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Diffstat (limited to 'cmake/internal_utils.cmake')
| -rw-r--r-- | cmake/internal_utils.cmake | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/cmake/internal_utils.cmake b/cmake/internal_utils.cmake new file mode 100644 index 0000000..93e6dbb --- /dev/null +++ b/cmake/internal_utils.cmake @@ -0,0 +1,242 @@ +# 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" ${flag_var} "${${flag_var}}") + endforeach() + endif() +endmacro() + +# Defines the compiler/linker flags used to build Google Test and +# Google Mock. You can tweak these definitions to suit your need. A +# variable's value is empty before it's explicitly assigned to. +macro(config_compiler_and_linker) + if (NOT gtest_disable_pthreads) + # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT. + find_package(Threads) + endif() + + fix_default_compiler_settings_() + if (MSVC) + # Newlines inside flags variables break CMake's NMake generator. + # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds. + set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi") + if (MSVC_VERSION LESS 1400) # 1400 is Visual Studio 2005 + # Suppress spurious warnings MSVC 7.1 sometimes issues. + # Forcing value to bool. + set(cxx_base_flags "${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") + 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() |