# Require CMake 3.10. If available, use the policies up to CMake 3.22.
cmake_minimum_required (VERSION 3.10...3.22)
project (benchmark VERSION 1.8.3 LANGUAGES CXX)
option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
option(BENCHMARK_ENABLE_WERROR "Build Release candidates with -Werror." ON)
option(BENCHMARK_FORCE_WERROR "Build Release candidates with -Werror regardless of compiler issues." OFF)
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "PGI")
# PGC++ maybe reporting false positives.
set(BENCHMARK_ENABLE_WERROR OFF)
endif()
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "NVHPC")
set(BENCHMARK_ENABLE_WERROR OFF)
endif()
if(BENCHMARK_FORCE_WERROR)
set(BENCHMARK_ENABLE_WERROR ON)
endif(BENCHMARK_FORCE_WERROR)
if(NOT (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC"))
option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
else()
set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
endif()
option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
option(BENCHMARK_ENABLE_DOXYGEN "Build documentation with Doxygen." OFF)
option(BENCHMARK_INSTALL_DOCS "Enable installation of documentation." ON)
# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
# may require downloading the source code.
option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
# This option can be used to disable building and running unit tests which depend on gtest
# in cases where it is not possible to build or find a valid version of gtest.
option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
option(BENCHMARK_USE_BUNDLED_GTEST "Use bundled GoogleTest. If disabled, the find_package(GTest) will be used." ON)
option(BENCHMARK_ENABLE_LIBPFM "Enable performance counters provided by libpfm" OFF)
# Export only public symbols
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# As of CMake 3.18, CMAKE_SYSTEM_PROCESSOR is not set properly for MSVC and
# cross-compilation (e.g. Host=x86_64, target=aarch64) requires using the
# undocumented, but working variable.
# See https://gitlab.kitware.com/cmake/cmake/-/issues/15170
set(CMAKE_SYSTEM_PROCESSOR ${MSVC_CXX_ARCHITECTURE_ID})
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "ARM")
set(CMAKE_CROSSCOMPILING TRUE)
endif()
endif()
set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
function(should_enable_assembly_tests)
if(CMAKE_BUILD_TYPE)
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
# FIXME: The --coverage flag needs to be removed when building assembly
# tests for this to work.
return()
endif()
endif()
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
return()
elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
return()
elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
# FIXME: Make these work on 32 bit builds
return()
elseif(BENCHMARK_BUILD_32_BITS)
# FIXME: Make these work on 32 bit builds
return()
endif()
find_program(LLVM_FILECHECK_EXE FileCheck)
if (LLVM_FILECHECK_EXE)
set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
else()
message(STATUS "Failed to find LLVM FileCheck")
return()
endif()
set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
endfunction()
should_enable_assembly_tests()
# This option disables the building and running of the assembly verification tests
option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
${ENABLE_ASSEMBLY_TESTS_DEFAULT})
# Make sure we can import out CMake functions
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
# Read the git tags to determine the project version
include(GetGitVersion)
get_git_version(GIT_VERSION)
# If no git version can be determined, use the version
# from the project() command
if ("${GIT_VERSION}" STREQUAL "0.0.0")
set(VERSION "v${benchmark_VERSION}")
else()
set(VERSION "${GIT_VERSION}")
endif()
# Normalize version: drop "v" prefix, replace first "-" with ".",
# drop everything after second "-" (including said "-").
string(STRIP ${VERSION} VERSION)
if(VERSION MATCHES v[^-]*-)
string(REGEX REPLACE "v([^-]*)-([0-9]+)-.*" "\\1.\\2" NORMALIZED_VERSION ${VERSION})
else()
string(REGEX REPLACE "v(.*)" "\\1" NORMALIZED_VERSION ${VERSION})
endif()
# Tell the user what versions we are using
message(STATUS "Google Benchmark version: ${VERSION}, normalized to ${NORMALIZED_VERSION}")
# The version of the libraries
set(GENERIC_LIB_VERSION ${NORMALIZED_VERSION})
string(SUBSTRING ${NORMALIZED_VERSION} 0 1 GENERIC_LIB_SOVERSION)
# Import our CMake modules
include(AddCXXCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckLibraryExists)
include(CXXFeatureCheck)
check_library_exists(rt shm_open "" HAVE_LIB_RT)
if (BENCHMARK_BUILD_32_BITS)
add_required_cxx_compiler_flag(-m32)
endif()
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
set(BENCHMARK_CXX_STANDARD 14)
else()
set(BENCHMARK_CXX_STANDARD 11)
endif()
set(CMAKE_CXX_STANDARD ${BENCHMARK_CXX_STANDARD})
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS OFF)
if (MSVC)
# Turn compiler warnings up to 11
string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-EHs-)
add_cxx_compiler_flag(-EHa-)
add_definitions(-D_HAS_EXCEPTIONS=0)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
endif()
else()
# Turn on Large-file Support
add_definitions(-D_FILE_OFFSET_BITS=64)
add_definitions(-D_LARGEFILE64_SOURCE)
add_definitions(-D_LARGEFILE_SOURCE)
# Turn compiler warnings up to 11
add_cxx_compiler_flag(-Wall)
add_cxx_compiler_flag(-Wextra)
add_cxx_compiler_flag(-Wshadow)
add_cxx_compiler_flag(-Wfloat-equal)
add_cxx_compiler_flag(-Wold-style-cast)
if(BENCHMARK_ENABLE_WERROR)
add_cxx_compiler_flag(-Werror)
endif()
if (NOT BENCHMARK_ENABLE_TESTING)
# Disable warning when compiling tests as gtest does not use 'override'.
add_cxx_compiler_flag(-Wsuggest-override)
endif()
add_cxx_compiler_flag(-pedantic)
add_cxx_compiler_flag(-pedantic-errors)
add_cxx_compiler_flag(-Wshorten-64-to-32)
add_cxx_compiler_flag(-fstrict-aliasing)
# Disable warnings regarding deprecated parts of the library while building
# and testing those parts of the library.
add_cxx_compiler_flag(-Wno-deprecated-declarations)
if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel" OR CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
# Intel silently ignores '-Wno-deprecated-declarations',
# warning no. 1786 must be explicitly disabled.
# See #631 for rationale.
add_cxx_compiler_flag(-wd1786)
add_cxx_compiler_flag(-fno-finite-math-only)
endif()
# Disable deprecation warnings for release builds (when -Werror is enabled).
if(BENCHMARK_ENABLE_WERROR)
add_cxx_compiler_flag(-Wno-deprecated)
endif()
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-fno-exceptions)
endif()
if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM") #ICC17u2: Many false positives for Wstrict-aliasing
add_cxx_compiler_flag(-Wstrict-aliasing)
endif()
endif()
# ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
# (because of deprecated overload)
add_cxx_compiler_flag(-wd654)
add_cxx_compiler_flag(-Wthread-safety)
if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
cxx_feature_check(THREAD_SAFETY_ATTRIBUTES "-DINCLUDE_DIRECTORIES=${PROJECT_SOURCE_DIR}/include")
endif()
# On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
# predefined macro, which turns on all of the wonderful libc extensions.
# However g++ doesn't do this in Cygwin so we have to define it ourselves
# since we depend on GNU/POSIX/BSD extensions.
if (CYGWIN)
add_definitions(-D_GNU_SOURCE=1)
endif()
if (QNXNTO)
add_definitions(-D_QNX_SOURCE)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
add_cxx_compiler_flag(-flto)
add_cxx_compiler_flag(-Wno-lto-type-mismatch)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
find_program(GCC_AR gcc-ar)
if (GCC_AR)
set(CMAKE_AR ${GCC_AR})
endif()
find_program(GCC_RANLIB gcc-ranlib)
if (GCC_RANLIB)
set(CMAKE_RANLIB ${GCC_RANLIB})
endif()
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
include(llvm-toolchain)
endif()
endif()
# Coverage build type
set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE)
set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE)
set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE)
mark_as_advanced(
BENCHMARK_CXX_FLAGS_COVERAGE
BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
add_cxx_compiler_flag(--coverage COVERAGE)
endif()
if (BENCHMARK_USE_LIBCXX)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
add_cxx_compiler_flag(-stdlib=libc++)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "IntelLLVM")
add_cxx_compiler_flag(-nostdinc++)
message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
# Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
# configuration checks such as 'find_package(Threads)'
list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
# -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
# linker flags appear before all linker inputs and -lc++ must appear after.
list(APPEND BENCHMARK_CXX_LIBRARIES c++)
else()
message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
endif()
endif(BENCHMARK_USE_LIBCXX)
set(EXTRA_CXX_FLAGS "")
if (WIN32 AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
# Clang on Windows fails to compile the regex feature check under C++11
set(EXTRA_CXX_FLAGS "-DCMAKE_CXX_STANDARD=14")
endif()
# C++ feature checks
# Determine the correct regular expression engine to use
cxx_feature_check(STD_REGEX ${EXTRA_CXX_FLAGS})
cxx_feature_check(GNU_POSIX_REGEX ${EXTRA_CXX_FLAGS})
cxx_feature_check(POSIX_REGEX ${EXTRA_CXX_FLAGS})
if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
endif()
if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(WARNING "Using std::regex with exceptions disabled is not fully supported")
endif()
cxx_feature_check(STEADY_CLOCK)
# Ensure we have pthreads
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
cxx_feature_check(PTHREAD_AFFINITY)
if (BENCHMARK_ENABLE_LIBPFM)
find_package(PFM REQUIRED)
endif()
# Set up directories
include_directories(${PROJECT_SOURCE_DIR}/include)
# Build the targets
add_subdirectory(src)
if (BENCHMARK_ENABLE_TESTING)
enable_testing()
if (BENCHMARK_ENABLE_GTEST_TESTS AND
NOT (TARGET gtest AND TARGET gtest_main AND
TARGET gmock AND TARGET gmock_main))
if (BENCHMARK_USE_BUNDLED_GTEST)
include(GoogleTest)
else()
find_package(GTest CONFIG REQUIRED)
add_library(gtest ALIAS GTest::gtest)
add_library(gtest_main ALIAS GTest::gtest_main)
add_library(gmock ALIAS GTest::gmock)
add_library(gmock_main ALIAS GTest::gmock_main)
endif()
endif()
add_subdirectory(test)
endif()
Codebase Browser
llvm