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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" ${flag_var} "${${flag_var}}")
endforeach()
endif()
endmacro()
# Defines the compiler/linker flags used to build Google Test and
# Google Mock. You can tweak these definitions to suit your need. A
# variable's value is empty before it's explicitly assigned to.
macro(config_compiler_and_linker)
if (NOT gtest_disable_pthreads AND NOT MINGW)
# Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
find_package(Threads)
endif()
fix_default_compiler_settings_()
if (MSVC)
# Newlines inside flags variables break CMake's NMake generator.
# TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
if (MSVC_VERSION LESS 1400) # 1400 is Visual Studio 2005
# Suppress spurious warnings MSVC 7.1 sometimes issues.
# Forcing value to bool.
set(cxx_base_flags "${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()
if (MSVC_VERSION LESS 1500) # 1500 is Visual Studio 2008
# Conditional expression is constant.
# When compiling with /W4, we get several instances of C4127
# (Conditional expression is constant). In our code, we disable that
# warning on a case-by-case basis. However, on Visual Studio 2005,
# the warning fires on std::list. Therefore on that compiler and earlier,
# we disable the warning project-wide.
set(cxx_base_flags "${cxx_base_flags} -wd4127")
endif()
if (NOT (MSVC_VERSION LESS 1700)) # 1700 is Visual Studio 2012.
# Suppress "unreachable code" warning on VS 2012 and later.
# http://stackoverflow.com/questions/3232669 explains the issue.
set(cxx_base_flags "${cxx_base_flags} -wd4702")
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 -fPIC")
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 MATCHES "Clang")
set(cxx_base_flags "-Wall -Wshadow -fPIC")
set(cxx_exception_flags "-fexceptions")
set(cxx_no_exception_flags "-fno-exceptions")
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()
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