Squashed 'third_party/google-benchmark/' content from commit 785e2c3
Change-Id: Iaaca5eca89f717081452e643a233e86425b03e89
git-subtree-dir: third_party/google-benchmark
git-subtree-split: 785e2c3158589e8ef48c59ba80e48d76bdbd8902
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..76e5fc5
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,268 @@
+cmake_minimum_required (VERSION 2.8.12)
+
+foreach(p
+ CMP0048 # OK to clear PROJECT_VERSION on project()
+ CMP0054 # CMake 3.1
+ CMP0056 # export EXE_LINKER_FLAGS to try_run
+ CMP0057 # Support no if() IN_LIST operator
+ )
+ if(POLICY ${p})
+ cmake_policy(SET ${p} NEW)
+ endif()
+endforeach()
+
+project (benchmark)
+
+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)
+if(NOT 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)
+
+# 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)
+
+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)
+ 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)
+
+# Tell the user what versions we are using
+string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})
+message(STATUS "Version: ${VERSION}")
+
+# The version of the libraries
+set(GENERIC_LIB_VERSION ${VERSION})
+string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
+
+# Import our CMake modules
+include(CheckCXXCompilerFlag)
+include(AddCXXCompilerFlag)
+include(CXXFeatureCheck)
+
+if (BENCHMARK_BUILD_32_BITS)
+ add_required_cxx_compiler_flag(-m32)
+endif()
+
+if (MSVC)
+ # Turn compiler warnings up to 11
+ string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${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()
+ # Try and enable C++11. Don't use C++14 because it doesn't work in some
+ # configurations.
+ add_cxx_compiler_flag(-std=c++11)
+ if (NOT HAVE_CXX_FLAG_STD_CXX11)
+ add_cxx_compiler_flag(-std=c++0x)
+ endif()
+
+ # 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(-Werror RELEASE)
+ add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
+ add_cxx_compiler_flag(-Werror MINSIZEREL)
+ 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")
+ # Intel silently ignores '-Wno-deprecated-declarations',
+ # warning no. 1786 must be explicitly disabled.
+ # See #631 for rationale.
+ add_cxx_compiler_flag(-wd1786)
+ endif()
+ # Disable deprecation warnings for release builds (when -Werror is enabled).
+ add_cxx_compiler_flag(-Wno-deprecated RELEASE)
+ add_cxx_compiler_flag(-Wno-deprecated RELWITHDEBINFO)
+ add_cxx_compiler_flag(-Wno-deprecated MINSIZEREL)
+ 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") #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)
+ 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 ourselfs
+ # since we depend on GNU/POSIX/BSD extensions.
+ if (CYGWIN)
+ add_definitions(-D_GNU_SOURCE=1)
+ endif()
+
+ # Link time optimisation
+ if (BENCHMARK_ENABLE_LTO)
+ add_cxx_compiler_flag(-flto)
+ if ("${CMAKE_C_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_C_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
+ "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
+ add_cxx_compiler_flag(-nostdinc++)
+ message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
+ # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
+ # configuration checks such as 'find_package(Threads)'
+ list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
+ # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
+ # linker flags appear before all linker inputs and -lc++ must appear after.
+ list(APPEND BENCHMARK_CXX_LIBRARIES c++)
+ else()
+ message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
+ endif()
+endif(BENCHMARK_USE_LIBCXX)
+
+# C++ feature checks
+# Determine the correct regular expression engine to use
+cxx_feature_check(STD_REGEX)
+cxx_feature_check(GNU_POSIX_REGEX)
+cxx_feature_check(POSIX_REGEX)
+if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
+ message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
+endif()
+if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
+ AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
+ message(WARNING "Using std::regex with exceptions disabled is not fully supported")
+endif()
+cxx_feature_check(STEADY_CLOCK)
+# Ensure we have pthreads
+find_package(Threads REQUIRED)
+
+# Set up directories
+include_directories(${PROJECT_SOURCE_DIR}/include)
+
+# Build the targets
+add_subdirectory(src)
+
+if (BENCHMARK_ENABLE_TESTING)
+ enable_testing()
+ if (BENCHMARK_ENABLE_GTEST_TESTS)
+ include(HandleGTest)
+ endif()
+ add_subdirectory(test)
+endif()