cmake_minimum_required(VERSION 3.13) if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.15) # MSVC runtime library flags are selected by the CMAKE_MSVC_RUNTIME_LIBRARY abstraction. cmake_policy(SET CMP0091 NEW) # MSVC warning flags are not in CMAKE__FLAGS by default. cmake_policy(SET CMP0092 NEW) endif() project(libsecp256k1 # The package (a.k.a. release) version is based on semantic versioning 2.0.0 of # the API. All changes in experimental modules are treated as # backwards-compatible and therefore at most increase the minor version. VERSION 0.4.1 DESCRIPTION "Optimized C library for ECDSA signatures and secret/public key operations on curve secp256k1." HOMEPAGE_URL "https://github.com/bitcoin-core/secp256k1" LANGUAGES C ) if(CMAKE_VERSION VERSION_LESS 3.21) get_directory_property(parent_directory PARENT_DIRECTORY) if(parent_directory) set(PROJECT_IS_TOP_LEVEL OFF CACHE INTERNAL "Emulates CMake 3.21+ behavior.") set(${PROJECT_NAME}_IS_TOP_LEVEL OFF CACHE INTERNAL "Emulates CMake 3.21+ behavior.") else() set(PROJECT_IS_TOP_LEVEL ON CACHE INTERNAL "Emulates CMake 3.21+ behavior.") set(${PROJECT_NAME}_IS_TOP_LEVEL ON CACHE INTERNAL "Emulates CMake 3.21+ behavior.") endif() unset(parent_directory) endif() # The library version is based on libtool versioning of the ABI. The set of # rules for updating the version can be found here: # https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html # All changes in experimental modules are treated as if they don't affect the # interface and therefore only increase the revision. set(${PROJECT_NAME}_LIB_VERSION_CURRENT 3) set(${PROJECT_NAME}_LIB_VERSION_REVISION 1) set(${PROJECT_NAME}_LIB_VERSION_AGE 1) set(CMAKE_C_STANDARD 90) set(CMAKE_C_EXTENSIONS OFF) list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake) option(BUILD_SHARED_LIBS "Build shared libraries." ON) option(SECP256K1_DISABLE_SHARED "Disable shared library. Overrides BUILD_SHARED_LIBS." OFF) if(SECP256K1_DISABLE_SHARED) set(BUILD_SHARED_LIBS OFF) endif() option(SECP256K1_INSTALL "Enable installation." ${PROJECT_IS_TOP_LEVEL}) option(SECP256K1_ENABLE_MODULE_ECDH "Enable ECDH module." ON) if(SECP256K1_ENABLE_MODULE_ECDH) add_compile_definitions(ENABLE_MODULE_ECDH=1) endif() option(SECP256K1_ENABLE_MODULE_RECOVERY "Enable ECDSA pubkey recovery module." OFF) if(SECP256K1_ENABLE_MODULE_RECOVERY) add_compile_definitions(ENABLE_MODULE_RECOVERY=1) endif() option(SECP256K1_ENABLE_MODULE_EXTRAKEYS "Enable extrakeys module." ON) option(SECP256K1_ENABLE_MODULE_SCHNORRSIG "Enable schnorrsig module." ON) if(SECP256K1_ENABLE_MODULE_SCHNORRSIG) set(SECP256K1_ENABLE_MODULE_EXTRAKEYS ON) add_compile_definitions(ENABLE_MODULE_SCHNORRSIG=1) endif() if(SECP256K1_ENABLE_MODULE_EXTRAKEYS) add_compile_definitions(ENABLE_MODULE_EXTRAKEYS=1) endif() option(SECP256K1_ENABLE_MODULE_ELLSWIFT "Enable ElligatorSwift module." ON) if(SECP256K1_ENABLE_MODULE_ELLSWIFT) add_compile_definitions(ENABLE_MODULE_ELLSWIFT=1) endif() option(SECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS "Enable external default callback functions." OFF) if(SECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS) add_compile_definitions(USE_EXTERNAL_DEFAULT_CALLBACKS=1) endif() set(SECP256K1_ECMULT_WINDOW_SIZE "AUTO" CACHE STRING "Window size for ecmult precomputation for verification, specified as integer in range [2..24]. \"AUTO\" is a reasonable setting for desktop machines (currently 15). [default=AUTO]") set_property(CACHE SECP256K1_ECMULT_WINDOW_SIZE PROPERTY STRINGS "AUTO" 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24) include(CheckStringOptionValue) check_string_option_value(SECP256K1_ECMULT_WINDOW_SIZE) if(SECP256K1_ECMULT_WINDOW_SIZE STREQUAL "AUTO") set(SECP256K1_ECMULT_WINDOW_SIZE 15) endif() add_compile_definitions(ECMULT_WINDOW_SIZE=${SECP256K1_ECMULT_WINDOW_SIZE}) set(SECP256K1_ECMULT_GEN_PREC_BITS "AUTO" CACHE STRING "Precision bits to tune the precomputed table size for signing, specified as integer 2, 4 or 8. \"AUTO\" is a reasonable setting for desktop machines (currently 4). [default=AUTO]") set_property(CACHE SECP256K1_ECMULT_GEN_PREC_BITS PROPERTY STRINGS "AUTO" 2 4 8) check_string_option_value(SECP256K1_ECMULT_GEN_PREC_BITS) if(SECP256K1_ECMULT_GEN_PREC_BITS STREQUAL "AUTO") set(SECP256K1_ECMULT_GEN_PREC_BITS 4) endif() add_compile_definitions(ECMULT_GEN_PREC_BITS=${SECP256K1_ECMULT_GEN_PREC_BITS}) set(SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY "OFF" CACHE STRING "Test-only override of the (autodetected by the C code) \"widemul\" setting. Legal values are: \"OFF\", \"int128_struct\", \"int128\" or \"int64\". [default=OFF]") set_property(CACHE SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY PROPERTY STRINGS "OFF" "int128_struct" "int128" "int64") check_string_option_value(SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY) if(SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY) string(TOUPPER "${SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY}" widemul_upper_value) add_compile_definitions(USE_FORCE_WIDEMUL_${widemul_upper_value}=1) endif() mark_as_advanced(FORCE SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY) set(SECP256K1_ASM "AUTO" CACHE STRING "Assembly to use: \"AUTO\", \"OFF\", \"x86_64\" or \"arm32\" (experimental). [default=AUTO]") set_property(CACHE SECP256K1_ASM PROPERTY STRINGS "AUTO" "OFF" "x86_64" "arm32") check_string_option_value(SECP256K1_ASM) if(SECP256K1_ASM STREQUAL "arm32") enable_language(ASM) include(CheckArm32Assembly) check_arm32_assembly() if(HAVE_ARM32_ASM) add_compile_definitions(USE_EXTERNAL_ASM=1) else() message(FATAL_ERROR "ARM32 assembly requested but not available.") endif() elseif(SECP256K1_ASM) include(CheckX86_64Assembly) check_x86_64_assembly() if(HAVE_X86_64_ASM) set(SECP256K1_ASM "x86_64") add_compile_definitions(USE_ASM_X86_64=1) elseif(SECP256K1_ASM STREQUAL "AUTO") set(SECP256K1_ASM "OFF") else() message(FATAL_ERROR "x86_64 assembly requested but not available.") endif() endif() option(SECP256K1_EXPERIMENTAL "Allow experimental configuration options." OFF) if(NOT SECP256K1_EXPERIMENTAL) if(SECP256K1_ASM STREQUAL "arm32") message(FATAL_ERROR "ARM32 assembly is experimental. Use -DSECP256K1_EXPERIMENTAL=ON to allow.") endif() endif() set(SECP256K1_VALGRIND "AUTO" CACHE STRING "Build with extra checks for running inside Valgrind. [default=AUTO]") set_property(CACHE SECP256K1_VALGRIND PROPERTY STRINGS "AUTO" "OFF" "ON") check_string_option_value(SECP256K1_VALGRIND) if(SECP256K1_VALGRIND) find_package(Valgrind MODULE) if(Valgrind_FOUND) set(SECP256K1_VALGRIND ON) include_directories(${Valgrind_INCLUDE_DIR}) add_compile_definitions(VALGRIND) elseif(SECP256K1_VALGRIND STREQUAL "AUTO") set(SECP256K1_VALGRIND OFF) else() message(FATAL_ERROR "Valgrind support requested but valgrind/memcheck.h header not available.") endif() endif() option(SECP256K1_BUILD_BENCHMARK "Build benchmarks." ON) option(SECP256K1_BUILD_TESTS "Build tests." ON) option(SECP256K1_BUILD_EXHAUSTIVE_TESTS "Build exhaustive tests." ON) option(SECP256K1_BUILD_CTIME_TESTS "Build constant-time tests." ${SECP256K1_VALGRIND}) option(SECP256K1_BUILD_EXAMPLES "Build examples." OFF) # Redefine configuration flags. # We leave assertions on, because they are only used in the examples, and we want them always on there. if(MSVC) string(REGEX REPLACE "/DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}") string(REGEX REPLACE "/DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}") string(REGEX REPLACE "/DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}") else() string(REGEX REPLACE "-DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}") string(REGEX REPLACE "-DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}") string(REGEX REPLACE "-DNDEBUG[ \t\r\n]*" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}") # Prefer -O2 optimization level. (-O3 is CMake's default for Release for many compilers.) string(REGEX REPLACE "-O3[ \t\r\n]*" "-O2" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}") endif() # Define custom "Coverage" build type. set(CMAKE_C_FLAGS_COVERAGE "${CMAKE_C_FLAGS_RELWITHDEBINFO} -O0 -DCOVERAGE=1 --coverage" CACHE STRING "Flags used by the C compiler during \"Coverage\" builds." FORCE ) set(CMAKE_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} --coverage" CACHE STRING "Flags used for linking binaries during \"Coverage\" builds." FORCE ) set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} --coverage" CACHE STRING "Flags used by the shared libraries linker during \"Coverage\" builds." FORCE ) mark_as_advanced( CMAKE_C_FLAGS_COVERAGE CMAKE_EXE_LINKER_FLAGS_COVERAGE CMAKE_SHARED_LINKER_FLAGS_COVERAGE ) get_property(is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG) set(default_build_type "RelWithDebInfo") if(is_multi_config) set(CMAKE_CONFIGURATION_TYPES "${default_build_type}" "Release" "Debug" "MinSizeRel" "Coverage" CACHE STRING "Supported configuration types." FORCE ) else() set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${default_build_type}" "Release" "Debug" "MinSizeRel" "Coverage" ) if(NOT CMAKE_BUILD_TYPE) message(STATUS "Setting build type to \"${default_build_type}\" as none was specified") set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE STRING "Choose the type of build." FORCE ) endif() endif() include(TryAppendCFlags) if(MSVC) # Keep the following commands ordered lexicographically. try_append_c_flags(/W3) # Production quality warning level. try_append_c_flags(/wd4146) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned". try_append_c_flags(/wd4244) # Disable warning C4244 "'conversion' conversion from 'type1' to 'type2', possible loss of data". try_append_c_flags(/wd4267) # Disable warning C4267 "'var' : conversion from 'size_t' to 'type', possible loss of data". # Eliminate deprecation warnings for the older, less secure functions. add_compile_definitions(_CRT_SECURE_NO_WARNINGS) else() # Keep the following commands ordered lexicographically. try_append_c_flags(-pedantic) try_append_c_flags(-Wall) # GCC >= 2.95 and probably many other compilers. try_append_c_flags(-Wcast-align) # GCC >= 2.95. try_append_c_flags(-Wcast-align=strict) # GCC >= 8.0. try_append_c_flags(-Wconditional-uninitialized) # Clang >= 3.0 only. try_append_c_flags(-Wextra) # GCC >= 3.4, this is the newer name of -W, which we don't use because older GCCs will warn about unused functions. try_append_c_flags(-Wnested-externs) try_append_c_flags(-Wno-long-long) # GCC >= 3.0, -Wlong-long is implied by -pedantic. try_append_c_flags(-Wno-overlength-strings) # GCC >= 4.2, -Woverlength-strings is implied by -pedantic. try_append_c_flags(-Wno-unused-function) # GCC >= 3.0, -Wunused-function is implied by -Wall. try_append_c_flags(-Wreserved-identifier) # Clang >= 13.0 only. try_append_c_flags(-Wshadow) try_append_c_flags(-Wstrict-prototypes) try_append_c_flags(-Wundef) endif() set(CMAKE_C_VISIBILITY_PRESET hidden) # Ask CTest to create a "check" target (e.g., make check) as alias for the "test" target. # CTEST_TEST_TARGET_ALIAS is not documented but supposed to be user-facing. # See: https://gitlab.kitware.com/cmake/cmake/-/commit/816c9d1aa1f2b42d40c81a991b68c96eb12b6d2 set(CTEST_TEST_TARGET_ALIAS check) include(CTest) # We do not use CTest's BUILD_TESTING because a single toggle for all tests is too coarse for our needs. mark_as_advanced(BUILD_TESTING) if(SECP256K1_BUILD_BENCHMARK OR SECP256K1_BUILD_TESTS OR SECP256K1_BUILD_EXHAUSTIVE_TESTS OR SECP256K1_BUILD_CTIME_TESTS OR SECP256K1_BUILD_EXAMPLES) enable_testing() endif() add_subdirectory(src) if(SECP256K1_BUILD_EXAMPLES) add_subdirectory(examples) endif() message("\n") message("secp256k1 configure summary") message("===========================") message("Build artifacts:") if(BUILD_SHARED_LIBS) set(library_type "Shared") else() set(library_type "Static") endif() message(" library type ........................ ${library_type}") message("Optional modules:") message(" ECDH ................................ ${SECP256K1_ENABLE_MODULE_ECDH}") message(" ECDSA pubkey recovery ............... ${SECP256K1_ENABLE_MODULE_RECOVERY}") message(" extrakeys ........................... ${SECP256K1_ENABLE_MODULE_EXTRAKEYS}") message(" schnorrsig .......................... ${SECP256K1_ENABLE_MODULE_SCHNORRSIG}") message(" ElligatorSwift ...................... ${SECP256K1_ENABLE_MODULE_ELLSWIFT}") message("Parameters:") message(" ecmult window size .................. ${SECP256K1_ECMULT_WINDOW_SIZE}") message(" ecmult gen precision bits ........... ${SECP256K1_ECMULT_GEN_PREC_BITS}") message("Optional features:") message(" assembly ............................ ${SECP256K1_ASM}") message(" external callbacks .................. ${SECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS}") if(SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY) message(" wide multiplication (test-only) ..... ${SECP256K1_TEST_OVERRIDE_WIDE_MULTIPLY}") endif() message("Optional binaries:") message(" benchmark ........................... ${SECP256K1_BUILD_BENCHMARK}") message(" noverify_tests ...................... ${SECP256K1_BUILD_TESTS}") set(tests_status "${SECP256K1_BUILD_TESTS}") if(CMAKE_BUILD_TYPE STREQUAL "Coverage") set(tests_status OFF) endif() message(" tests ............................... ${tests_status}") message(" exhaustive tests .................... ${SECP256K1_BUILD_EXHAUSTIVE_TESTS}") message(" ctime_tests ......................... ${SECP256K1_BUILD_CTIME_TESTS}") message(" examples ............................ ${SECP256K1_BUILD_EXAMPLES}") message("") if(CMAKE_CROSSCOMPILING) set(cross_status "TRUE, for ${CMAKE_SYSTEM_NAME}, ${CMAKE_SYSTEM_PROCESSOR}") else() set(cross_status "FALSE") endif() message("Cross compiling ....................... ${cross_status}") message("Valgrind .............................. ${SECP256K1_VALGRIND}") get_directory_property(definitions COMPILE_DEFINITIONS) string(REPLACE ";" " " definitions "${definitions}") message("Preprocessor defined macros ........... ${definitions}") message("C compiler ............................ ${CMAKE_C_COMPILER}") message("CFLAGS ................................ ${CMAKE_C_FLAGS}") get_directory_property(compile_options COMPILE_OPTIONS) string(REPLACE ";" " " compile_options "${compile_options}") message("Compile options ....................... " ${compile_options}) if(NOT is_multi_config) message("Build type:") message(" - CMAKE_BUILD_TYPE ................... ${CMAKE_BUILD_TYPE}") string(TOUPPER "${CMAKE_BUILD_TYPE}" build_type) message(" - CFLAGS ............................. ${CMAKE_C_FLAGS_${build_type}}") message(" - LDFLAGS for executables ............ ${CMAKE_EXE_LINKER_FLAGS_${build_type}}") message(" - LDFLAGS for shared libraries ....... ${CMAKE_SHARED_LINKER_FLAGS_${build_type}}") else() message("Supported configurations .............. ${CMAKE_CONFIGURATION_TYPES}") message("RelWithDebInfo configuration:") message(" - CFLAGS ............................. ${CMAKE_C_FLAGS_RELWITHDEBINFO}") message(" - LDFLAGS for executables ............ ${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}") message(" - LDFLAGS for shared libraries ....... ${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}") message("Debug configuration:") message(" - CFLAGS ............................. ${CMAKE_C_FLAGS_DEBUG}") message(" - LDFLAGS for executables ............ ${CMAKE_EXE_LINKER_FLAGS_DEBUG}") message(" - LDFLAGS for shared libraries ....... ${CMAKE_SHARED_LINKER_FLAGS_DEBUG}") endif() message("\n") if(SECP256K1_EXPERIMENTAL) message( " ******\n" " WARNING: experimental build\n" " Experimental features do not have stable APIs or properties, and may not be safe for production use.\n" " ******\n" ) endif()