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bitcoin-bitcoin-core/CMakeLists.txt
fanquake ca3d945dc6 Squashed 'src/secp256k1/' changes from d8311688bd..06bff6dec8 
06bff6dec8 Merge bitcoin-core/secp256k1#1528: tests: call `secp256k1_ecmult_multi_var` with a non-`NULL` error callback
4155e62fcc Merge bitcoin-core/secp256k1#1526: cmake: Fix `check_arm32_assembly` when using as subproject
9554362b15 tests: call secp256k1_ecmult_multi_var with a non-NULL error callback
9f4c8cd730 cmake: Fix `check_arm32_assembly` when using as subproject
7712a53061 Merge bitcoin-core/secp256k1#1524: check-abi: explicitly provide public headers
7d0bc0870f Merge bitcoin-core/secp256k1#1525: changelog: Correct 0.5.0 release date
d45d9b74bb changelog: Correct 0.5.0 release date
d7f6613dbb Merge bitcoin-core/secp256k1#1523: release cleanup: bump version after 0.5.0
2f05e2da4b release cleanup: bump version after 0.5.0
e3a885d42a Merge bitcoin-core/secp256k1#1522: release: prepare for 0.5.0
dd695563e6 check-abi: explicitly provide public headers
c0e4ec3fee release: prepare for 0.5.0
bb528cfb08 Merge bitcoin-core/secp256k1#1518: Add secp256k1_pubkey_sort
7d2591ce12 Add secp256k1_pubkey_sort
da515074e3 Merge bitcoin-core/secp256k1#1058: Signed-digit multi-comb ecmult_gen algorithm
4c341f89ab Add changelog entry for SDMC
a043940253 Permit COMB_BITS < 256 for exhaustive tests
39b2f2a321 Add test case for ecmult_gen recoded = {-1,0,1}
644e86de9a Reintroduce projective blinding
07810d9abb Reduce side channels from single-bit reads
a0d32b597d Optimization: use Nx32 representation for recoded bits
e03dcc44b5 Make secp256k1_scalar_get_bits support 32-bit reads
5005abee60 Rename scalar_get_bits -> scalar_get_bits_limb32; return uint32_t
6247f485b6 Optimization: avoid unnecessary doublings in precomputation
15d0cca2a6 Optimization: first table lookup needs no point addition
7a33db35cd Optimization: move (2^COMB_BITS-1)/2 term into ctx->scalar_offset
ed2a056f3d Provide 3 configurations accessible through ./configure
5f7be9f6a5 Always generate tables for current (blocks,teeth) config
fde1dfcd8d Signed-digit multi-comb ecmult_gen algorithm
486518b350 Make exhaustive tests's scalar_inverse(&x,&x) work
ab45c3e089 Initial gej blinding -> final ge blinding
aa00a6b892 Introduce CEIL_DIV macro and use it

git-subtree-dir: src/secp256k1
git-subtree-split: 06bff6dec8d038f7b4112664a9b882293ebc5178
2024-05-16 10:35:52 +08:00

369 lines
17 KiB
CMake
Raw Blame History

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_<LANG>_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 0.5.1
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(${PROJECT_NAME}_LIB_VERSION_CURRENT 4)
set(${PROJECT_NAME}_LIB_VERSION_REVISION 1)
set(${PROJECT_NAME}_LIB_VERSION_AGE 2)
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})
## Modules
# We declare all options before processing them, to make sure we can express
# dependendencies while processing.
option(SECP256K1_ENABLE_MODULE_ECDH "Enable ECDH module." ON)
option(SECP256K1_ENABLE_MODULE_RECOVERY "Enable ECDSA pubkey recovery module." OFF)
option(SECP256K1_ENABLE_MODULE_EXTRAKEYS "Enable extrakeys module." ON)
option(SECP256K1_ENABLE_MODULE_SCHNORRSIG "Enable schnorrsig module." ON)
option(SECP256K1_ENABLE_MODULE_ELLSWIFT "Enable ElligatorSwift module." ON)
# Processing must be done in a topological sorting of the dependency graph
# (dependent module first).
if(SECP256K1_ENABLE_MODULE_ELLSWIFT)
add_compile_definitions(ENABLE_MODULE_ELLSWIFT=1)
endif()
if(SECP256K1_ENABLE_MODULE_SCHNORRSIG)
if(DEFINED SECP256K1_ENABLE_MODULE_EXTRAKEYS AND NOT SECP256K1_ENABLE_MODULE_EXTRAKEYS)
message(FATAL_ERROR "Module dependency error: You have disabled the extrakeys module explicitly, but it is required by the schnorrsig module.")
endif()
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()
if(SECP256K1_ENABLE_MODULE_RECOVERY)
add_compile_definitions(ENABLE_MODULE_RECOVERY=1)
endif()
if(SECP256K1_ENABLE_MODULE_ECDH)
add_compile_definitions(ENABLE_MODULE_ECDH=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_KB "AUTO" CACHE STRING "The size of the precomputed table for signing in multiples of 1024 bytes (on typical platforms). Larger values result in possibly better signing or key generation performance at the cost of a larger table. Valid choices are 2, 22, 86. \"AUTO\" is a reasonable setting for desktop machines (currently 22). [default=AUTO]")
set_property(CACHE SECP256K1_ECMULT_GEN_KB PROPERTY STRINGS "AUTO" 2 22 86)
check_string_option_value(SECP256K1_ECMULT_GEN_KB)
if(SECP256K1_ECMULT_GEN_KB STREQUAL "AUTO")
set(SECP256K1_ECMULT_GEN_KB 22)
endif()
if(SECP256K1_ECMULT_GEN_KB EQUAL 2)
add_compile_definitions(COMB_BLOCKS=2)
add_compile_definitions(COMB_TEETH=5)
elseif(SECP256K1_ECMULT_GEN_KB EQUAL 22)
add_compile_definitions(COMB_BLOCKS=11)
add_compile_definitions(COMB_TEETH=6)
elseif(SECP256K1_ECMULT_GEN_KB EQUAL 86)
add_compile_definitions(COMB_BLOCKS=43)
add_compile_definitions(COMB_TEETH=6)
endif()
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()
set(SECP256K1_LATE_CFLAGS "" CACHE STRING "Compiler flags that are added to the command line after all other flags added by the build system.")
include(AllTargetsCompileOptions)
add_subdirectory(src)
all_targets_compile_options(src "${SECP256K1_LATE_CFLAGS}")
if(SECP256K1_BUILD_EXAMPLES)
add_subdirectory(examples)
all_targets_compile_options(examples "${SECP256K1_LATE_CFLAGS}")
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 table size ............... ${SECP256K1_ECMULT_GEN_KB} KiB")
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()
if(SECP256K1_LATE_CFLAGS)
message("SECP256K1_LATE_CFLAGS ................. ${SECP256K1_LATE_CFLAGS}")
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()
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