

     set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")

     set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")

     set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")

     set(cxx_no_rtti_flags "-GR-")

   elseif (CMAKE_COMPILER_IS_GNUCXX)

     set(cxx_base_flags "-Wall -Wshadow")

     set(cxx_exception_flags "-fexceptions")

     set(cxx_no_exception_flags "-fno-exceptions")

     # Until version 4.3.2, GCC doesn't define a macro to indicate

     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI

     # explicitly.

     set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")

     set(cxx_strict_flags

       "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")

   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")

     set(cxx_exception_flags "-features=except")

     # Sun Pro doesn't provide macros to indicate whether exceptions and

     # RTTI are enabled, so we define GTEST_HAS_* explicitly.

     set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")

     set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")

   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR

       CMAKE_CXX_COMPILER_ID STREQUAL "XL")

     # CMake 2.8 changes Visual Age's compiler ID to "XL".

     set(cxx_exception_flags "-qeh")

     set(cxx_no_exception_flags "-qnoeh")

     # Until version 9.0, Visual Age doesn't define a macro to indicate

     # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI

     # explicitly.

     set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")

   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")

     set(cxx_base_flags "-AA -mt")

     set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")

     set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")

     # RTTI can not be disabled in HP aCC compiler.

     set(cxx_no_rtti_flags "")

   endif()

   if (CMAKE_USE_PTHREADS_INIT)  # The pthreads library is available and allowed.

     set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1")

   else()

     set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0")

   endif()

   # For building gtest's own tests and samples.

   set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}")

   set(cxx_no_exception

     "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")

   set(cxx_default "${cxx_exception}")

   set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")

   set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")

   # For building the gtest libraries.

   set(cxx_strict "${cxx_default} ${cxx_strict_flags}")

 endmacro()

 # Defines the gtest & gtest_main libraries.  User tests should link

 # with one of them.

 function(cxx_library_with_type name type cxx_flags)

   # type can be either STATIC or SHARED to denote a static or shared library.

   # ARGN refers to additional arguments after 'cxx_flags'.

   add_library(${name} ${type} ${ARGN})

   set_target_properties(${name}

     PROPERTIES

     COMPILE_FLAGS "${cxx_flags}")

   if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")

     set_target_properties(${name}

       PROPERTIES

       COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")

   endif()

   if (CMAKE_USE_PTHREADS_INIT)

     target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT})

   endif()

 endfunction()

 ########################################################################

 #

 # Helper functions for creating build targets.

 function(cxx_shared_library name cxx_flags)

   cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})

 endfunction()

 function(cxx_library name cxx_flags)

   cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})

 endfunction()

 # cxx_executable_with_flags(name cxx_flags libs srcs...)

 #

 # creates a named C++ executable that depends on the given libraries and

 # is built from the given source files with the given compiler flags.

 function(cxx_executable_with_flags name cxx_flags libs)

   add_executable(${name} ${ARGN})

   if (cxx_flags)

     set_target_properties(${name}

       PROPERTIES

       COMPILE_FLAGS "${cxx_flags}")

   endif()

   if (BUILD_SHARED_LIBS)

     set_target_properties(${name}

       PROPERTIES

       COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")

   endif()

   # To support mixing linking in static and dynamic libraries, link each

   # library in with an extra call to target_link_libraries.

   foreach (lib "${libs}")

     target_link_libraries(${name} ${lib})

   endforeach()

 endfunction()

 # cxx_executable(name dir lib srcs...)

 #

 # creates a named target that depends on the given libs and is built

 # from the given source files.  dir/name.cc is implicitly included in

 # the source file list.

 function(cxx_executable name dir libs)

   cxx_executable_with_flags(

     ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})

 endfunction()

 # Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.

 find_package(PythonInterp)

 # cxx_test_with_flags(name cxx_flags libs srcs...)

 #

 # creates a named C++ test that depends on the given libs and is built

 # from the given source files with the given compiler flags.

 function(cxx_test_with_flags name cxx_flags libs)

   cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})

   add_test(${name} ${name})

 endfunction()

 # cxx_test(name libs srcs...)

 #

 # creates a named test target that depends on the given libs and is

 # built from the given source files.  Unlike cxx_test_with_flags,

 # test/name.cc is already implicitly included in the source file list.

 function(cxx_test name libs)

   cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"

     "test/${name}.cc" ${ARGN})

 endfunction()

 # py_test(name)

 #

 # creates a Python test with the given name whose main module is in

 # test/name.py.  It does nothing if Python is not installed.

 function(py_test name)

   # We are not supporting Python tests on Linux yet as they consider

   # all Linux environments to be google3 and try to use google3 features.

   if (PYTHONINTERP_FOUND)

     # ${CMAKE_BINARY_DIR} is known at configuration time, so we can

     # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known

     # only at ctest runtime (by calling ctest -c <Configuration>), so

     # we have to escape $ to delay variable substitution here.

     add_test(${name}

       ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py

           --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})

   endif()

 endfunction()