mirror of
https://github.com/google/benchmark.git
synced 2025-01-16 06:40:13 +08:00
7db02be244
* Add support for GTest based unit tests. As Dominic and I have previously discussed, there is some need/desire to improve the testing situation in Google Benchmark. One step to fixing this problem is to make it easier to write unit tests by adding support for GTest, which is what this patch does. By default it looks for an installed version of GTest. However the user can specify -DBENCHMARK_BUILD_EXTERNAL_GTEST=ON to instead download, build, and use copy of gtest from source. This is quite useful when Benchmark is being built in non-standard configurations, such as against libc++ or in 32 bit mode.
214 lines
8.6 KiB
CMake
214 lines
8.6 KiB
CMake
cmake_minimum_required (VERSION 2.8.12)
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project (benchmark)
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foreach(p
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CMP0054 # CMake 3.1
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CMP0056 # export EXE_LINKER_FLAGS to try_run
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CMP0057 # Support no if() IN_LIST operator
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)
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if(POLICY ${p})
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cmake_policy(SET ${p} NEW)
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endif()
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endforeach()
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option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
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option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
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option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
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option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
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option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
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option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
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# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
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# may require downloading the source code.
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option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
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# This option can be used to disable building and running unit tests which depend on gtest
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# in cases where it is not possible to build or find a valid version of gtest.
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option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
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# Make sure we can import out CMake functions
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
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# Read the git tags to determine the project version
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include(GetGitVersion)
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get_git_version(GIT_VERSION)
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# Tell the user what versions we are using
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string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})
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message("-- Version: ${VERSION}")
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# The version of the libraries
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set(GENERIC_LIB_VERSION ${VERSION})
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string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
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# Import our CMake modules
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include(CheckCXXCompilerFlag)
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include(AddCXXCompilerFlag)
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include(CXXFeatureCheck)
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if (BENCHMARK_BUILD_32_BITS)
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add_required_cxx_compiler_flag(-m32)
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endif()
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if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
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# Turn compiler warnings up to 11
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string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
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add_definitions(-D_CRT_SECURE_NO_WARNINGS)
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if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
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add_cxx_compiler_flag(-EHs-)
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add_cxx_compiler_flag(-EHa-)
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endif()
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# Link time optimisation
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if (BENCHMARK_ENABLE_LTO)
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set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
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set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
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set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
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set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
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set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
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string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
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set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
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string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
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set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
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string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
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set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
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set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
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set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
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set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
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set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
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endif()
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else()
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# Try and enable C++11. Don't use C++14 because it doesn't work in some
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# configurations.
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add_cxx_compiler_flag(-std=c++11)
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if (NOT HAVE_CXX_FLAG_STD_CXX11)
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add_cxx_compiler_flag(-std=c++0x)
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endif()
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# Turn compiler warnings up to 11
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add_cxx_compiler_flag(-Wall)
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add_cxx_compiler_flag(-Wextra)
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add_cxx_compiler_flag(-Wshadow)
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add_cxx_compiler_flag(-Werror RELEASE)
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add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
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add_cxx_compiler_flag(-Werror MINSIZEREL)
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add_cxx_compiler_flag(-pedantic)
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add_cxx_compiler_flag(-pedantic-errors)
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add_cxx_compiler_flag(-Wshorten-64-to-32)
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add_cxx_compiler_flag(-Wfloat-equal)
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add_cxx_compiler_flag(-fstrict-aliasing)
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if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
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add_cxx_compiler_flag(-fno-exceptions)
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endif()
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if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
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if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
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add_cxx_compiler_flag(-Wstrict-aliasing)
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endif()
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endif()
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# ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
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# (because of deprecated overload)
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add_cxx_compiler_flag(-wd654)
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add_cxx_compiler_flag(-Wthread-safety)
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if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
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cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
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endif()
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# On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
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# predefined macro, which turns on all of the wonderful libc extensions.
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# However g++ doesn't do this in Cygwin so we have to define it ourselfs
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# since we depend on GNU/POSIX/BSD extensions.
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if (CYGWIN)
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add_definitions(-D_GNU_SOURCE=1)
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endif()
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# Link time optimisation
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if (BENCHMARK_ENABLE_LTO)
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add_cxx_compiler_flag(-flto)
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if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
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find_program(GCC_AR gcc-ar)
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if (GCC_AR)
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set(CMAKE_AR ${GCC_AR})
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endif()
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find_program(GCC_RANLIB gcc-ranlib)
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if (GCC_RANLIB)
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set(CMAKE_RANLIB ${GCC_RANLIB})
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endif()
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elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
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include(llvm-toolchain)
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endif()
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endif()
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# Coverage build type
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set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
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CACHE STRING "Flags used by the C++ compiler during coverage builds."
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FORCE)
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set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
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CACHE STRING "Flags used for linking binaries during coverage builds."
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FORCE)
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set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
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CACHE STRING "Flags used by the shared libraries linker during coverage builds."
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FORCE)
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mark_as_advanced(
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BENCHMARK_CXX_FLAGS_COVERAGE
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BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
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BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
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set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
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"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
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add_cxx_compiler_flag(--coverage COVERAGE)
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endif()
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if (BENCHMARK_USE_LIBCXX)
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if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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add_cxx_compiler_flag(-stdlib=libc++)
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elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
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"${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
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add_cxx_compiler_flag(-nostdinc++)
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message("libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
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# Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
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# configuration checks such as 'find_package(Threads)'
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list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
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# -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
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# linker flags appear before all linker inputs and -lc++ must appear after.
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list(APPEND BENCHMARK_CXX_LIBRARIES c++)
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else()
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message(FATAL "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
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endif()
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endif(BENCHMARK_USE_LIBCXX)
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# C++ feature checks
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# Determine the correct regular expression engine to use
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cxx_feature_check(STD_REGEX)
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cxx_feature_check(GNU_POSIX_REGEX)
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cxx_feature_check(POSIX_REGEX)
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if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
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message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
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endif()
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if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
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AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
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message(WARNING "Using std::regex with exceptions disabled is not fully supported")
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endif()
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cxx_feature_check(STEADY_CLOCK)
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# Ensure we have pthreads
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find_package(Threads REQUIRED)
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# Set up directories
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include_directories(${PROJECT_SOURCE_DIR}/include)
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# Build the targets
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add_subdirectory(src)
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if (BENCHMARK_ENABLE_TESTING)
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enable_testing()
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if (BENCHMARK_ENABLE_GTEST_TESTS)
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include(HandleGTest)
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endif()
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add_subdirectory(test)
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endif()
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