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build: Add CMake-based build system
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‎.gitignore

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test*
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bench
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# CMake build directories.
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/*build*

‎CMakeLists.txt

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cmake_minimum_required(VERSION 3.22)
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#=============================
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# Project / Package Metadata
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#=============================
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project(minisketch
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VERSION 0.0.1
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DESCRIPTION "A library for BCH-based set reconciliation"
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HOMEPAGE_URL "https://github.com/bitcoin-core/minisketch"
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LANGUAGES CXX
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)
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# ============================================================
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# Project Initialization
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# ============================================================
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enable_testing()
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include(CTestUseLaunchers)
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list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
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if(NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
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endif()
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if(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
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set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
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endif()
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if(NOT CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
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set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
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endif()
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# Prevent include directories from parent project from leaking into this one.
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set_property(DIRECTORY PROPERTY INCLUDE_DIRECTORIES "")
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#=============================
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# Language Setup
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#=============================
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if(DEFINED CMAKE_CXX_STANDARD)
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if(CMAKE_CXX_STANDARD EQUAL 98 OR CMAKE_CXX_STANDARD LESS 11)
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message(FATAL_ERROR "This project requires at least C++11")
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endif()
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else()
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set(CMAKE_CXX_STANDARD 11)
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endif()
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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if(NOT DEFINED CMAKE_CXX_EXTENSIONS)
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set(CMAKE_CXX_EXTENSIONS OFF)
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endif()
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#=============================
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# Configurable Options
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#=============================
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option(MINISKETCH_INSTALL "Enable installation." ${PROJECT_IS_TOP_LEVEL})
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if(NOT PROJECT_IS_TOP_LEVEL)
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mark_as_advanced(MINISKETCH_INSTALL)
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endif()
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option(MINISKETCH_BUILD_TESTS "Build tests." ON)
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option(MINISKETCH_BUILD_BENCHMARK "Build benchmark." OFF)
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set(supported_fields "")
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set(have_enabled_fields NO)
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set(have_disabled_fields NO)
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foreach(i RANGE 2 64)
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list(APPEND supported_fields ${i})
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endforeach()
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if(NOT DEFINED MINISKETCH_FIELDS)
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set(MINISKETCH_FIELDS ${supported_fields} CACHE STRING "Semicolon-separated list of field sizes to build. Default=all. Available sizes: ${supported_fields}.")
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endif()
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foreach(field IN LISTS supported_fields)
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if(field IN_LIST MINISKETCH_FIELDS)
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set(have_enabled_fields YES)
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else()
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set(have_disabled_fields YES)
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add_compile_definitions(DISABLE_FIELD_${field})
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endif()
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endforeach()
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if(NOT have_enabled_fields)
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message(FATAL_ERROR "No field sizes are enabled.")
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endif()
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unset(have_enabled_fields)
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unset(supported_fields)
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#=============================
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# Build Options
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#=============================
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set(CMAKE_CXX_VISIBILITY_PRESET hidden)
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if(MSVC)
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add_compile_options(/Zc:__cplusplus)
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endif()
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if(MINGW)
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add_link_options(-static)
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endif()
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#=============================
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# Diagnostics Options
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#=============================
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if(MSVC)
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# For both MSVC's cl.exe and clang-cl compilers.
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add_compile_options(/W3) # Production quality warning level. Enables -Wall Clang's core option.
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else()
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add_compile_options(-Wall)
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endif()
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if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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add_compile_options(/wd4060) # Disable warning C4060 "switch statement contains no 'case' or 'default' labels".
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add_compile_options(/wd4065) # Disable warning C4065 "switch statement contains 'default' but no 'case' labels".
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add_compile_options(/wd4146) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned".
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add_compile_options(/wd4244) # Disable warning C4244 "conversion from 'type1' to 'type2', possible loss of data".
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else()
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add_compile_options(-Wundef)
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endif()
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#=============================
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# Main Processing
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#=============================
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include(SystemIntrospection)
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add_subdirectory(src)
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include(PrintConfigureSummary)
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print_configure_summary()

‎cmake/PrintConfigureSummary.cmake

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include_guard(GLOBAL)
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function(indent_message header content indent_num)
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if(indent_num GREATER 0)
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string(REPEAT " " ${indent_num} indentation)
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string(REPEAT "." ${indent_num} tail)
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string(REGEX REPLACE "${tail}$" "" header "${header}")
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endif()
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message("${indentation}${header} ${content}")
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endfunction()
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# Print compiler's flags on best-effort. Include the abstracted
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# CMake flags that we touch ourselves.
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function(print_flags_per_config config indent_num)
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string(STRIP "${CMAKE_CXX_COMPILER_ARG1} ${CMAKE_CXX_FLAGS}" combined_cxx_flags)
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string(TOUPPER "${config}" config_uppercase)
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string(STRIP "${combined_cxx_flags} ${CMAKE_CXX_FLAGS_${config_uppercase}}" combined_cxx_flags)
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string(STRIP "${combined_cxx_flags} ${CMAKE_CXX${CMAKE_CXX_STANDARD}_STANDARD_COMPILE_OPTION}" combined_cxx_flags)
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if(CMAKE_POSITION_INDEPENDENT_CODE)
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string(JOIN " " combined_cxx_flags ${combined_cxx_flags} ${CMAKE_CXX_COMPILE_OPTIONS_PIC})
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endif()
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if(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY AND CMAKE_CXX_VISIBILITY_PRESET)
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string(JOIN " " combined_cxx_flags ${combined_cxx_flags} ${CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY}${CMAKE_CXX_VISIBILITY_PRESET})
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endif()
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get_directory_property(compile_options COMPILE_OPTIONS)
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string(JOIN " " combined_cxx_flags ${combined_cxx_flags} ${compile_options})
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indent_message("CXXFLAGS .............................." "${combined_cxx_flags}" ${indent_num})
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endfunction()
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function(print_configure_summary)
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message("")
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if(PROJECT_IS_TOP_LEVEL)
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message("Configure summary")
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message("=================")
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else()
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message("minisketch configure summary")
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message("============================")
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endif()
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if(BUILD_SHARED_LIBS)
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set(library_type "Shared")
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else()
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set(library_type "Static")
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endif()
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message("Library type .......................... ${library_type}")
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message("Build options:")
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if(have_disabled_fields)
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set(filed_sizes "${MINISKETCH_FIELDS}")
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else()
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set(filed_sizes "All")
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endif()
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message(" field sizes ........................ ${filed_sizes}")
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if(HAVE_CLMUL)
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set(clmul_status "Enabled")
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else()
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set(clmul_status "Disabled")
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endif()
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message(" clmul fields ........................ ${clmul_status}")
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if(CMAKE_CXX_STANDARD GREATER_EQUAL 20)
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set(clz_status "C++20")
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elseif(HAVE_CLZ)
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set(clz_status "Compiler builtin")
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else()
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set(clz_status "Default")
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endif()
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message(" clz implementation .................. ${clz_status}")
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message("Optional binaries:")
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message(" benchmark ........................... ${MINISKETCH_BUILD_BENCHMARK}")
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message(" tests ............................... ${MINISKETCH_BUILD_TESTS}")
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message("")
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if(CMAKE_CROSSCOMPILING)
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set(cross_status "TRUE, for ${CMAKE_SYSTEM_NAME}, ${CMAKE_SYSTEM_PROCESSOR}")
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else()
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set(cross_status "FALSE")
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endif()
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message("Cross compiling ....................... ${cross_status}")
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message("C++ compiler .......................... ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}, ${CMAKE_CXX_COMPILER}")
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get_property(_is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
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if(_is_multi_config)
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list(JOIN CMAKE_CONFIGURATION_TYPES ", " configs)
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message("Available build configurations ........ ${configs}")
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if(CMAKE_GENERATOR MATCHES "Visual Studio")
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set(default_config "Debug")
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else()
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list(GET CMAKE_CONFIGURATION_TYPES 0 default_config)
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endif()
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message("Default build configuration ........... ${default_config}")
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foreach(config IN LISTS CMAKE_CONFIGURATION_TYPES)
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message("'${config}' build configuration:")
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print_flags_per_config("${config}" 2)
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endforeach()
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else()
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message("CMAKE_BUILD_TYPE ...................... ${CMAKE_BUILD_TYPE}")
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print_flags_per_config("${CMAKE_BUILD_TYPE}" 0)
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endif()
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unset(_is_multi_config)
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message([=[
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NOTE: The summary above may not exactly match the final applied build flags
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if any additional CMAKE_* or environment variables have been modified.
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To see the exact flags applied, build with the --verbose option.]=]
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)
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if(have_disabled_fields AND PROJECT_IS_TOP_LEVEL)
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message("")
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message(WARNING
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"Only compiling in support for field sizes: ${MINISKETCH_FIELDS}\n"
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"This means the library will lack support for other field sizes entirely.\n"
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)
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endif()
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message("")
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endfunction()

‎cmake/SystemIntrospection.cmake

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include_guard(GLOBAL)
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include(CheckCXXSourceCompiles)
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include(CMakePushCheckState)
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cmake_push_check_state(RESET)
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# Check for clmul instructions support.
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if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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set(CMAKE_REQUIRED_FLAGS "-mpclmul")
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endif()
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check_cxx_source_compiles("
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#include <immintrin.h>
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#include <stdint.h>
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int main()
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{
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__m128i a = _mm_cvtsi64_si128((uint64_t)7);
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__m128i b = _mm_clmulepi64_si128(a, a, 37);
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__m128i c = _mm_srli_epi64(b, 41);
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__m128i d = _mm_xor_si128(b, c);
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uint64_t e = _mm_cvtsi128_si64(d);
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return e == 0;
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}
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" HAVE_CLMUL
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)
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if(HAVE_CLMUL)
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set(CLMUL_CXXFLAGS ${CMAKE_REQUIRED_FLAGS})
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endif()
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if(CMAKE_CXX_STANDARD LESS 20)
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# Check for working clz builtins.
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check_cxx_source_compiles("
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int main()
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{
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unsigned a = __builtin_clz(1);
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unsigned long b = __builtin_clzl(1);
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unsigned long long c = __builtin_clzll(1);
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}
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" HAVE_CLZ
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)
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endif()
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cmake_pop_check_state()

‎src/CMakeLists.txt

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add_library(minisketch_field_sources INTERFACE)
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target_sources(minisketch_field_sources
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INTERFACE
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fields/generic_1byte.cpp
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fields/generic_2bytes.cpp
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fields/generic_3bytes.cpp
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fields/generic_4bytes.cpp
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fields/generic_5bytes.cpp
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fields/generic_6bytes.cpp
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fields/generic_7bytes.cpp
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fields/generic_8bytes.cpp
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)
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if(HAVE_CLMUL)
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set(clmul_sources
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fields/clmul_1byte.cpp
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fields/clmul_2bytes.cpp
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fields/clmul_3bytes.cpp
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fields/clmul_4bytes.cpp
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fields/clmul_5bytes.cpp
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fields/clmul_6bytes.cpp
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fields/clmul_7bytes.cpp
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fields/clmul_8bytes.cpp
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)
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set_property(SOURCE minisketch.cpp
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PROPERTY COMPILE_DEFINITIONS HAVE_CLMUL
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)
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set_property(SOURCE ${clmul_sources}
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PROPERTY COMPILE_OPTIONS ${CLMUL_CXXFLAGS}
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)
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target_sources(minisketch_field_sources INTERFACE ${clmul_sources})
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endif()
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add_compile_definitions($<$<BOOL:${HAVE_CLZ}>:HAVE_CLZ>)
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add_library(minisketch minisketch.cpp)
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set_property(TARGET minisketch PROPERTY PUBLIC_HEADER
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${PROJECT_SOURCE_DIR}/include/minisketch.h
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)
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target_include_directories(minisketch
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INTERFACE
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$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
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)
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target_link_libraries(minisketch PRIVATE minisketch_field_sources)
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add_library(minisketch_verify EXCLUDE_FROM_ALL minisketch.cpp)
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target_compile_definitions(minisketch_verify
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PUBLIC
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MINISKETCH_VERIFY
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)
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target_link_libraries(minisketch_verify PRIVATE minisketch_field_sources)
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if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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target_compile_options(minisketch_verify
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PRIVATE
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/wd4702
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)
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endif()
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if(MINISKETCH_BUILD_TESTS)
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add_executable(test-noverify test.cpp)
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target_link_libraries(test-noverify PRIVATE minisketch)
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add_test(NAME ${PROJECT_NAME}_test_noverify COMMAND test-noverify)
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add_executable(test-verify test.cpp)
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target_link_libraries(test-verify PRIVATE minisketch_verify)
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add_test(NAME ${PROJECT_NAME}_test_verify COMMAND test-verify)
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endif()
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if(MINISKETCH_BUILD_BENCHMARK)
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add_executable(bench bench.cpp)
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target_link_libraries(bench PRIVATE minisketch)
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endif()
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if(MINISKETCH_INSTALL)
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include(GNUInstallDirs)
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install(TARGETS minisketch)
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endif()

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