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libmdbx/cmake/compiler.cmake

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CMake
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## Copyright (c) 2010-2024 Леонид Юрьев aka Leonid Yuriev <leo@yuriev.ru>
## SPDX-License-Identifier: Apache-2.0
if(CMAKE_VERSION VERSION_LESS 3.8.2)
cmake_minimum_required(VERSION 3.0.2)
elseif(CMAKE_VERSION VERSION_LESS 3.12)
cmake_minimum_required(VERSION 3.8.2)
else()
cmake_minimum_required(VERSION 3.12)
endif()
cmake_policy(PUSH)
cmake_policy(VERSION ${CMAKE_MINIMUM_REQUIRED_VERSION})
if(NOT CMAKE_VERSION VERSION_LESS 3.21)
cmake_policy(SET CMP0126 NEW)
endif()
if(NOT CMAKE_VERSION VERSION_LESS 3.17)
cmake_policy(SET CMP0102 NEW)
endif()
if(NOT CMAKE_VERSION VERSION_LESS 3.15)
cmake_policy(SET CMP0091 NEW)
endif()
if(NOT CMAKE_VERSION VERSION_LESS 3.13)
cmake_policy(SET CMP0077 NEW)
endif()
if(NOT CMAKE_VERSION VERSION_LESS 3.12)
cmake_policy(SET CMP0075 NEW)
endif()
if(NOT CMAKE_VERSION VERSION_LESS 3.9)
cmake_policy(SET CMP0068 NEW)
cmake_policy(SET CMP0069 NEW)
endif()
if(CMAKE_VERSION MATCHES ".*MSVC.*" AND CMAKE_VERSION VERSION_LESS 3.16)
message(FATAL_ERROR "CMake from MSVC kit is unfit! "
"Please use MSVC2019 with modern CMake the original CMake from https://cmake.org/download/")
endif()
if(NOT (CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED))
message(FATAL_ERROR "This module required C or C++ to be enabled")
endif()
if(CMAKE_CXX_COMPILER_LOADED)
include(CheckCXXSourceRuns)
include(CheckCXXSourceCompiles)
include(CheckCXXCompilerFlag)
endif()
if(CMAKE_C_COMPILER_LOADED)
include(CheckCSourceRuns)
include(CheckCSourceCompiles)
include(CheckCCompilerFlag)
endif()
include(CMakeDependentOption)
include(CheckLibraryExists)
include(CheckIncludeFiles)
# Check if the same compile family is used for both C and CXX
if(CMAKE_C_COMPILER_LOADED AND CMAKE_CXX_COMPILER_LOADED AND
NOT (CMAKE_C_COMPILER_ID STREQUAL CMAKE_CXX_COMPILER_ID))
message(WARNING "CMAKE_C_COMPILER_ID (${CMAKE_C_COMPILER_ID}) is different "
"from CMAKE_CXX_COMPILER_ID (${CMAKE_CXX_COMPILER_ID}). "
"The final binary may be unusable.")
endif()
if(CMAKE_CXX_COMPILER_LOADED)
set(CMAKE_PRIMARY_LANG "CXX")
else()
set(CMAKE_PRIMARY_LANG "C")
endif()
macro(check_compiler_flag flag variable)
if(CMAKE_CXX_COMPILER_LOADED)
check_cxx_compiler_flag(${flag} ${variable})
else()
check_c_compiler_flag(${flag} ${variable})
endif()
endmacro(check_compiler_flag)
# We support building with Clang and gcc. First check
# what we're using for build.
if(CMAKE_C_COMPILER_LOADED AND CMAKE_C_COMPILER_ID MATCHES ".*[Cc][Ll][Aa][Nn][Gg].*")
set(CMAKE_COMPILER_IS_CLANG ON)
set(CMAKE_COMPILER_IS_GNUCC OFF)
endif()
if(CMAKE_CXX_COMPILER_LOADED AND CMAKE_CXX_COMPILER_ID MATCHES ".*[Cc][Ll][Aa][Nn][Gg].*")
set(CMAKE_COMPILER_IS_CLANG ON)
set(CMAKE_COMPILER_IS_GNUCXX OFF)
endif()
if(CMAKE_C_COMPILER_LOADED)
# Check for Elbrus lcc
execute_process(COMMAND ${CMAKE_C_COMPILER} --version
OUTPUT_VARIABLE tmp_lcc_probe_version
RESULT_VARIABLE tmp_lcc_probe_result ERROR_QUIET)
if(tmp_lcc_probe_result EQUAL 0)
string(FIND "${tmp_lcc_probe_version}" "lcc:" tmp_lcc_marker)
string(FIND "${tmp_lcc_probe_version}" ":e2k-" tmp_e2k_marker)
if(tmp_lcc_marker GREATER -1 AND tmp_e2k_marker GREATER tmp_lcc_marker)
execute_process(COMMAND ${CMAKE_C_COMPILER} -print-version
OUTPUT_VARIABLE CMAKE_C_COMPILER_VERSION
RESULT_VARIABLE tmp_lcc_probe_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
set(CMAKE_COMPILER_IS_ELBRUSC ON)
set(CMAKE_C_COMPILER_ID "Elbrus")
message(STATUS "Detected Elbrus C compiler ${CMAKE_C_COMPILER_VERSION}")
else()
set(CMAKE_COMPILER_IS_ELBRUSC OFF)
endif()
unset(tmp_lcc_marker)
unset(tmp_e2k_marker)
endif()
unset(tmp_lcc_probe_version)
unset(tmp_lcc_probe_result)
endif()
if(CMAKE_CXX_COMPILER_LOADED)
# Check for Elbrus l++
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
OUTPUT_VARIABLE tmp_lxx_probe_version
RESULT_VARIABLE tmp_lxx_probe_result ERROR_QUIET)
if(tmp_lxx_probe_result EQUAL 0)
string(FIND "${tmp_lxx_probe_version}" "lcc:" tmp_lcc_marker)
string(FIND "${tmp_lxx_probe_version}" ":e2k-" tmp_e2k_marker)
if(tmp_lcc_marker GREATER -1 AND tmp_e2k_marker GREATER tmp_lcc_marker)
execute_process(COMMAND ${CMAKE_CXX_COMPILER} -print-version
OUTPUT_VARIABLE CMAKE_CXX_COMPILER_VERSION
RESULT_VARIABLE tmp_lxx_probe_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
set(CMAKE_COMPILER_IS_ELBRUSCXX ON)
set(CMAKE_CXX_COMPILER_ID "Elbrus")
message(STATUS "Detected Elbrus C++ compiler ${CMAKE_CXX_COMPILER_VERSION}")
else()
set(CMAKE_COMPILER_IS_ELBRUSCXX OFF)
endif()
unset(tmp_lcc_marker)
unset(tmp_e2k_marker)
endif()
unset(tmp_lxx_probe_version)
unset(tmp_lxx_probe_result)
endif()
# Hard coding the compiler version is ugly from cmake POV, but
# at least gives user a friendly error message. The most critical
# demand for C++ compiler is support of C++11 lambdas, added
# only in version 4.5 https://gcc.gnu.org/projects/cxx0x.html
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5
AND NOT CMAKE_COMPILER_IS_ELBRUSC)
message(FATAL_ERROR "
Your GCC version is ${CMAKE_C_COMPILER_VERSION}, please update")
endif()
endif()
if(CMAKE_COMPILER_IS_GNUCXX)
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.5
AND NOT CMAKE_COMPILER_IS_ELBRUSCXX)
message(FATAL_ERROR "
Your G++ version is ${CMAKE_CXX_COMPILER_VERSION}, please update")
endif()
endif()
if(CMAKE_CL_64)
set(MSVC64 1)
endif()
if(WIN32 AND CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG})
execute_process(COMMAND ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} -dumpmachine
OUTPUT_VARIABLE __GCC_TARGET_MACHINE
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(__GCC_TARGET_MACHINE MATCHES "amd64|x86_64|AMD64")
set(MINGW64 1)
endif()
unset(__GCC_TARGET_MACHINE)
endif()
if(NOT DEFINED IOS)
if(APPLE AND (CMAKE_SYSTEM_NAME STREQUAL "iOS"
OR DEFINED CMAKE_IOS_DEVELOPER_ROOT
OR DEFINED IOS_PLATFORM OR DEFINED IOS_ARCH))
set(IOS TRUE)
else()
set(IOS FALSE)
endif()
endif()
if(NOT DEFINED CMAKE_TARGET_BITNESS)
if (CMAKE_SIZEOF_VOID_P LESS 4)
set(CMAKE_TARGET_BITNESS 16)
elseif (CMAKE_SIZEOF_VOID_P LESS 8)
set(CMAKE_TARGET_BITNESS 32)
else()
set(CMAKE_TARGET_BITNESS 64)
endif()
endif()
if(NOT CMAKE_SYSTEM_ARCH)
if(CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_ARCHITECTURE_ID)
string(TOLOWER "${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_ARCHITECTURE_ID}" CMAKE_SYSTEM_ARCH)
if(CMAKE_SYSTEM_ARCH STREQUAL "x86")
set(X86_32 TRUE)
elseif(CMAKE_SYSTEM_ARCH STREQUAL "x86_64" OR CMAKE_SYSTEM_ARCH STREQUAL "x64")
set(X86_64 TRUE)
set(CMAKE_SYSTEM_ARCH "x86_64")
elseif(CMAKE_SYSTEM_ARCH MATCHES "^(aarch.*|arm.*)")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(AARCH64 TRUE)
else()
set(ARM32 TRUE)
endif()
endif()
elseif(CMAKE_ANDROID_ARCH_ABI)
set(CMAKE_SYSTEM_ARCH "${CMAKE_ANDROID_ARCH_ABI}")
if(CMAKE_SYSTEM_ARCH STREQUAL "x86")
set(X86_32 TRUE)
elseif(CMAKE_SYSTEM_ARCH STREQUAL "x86_64")
set(X86_64 TRUE)
elseif(CMAKE_SYSTEM_ARCH MATCHES "^(aarch.*|AARCH.*|arm.*|ARM.*)")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(AARCH64 TRUE)
else()
set(ARM32 TRUE)
endif()
elseif(CMAKE_SYSTEM_ARCH MATCHES "^(mips|MIPS).*")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(MIPS64 TRUE)
else()
set(MIPS32 TRUE)
endif()
endif()
elseif(CMAKE_COMPILER_IS_ELBRUSC OR CMAKE_COMPILER_IS_ELBRUSCXX
OR CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_ID STREQUAL "LCC"
OR CMAKE_SYSTEM_PROCESSOR MATCHES "e2k.*|E2K.*|elbrus.*|ELBRUS.*")
set(E2K TRUE)
set(CMAKE_SYSTEM_ARCH "Elbrus")
elseif(MSVC64 OR MINGW64 OR MINGW OR (MSVC AND NOT CMAKE_CROSSCOMPILING))
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(X86_64 TRUE)
set(CMAKE_SYSTEM_ARCH "x86_64")
else()
set(X86_32 TRUE)
set(CMAKE_SYSTEM_ARCH "x86")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|[xXiI]86_64.*|AMD64.*|[iI][3-6]86.*|[xXiI]86.*")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(X86_64 TRUE)
set(CMAKE_SYSTEM_ARCH "x86_64")
else()
set(X86_32 TRUE)
set(CMAKE_SYSTEM_ARCH "x86")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch.*|AARCH.*|arm.*|ARM.*)")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(AARCH64 TRUE)
set(CMAKE_SYSTEM_ARCH "ARM64")
else()
set(ARM32 TRUE)
set(CMAKE_SYSTEM_ARCH "ARM")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc).*")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(PPC64 TRUE)
set(CMAKE_SYSTEM_ARCH "PPC64")
else()
set(PPC32 TRUE)
set(CMAKE_SYSTEM_ARCH "PPC")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(mips|MIPS).*")
if(CMAKE_TARGET_BITNESS EQUAL 64)
set(MIPS64 TRUE)
set(CMAKE_SYSTEM_ARCH "MIPS64")
else()
set(MIPS32 TRUE)
set(CMAKE_SYSTEM_ARCH "MIPS")
endif()
endif()
endif()
if(CMAKE_C_COMPILER_LOADED AND NOT CMAKE_C_COMPILER_ARCHITECTURE_ID)
set(CMAKE_C_COMPILER_ARCHITECTURE_ID "${CMAKE_SYSTEM_ARCH}")
endif()
if(CMAKE_CXX_COMPILER_LOADED AND NOT CMAKE_CXX_COMPILER_ARCHITECTURE_ID)
set(CMAKE_CXX_COMPILER_ARCHITECTURE_ID "${CMAKE_SYSTEM_ARCH}")
endif()
if(NOT CMAKE_HOST_ARCH)
if(CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE)
set(CMAKE_HOST_ARCH "${CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE}")
elseif(CMAKE_HOST_PROCESSOR MATCHES "e2k.*|E2K.*|elbrus.*|ELBRUS.*")
set(CMAKE_HOST_ARCH "Elbrus")
elseif(CMAKE_HOST_PROCESSOR MATCHES "amd64.*|[xXiI]86_64.*|AMD64.*")
set(CMAKE_HOST_ARCH "x86_64")
elseif(CMAKE_HOST_PROCESSOR MATCHES "[iI][3-6]86.*|[xXiI]86.*")
set(CMAKE_HOST_ARCH "x86")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*|ARM64.*)")
set(CMAKE_HOST_ARCH "ARM64")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(arm.*|ARM.*)")
set(CMAKE_HOST_ARCH "ARM")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(powerpc|ppc)64.*")
set(CMAKE_HOST_ARCH "PPC64")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(powerpc|ppc).*")
set(CMAKE_HOST_ARCH "PPC")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(mips|MIPS)64.*")
set(CMAKE_HOST_ARCH "MIPS64")
elseif(CMAKE_HOST_PROCESSOR MATCHES "^(mips|MIPS).*")
set(CMAKE_HOST_ARCH "MIPS")
else()
set(CMAKE_HOST_ARCH "${CMAKE_HOST_SYSTEM_PROCESSOR}")
endif()
endif()
if(NOT DEFINED CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET)
if(CMAKE_CROSSCOMPILING AND CMAKE_CROSSCOMPILING_EMULATOR)
set(CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET TRUE)
elseif(CMAKE_CROSSCOMPILING AND NOT CMAKE_CROSSCOMPILING_EMULATOR)
set(CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET FALSE)
elseif(CMAKE_SYSTEM_NAME STREQUAL CMAKE_HOST_SYSTEM_NAME
AND ((CMAKE_SYSTEM_PROCESSOR STREQUAL CMAKE_HOST_PROCESSOR)
OR (CMAKE_SYSTEM_ARCH STREQUAL CMAKE_HOST_ARCH)
OR (WIN32 AND CMAKE_HOST_WIN32 AND X86_32 AND CMAKE_HOST_ARCH STREQUAL "x86_64")))
set(CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET TRUE)
message(STATUS
"Assume СAN RUN A BUILT EXECUTABLES,"
" since host (${CMAKE_HOST_SYSTEM_NAME}-${CMAKE_HOST_ARCH})"
" match target (${CMAKE_SYSTEM_NAME}-${CMAKE_SYSTEM_ARCH})")
else()
if(CMAKE_C_COMPILER_LOADED)
include(CheckCSourceRuns)
check_c_source_runs("int main(void) { return 0; }" CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET)
elseif(CMAKE_CXX_COMPILER_LOADED)
include(CheckCXXSourceRuns)
check_cxx_source_runs("int main(void) { return 0; }" CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET)
endif()
if(NOT CMAKE_HOST_CAN_RUN_EXECUTABLES_BUILT_FOR_TARGET)
message(STATUS "Force CMAKE_CROSSCOMPILING to TRUE")
set(CMAKE_CROSSCOMPILING TRUE)
endif()
endif()
endif()
if(MSVC)
check_compiler_flag("/WX" CC_HAS_WERROR)
check_compiler_flag("/fsanitize=address" CC_HAS_ASAN)
check_compiler_flag("/fsanitize=undefined" CC_HAS_UBSAN)
else()
#
# GCC started to warn for unused result starting from 4.2, and
# this is when it introduced -Wno-unused-result
# GCC can also be built on top of llvm runtime (on mac).
check_compiler_flag("-Wno-unknown-pragmas" CC_HAS_WNO_UNKNOWN_PRAGMAS)
check_compiler_flag("-Wextra" CC_HAS_WEXTRA)
check_compiler_flag("-Werror" CC_HAS_WERROR)
check_compiler_flag("-fexceptions" CC_HAS_FEXCEPTIONS)
check_compiler_flag("-fno-semantic-interposition" CC_HAS_FNO_SEMANTIC_INTERPOSITION)
if(CMAKE_CXX_COMPILER_LOADED)
check_cxx_compiler_flag("-fcxx-exceptions" CC_HAS_FCXX_EXCEPTIONS)
endif()
check_compiler_flag("-funwind-tables" CC_HAS_FUNWIND_TABLES)
check_compiler_flag("-fno-omit-frame-pointer" CC_HAS_FNO_OMIT_FRAME_POINTER)
check_compiler_flag("-fno-common" CC_HAS_FNO_COMMON)
check_compiler_flag("-ggdb" CC_HAS_GGDB)
check_compiler_flag("-fvisibility=hidden" CC_HAS_VISIBILITY)
check_compiler_flag("-march=native" CC_HAS_ARCH_NATIVE)
check_compiler_flag("-Og" CC_HAS_DEBUG_FRIENDLY_OPTIMIZATION)
check_compiler_flag("-Wall" CC_HAS_WALL)
check_compiler_flag("-Ominimal" CC_HAS_OMINIMAL)
check_compiler_flag("-ffunction-sections -fdata-sections" CC_HAS_SECTIONS)
check_compiler_flag("-ffast-math" CC_HAS_FASTMATH)
check_compiler_flag("-Wno-attributes" CC_HAS_WNO_ATTRIBUTES)
# Check for an omp support
set(CMAKE_REQUIRED_FLAGS "-fopenmp -Werror")
if(CMAKE_CXX_COMPILER_LOADED)
check_cxx_source_compiles("int main(void) {
#pragma omp for
for(int i = 0, j = 0; i != 42; i = 1 + i * 12345) j += i % 43;
return j;
}" HAVE_OPENMP)
else()
check_c_source_compiles("int main(void) {
#pragma omp for
for(int i = 0, j = 0; i != 42; i = 1 + i * 12345) j += i % 43;
return j;
}" HAVE_OPENMP)
endif()
set(CMAKE_REQUIRED_FLAGS "")
endif()
# Crutch for old C++ compilers and/or CMake to enabling C++11
if(CMAKE_CXX_COMPILER_LOADED)
list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_11 HAS_CXX11)
if(HAS_CXX11 LESS 0)
if(MSVC)
check_cxx_compiler_flag("/std:c++11" CXX_FALLBACK_11)
else()
check_cxx_compiler_flag("-std=gnu++11" CXX_FALLBACK_GNU11)
if(NOT CXX_FALLBACK_GNU11)
check_cxx_compiler_flag("-std=c++11" CXX_FALLBACK_11)
endif()
endif()
endif()
endif()
# Crutch for mad C compilers and/or CMake to enabling C11
if(CMAKE_C_COMPILER_LOADED)
list(FIND CMAKE_C_COMPILE_FEATURES c_std_11 HAS_C11)
if(HAS_C11 LESS 0)
if(MSVC)
check_c_compiler_flag("/std:c11" C_FALLBACK_11)
else()
check_c_compiler_flag("-std=gnu11" C_FALLBACK_GNU11)
if(NOT C_FALLBACK_GNU11)
check_c_compiler_flag("-std=c11" C_FALLBACK_11)
endif()
endif()
endif()
endif()
# Check for LTO support by GCC
if(CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG} AND NOT CMAKE_COMPILER_IS_ELBRUSC AND NOT CMAKE_COMPILER_IS_ELBRUSCXX)
unset(gcc_collect)
unset(gcc_lto_wrapper)
if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 4.7)
execute_process(COMMAND ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} -v
OUTPUT_VARIABLE gcc_info_v ERROR_VARIABLE gcc_info_v)
string(REGEX MATCH "^(.+\nCOLLECT_GCC=)([^ \n]+)(\n.+)$" gcc_collect_valid ${gcc_info_v})
if(gcc_collect_valid)
string(REGEX REPLACE "^(.+\nCOLLECT_GCC=)([^ \n]+)(\n.+)$" "\\2" gcc_collect ${gcc_info_v})
endif()
string(REGEX MATCH "^(.+\nCOLLECT_LTO_WRAPPER=)([^ \n]+/lto-wrapper)(\n.+)$" gcc_lto_wrapper_valid ${gcc_info_v})
if(gcc_lto_wrapper_valid)
string(REGEX REPLACE "^(.+\nCOLLECT_LTO_WRAPPER=)([^ \n]+/lto-wrapper)(\n.+)$" "\\2" gcc_lto_wrapper ${gcc_info_v})
endif()
set(gcc_suffix "")
if(gcc_collect_valid AND gcc_collect)
string(REGEX MATCH "^(.*(cc|\\+\\+))(-.+)$" gcc_suffix_valid ${gcc_collect})
if(gcc_suffix_valid)
string(REGEX REPLACE "^(.*(cc|\\+\\+))(-.+)$" "\\3" gcc_suffix ${gcc_collect})
endif()
endif()
get_filename_component(gcc_dir ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} DIRECTORY)
if(NOT CMAKE_GCC_AR)
find_program(CMAKE_GCC_AR NAMES "gcc${gcc_suffix}-ar" "gcc-ar${gcc_suffix}" PATHS "${gcc_dir}" NO_DEFAULT_PATH)
endif()
if(NOT CMAKE_GCC_NM)
find_program(CMAKE_GCC_NM NAMES "gcc${gcc_suffix}-nm" "gcc-nm${gcc_suffix}" PATHS "${gcc_dir}" NO_DEFAULT_PATH)
endif()
if(NOT CMAKE_GCC_RANLIB)
find_program(CMAKE_GCC_RANLIB NAMES "gcc${gcc_suffix}-ranlib" "gcc-ranlib${gcc_suffix}" PATHS "${gcc_dir}" NO_DEFAULT_PATH)
endif()
unset(gcc_dir)
unset(gcc_suffix_valid)
unset(gcc_suffix)
unset(gcc_lto_wrapper_valid)
unset(gcc_collect_valid)
unset(gcc_collect)
unset(gcc_info_v)
endif()
if(CMAKE_GCC_AR AND CMAKE_GCC_NM AND CMAKE_GCC_RANLIB AND gcc_lto_wrapper)
message(STATUS "Found GCC's LTO toolset: ${gcc_lto_wrapper}, ${CMAKE_GCC_AR}, ${CMAKE_GCC_RANLIB}")
set(GCC_LTO_CFLAGS "-flto -fno-fat-lto-objects -fuse-linker-plugin")
set(GCC_LTO_AVAILABLE TRUE)
message(STATUS "Link-Time Optimization by GCC is available")
else()
set(GCC_LTO_AVAILABLE FALSE)
message(STATUS "Link-Time Optimization by GCC is NOT available")
endif()
unset(gcc_lto_wrapper)
endif()
# check for LTO by MSVC
if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG)
if(NOT MSVC_VERSION LESS 1600)
set(MSVC_LTO_AVAILABLE TRUE)
message(STATUS "Link-Time Optimization by MSVC is available")
else()
set(MSVC_LTO_AVAILABLE FALSE)
message(STATUS "Link-Time Optimization by MSVC is NOT available")
endif()
endif()
# Check for LTO support by CLANG
if(CMAKE_COMPILER_IS_CLANG)
if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 3.5)
execute_process(COMMAND ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} -print-search-dirs
OUTPUT_VARIABLE clang_search_dirs RESULT_VARIABLE clang_probe_result ERROR_QUIET)
unset(clang_bindirs)
unset(clang_bindirs_x)
unset(clang_libdirs)
unset(clang_libdirs_x)
if(clang_probe_result EQUAL 0)
string(REGEX MATCH "(^|\n.*)(.*programs: =)([^\n]+)((\n.*)|$)" regexp_valid ${clang_search_dirs})
if(regexp_valid)
string(REGEX REPLACE "(^|\n.*)(.*programs: =)([^\n]+)((\n.*)|$)" "\\3" list ${clang_search_dirs})
string(REPLACE ":" ";" list "${list}")
foreach(dir IN LISTS list)
get_filename_component(dir "${dir}" REALPATH)
if(dir MATCHES ".*llvm.*" OR dir MATCHES ".*clang.*")
list(APPEND clang_bindirs "${dir}")
else()
list(APPEND clang_bindirs_x "${dir}")
endif()
endforeach()
list(APPEND clang_bindirs "${clang_bindirs_x}")
list(REMOVE_DUPLICATES clang_bindirs)
endif()
string(REGEX MATCH "(^|\n.*)(.*libraries: =)([^\n]+)((\n.*)|$)" regexp_valid ${clang_search_dirs})
if(regexp_valid)
string(REGEX REPLACE "(^|\n.*)(.*libraries: =)([^\n]+)((\n.*)|$)" "\\3" list ${clang_search_dirs})
string(REPLACE ":" ";" list "${list}")
foreach(dir IN LISTS list)
get_filename_component(dir "${dir}" REALPATH)
if(dir MATCHES ".*llvm.*" OR dir MATCHES ".*clang.*")
list(APPEND clang_libdirs "${dir}")
else()
list(APPEND clang_libdirs_x "${dir}")
endif()
endforeach()
list(APPEND clang_libdirs "${clang_libdirs_x}")
list(REMOVE_DUPLICATES clang_libdirs)
endif()
else()
get_filename_component(clang_bindirs ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} DIRECTORY)
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
set(clang_libdirs ${clang_bindirs})
else()
get_filename_component(clang_libdirs "${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER}/../lib" REALPATH)
endif()
endif()
if(clang_bindirs AND clang_libdirs)
message(STATUS "Found CLANG/LLVM directories: ${clang_bindirs}, ${clang_libdirs}")
else()
message(STATUS "Could NOT find CLANG/LLVM directories (bin and/or lib).")
endif()
if(NOT CMAKE_CLANG_LD AND clang_bindirs)
find_program(CMAKE_CLANG_LD NAMES lld-link ld.lld "ld${CMAKE_TARGET_BITNESS}.lld" lld llvm-link llvm-ld PATHS ${clang_bindirs} NO_DEFAULT_PATH)
endif()
if(NOT CMAKE_CLANG_AR AND clang_bindirs)
find_program(CMAKE_CLANG_AR NAMES llvm-ar ar PATHS ${clang_bindirs} NO_DEFAULT_PATH)
endif()
if(NOT CMAKE_CLANG_NM AND clang_bindirs)
find_program(CMAKE_CLANG_NM NAMES llvm-nm nm PATHS ${clang_bindirs} NO_DEFAULT_PATH)
endif()
if(NOT CMAKE_CLANG_RANLIB AND clang_bindirs)
find_program(CMAKE_CLANG_RANLIB NAMES llvm-ranlib ranlib PATHS ${clang_bindirs} NO_DEFAULT_PATH)
endif()
set(clang_lto_plugin_name "LLVMgold${CMAKE_SHARED_LIBRARY_SUFFIX}")
if(NOT CMAKE_LD_GOLD AND clang_bindirs)
find_program(CMAKE_LD_GOLD NAMES ld.gold PATHS ${clang_bindirs})
endif()
if(NOT CLANG_LTO_PLUGIN AND clang_libdirs)
find_file(CLANG_LTO_PLUGIN ${clang_lto_plugin_name} PATHS ${clang_libdirs} NO_DEFAULT_PATH)
endif()
if(CLANG_LTO_PLUGIN)
message(STATUS "Found CLANG/LLVM's plugin for LTO: ${CLANG_LTO_PLUGIN}")
else()
message(STATUS "Could NOT find CLANG/LLVM's plugin (${clang_lto_plugin_name}) for LTO.")
endif()
if(CMAKE_CLANG_LD)
message(STATUS "Found CLANG/LLVM's linker for LTO: ${CMAKE_CLANG_LD}")
else()
message(STATUS "Could NOT find CLANG/LLVM's linker (lld, llvm-ld, llvm-link) for LTO.")
endif()
if(CMAKE_CLANG_AR AND CMAKE_CLANG_RANLIB AND CMAKE_CLANG_NM)
message(STATUS "Found CLANG/LLVM's binutils for LTO: ${CMAKE_CLANG_AR}, ${CMAKE_CLANG_RANLIB}, ${CMAKE_CLANG_NM}")
else()
message(STATUS "Could NOT find CLANG/LLVM's binutils (ar, ranlib, nm) for LTO.")
endif()
unset(clang_lto_plugin_name)
unset(clang_libdir)
unset(clang_bindir_valid)
unset(clang_bindir)
unset(clang_search_dirs)
endif()
if(CMAKE_CLANG_AR AND CMAKE_CLANG_NM AND CMAKE_CLANG_RANLIB
AND ((CLANG_LTO_PLUGIN AND CMAKE_LD_GOLD)
OR (CMAKE_CLANG_LD
AND NOT (CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux"
AND CMAKE_SYSTEM_NAME STREQUAL "Linux"))
OR APPLE))
if(ANDROID AND CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 12)
set(CLANG_LTO_AVAILABLE FALSE)
message(STATUS "Link-Time Optimization by CLANG/LLVM is available but unusable due https://reviews.llvm.org/D79919")
else()
set(CLANG_LTO_AVAILABLE TRUE)
message(STATUS "Link-Time Optimization by CLANG/LLVM is available")
endif()
elseif(CMAKE_TOOLCHAIN_FILE AND NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 7.0)
set(CLANG_LTO_AVAILABLE TRUE)
if(NOT CMAKE_CLANG_LD)
set(CMAKE_CLANG_LD ${CMAKE_LINKER})
endif()
if(NOT CMAKE_CLANG_AR)
set(CMAKE_CLANG_AR ${CMAKE_AR})
endif()
if(NOT CMAKE_CLANG_NM)
set(CMAKE_CLANG_NM ${CMAKE_NM})
endif()
if(NOT CMAKE_CLANG_RANLIB)
set(CMAKE_CLANG_RANLIB ${CMAKE_RANLIB})
endif()
message(STATUS "Assume Link-Time Optimization by CLANG/LLVM is available via ${CMAKE_TOOLCHAIN_FILE}")
else()
set(CLANG_LTO_AVAILABLE FALSE)
message(STATUS "Link-Time Optimization by CLANG/LLVM is NOT available")
endif()
endif()
# Perform build type specific configuration.
option(ENABLE_BACKTRACE "Enable output of fiber backtrace information in 'show
fiber' administrative command. Only works on x86 architectures, if compiled
with gcc. If GNU binutils and binutils-dev libraries are installed, backtrace
is output with resolved function (symbol) names. Otherwise only frame
addresses are printed." OFF)
set(HAVE_BFD FALSE)
if(ENABLE_BACKTRACE)
if(NOT (X86_32 OR X86_64) OR NOT CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG})
# We only know this option to work with gcc
message(FATAL_ERROR "ENABLE_BACKTRACE option is set but the system
is not x86 based (${CMAKE_SYSTEM_PROCESSOR}) or the compiler
is not GNU GCC (${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER}).")
endif()
# Use GNU bfd if present.
find_library(BFD_LIBRARY NAMES libbfd.a)
if(BFD_LIBRARY)
check_library_exists(${BFD_LIBRARY} bfd_init "" HAVE_BFD_LIB)
endif()
find_library(IBERTY_LIBRARY NAMES libiberty.a)
if(IBERTY_LIBRARY)
check_library_exists(${IBERTY_LIBRARY} cplus_demangle "" HAVE_IBERTY_LIB)
endif()
set(CMAKE_REQUIRED_DEFINITIONS -DPACKAGE=${PACKAGE} -DPACKAGE_VERSION=${PACKAGE_VERSION})
check_include_files(bfd.h HAVE_BFD_H)
set(CMAKE_REQUIRED_DEFINITIONS)
find_package(ZLIB)
if(HAVE_BFD_LIB AND HAVE_BFD_H AND HAVE_IBERTY_LIB AND ZLIB_FOUND)
set(HAVE_BFD ON)
set(BFD_LIBRARIES ${BFD_LIBRARY} ${IBERTY_LIBRARY} ${ZLIB_LIBRARIES})
find_package_message(BFD_LIBRARIES "Found libbfd and dependencies"
${BFD_LIBRARIES})
if(TARGET_OS_FREEBSD AND NOT TARGET_OS_DEBIAN_FREEBSD)
set(BFD_LIBRARIES ${BFD_LIBRARIES} iconv)
endif()
endif()
endif()
macro(setup_compile_flags)
# save initial C/CXX flags
if(NOT INITIAL_CMAKE_FLAGS_SAVED)
if(CMAKE_CXX_COMPILER_LOADED)
set(INITIAL_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
endif()
if(CMAKE_C_COMPILER_LOADED)
set(INITIAL_CMAKE_C_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
endif()
set(INITIAL_CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
set(INITIAL_CMAKE_SHARED_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
set(INITIAL_CMAKE_STATIC_LINKER_FLAGS ${CMAKE_STATIC_LINKER_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
set(INITIAL_CMAKE_MODULE_LINKER_FLAGS ${CMAKE_MODULE_LINKER_FLAGS} CACHE STRING "Initial CMake's flags" FORCE)
set(INITIAL_CMAKE_FLAGS_SAVED TRUE CACHE INTERNAL "State of initial CMake's flags" FORCE)
endif()
# reset C/CXX flags
if(CMAKE_CXX_COMPILER_LOADED)
set(CXX_FLAGS ${INITIAL_CMAKE_CXX_FLAGS})
# Crutch for old C++ compilers and/or CMake to enabling C++11
if(CXX_FALLBACK_GNU11)
add_compile_flags("CXX" "-std=gnu++11")
elseif(CXX_FALLBACK_11)
add_compile_flags("CXX" "-std=c++11")
endif()
endif()
if(CMAKE_C_COMPILER_LOADED)
set(C_FLAGS ${INITIAL_CMAKE_C_FLAGS})
# Crutch for mad C compilers and/or CMake to enabling C11
if(C_FALLBACK_GNU11)
add_compile_flags("C" "-std=gnu11")
elseif(C_FALLBACK_11)
if(MSVC)
add_compile_flags("C" "/std:c11")
else()
add_compile_flags("C" "-std=c11")
endif()
endif()
endif()
set(EXE_LINKER_FLAGS ${INITIAL_CMAKE_EXE_LINKER_FLAGS})
set(SHARED_LINKER_FLAGS ${INITIAL_CMAKE_SHARED_LINKER_FLAGS})
set(STATIC_LINKER_FLAGS ${INITIAL_CMAKE_STATIC_LINKER_FLAGS})
set(MODULE_LINKER_FLAGS ${INITIAL_CMAKE_MODULE_LINKER_FLAGS})
if(CC_HAS_FEXCEPTIONS)
add_compile_flags("C;CXX" "-fexceptions")
endif()
if(CC_HAS_FCXX_EXCEPTIONS)
add_compile_flags("CXX" "-fcxx-exceptions" "-frtti")
endif()
if(CC_HAS_FNO_SEMANTIC_INTERPOSITION AND NOT CMAKE_COMPILER_IS_CLANG)
add_compile_flags("C;CXX" "-fno-semantic-interposition")
endif()
if(MSVC)
# checks for /EHa or /clr options exists,
# i.e. is enabled structured async WinNT exceptions
string(REGEX MATCH "^(.* )*[-/]EHc*a( .*)*$" msvc_async_eh_enabled "${CXX_FLAGS}" "${C_FLAGS}")
string(REGEX MATCH "^(.* )*[-/]clr( .*)*$" msvc_clr_enabled "${CXX_FLAGS}" "${C_FLAGS}")
# remote any /EH? options
string(REGEX REPLACE "( *[-/]-*EH[csa]+ *)+" "" CXX_FLAGS "${CXX_FLAGS}")
string(REGEX REPLACE "( *[-/]-*EH[csa]+ *)+" "" C_FLAGS "${C_FLAGS}")
if (msvc_clr_enabled STREQUAL "")
if(NOT msvc_async_eh_enabled STREQUAL "")
add_compile_flags("C;CXX" "/EHa")
else()
add_compile_flags("C;CXX" "/EHsc")
endif()
endif()
endif(MSVC)
if(CC_HAS_WNO_ATTRIBUTES AND CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG}
AND CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 9)
# GCC < 9.x generates false-positive warnings for optimization attributes
add_compile_flags("C;CXX" "-Wno-attributes")
if(LTO_ENABLED)
add_compile_flags("C;CXX" "-Wno-lto-type-mismatch")
endif()
endif()
# In C a global variable without a storage specifier (static/extern) and
# without an initialiser is called a ’tentative definition’. The
# language permits multiple tentative definitions in the single
# translation unit; i.e. int foo; int foo; is perfectly ok. GNU
# toolchain goes even further, allowing multiple tentative definitions
# in *different* translation units. Internally, variables introduced via
# tentative definitions are implemented as ‘common’ symbols. Linker
# permits multiple definitions if they are common symbols, and it picks
# one arbitrarily for inclusion in the binary being linked.
#
# -fno-common forces GNU toolchain to behave in a more
# standard-conformant way in respect to tentative definitions and it
# prevents common symbols generation. Since we are a cross-platform
# project it really makes sense. There are toolchains that don’t
# implement GNU style handling of the tentative definitions and there
# are platforms lacking proper support for common symbols (osx).
if(CC_HAS_FNO_COMMON)
add_compile_flags("C;CXX" "-fno-common")
endif()
if(CC_HAS_GGDB)
add_compile_flags("C;CXX" "-ggdb")
endif()
if(CC_HAS_WNO_UNKNOWN_PRAGMAS AND NOT HAVE_OPENMP)
add_compile_flags("C;CXX" "-Wno-unknown-pragmas")
endif()
if(CC_HAS_SECTIONS)
add_compile_flags("C;CXX" "-ffunction-sections" "-fdata-sections")
elseif(MSVC)
add_compile_flags("C;CXX" "/Gy")
endif()
# We must set -fno-omit-frame-pointer here, since we rely
# on frame pointer when getting a backtrace, and it must
# be used consistently across all object files.
# The same reasoning applies to -fno-stack-protector switch.
if(ENABLE_BACKTRACE)
if(CC_HAS_FNO_OMIT_FRAME_POINTER)
add_compile_flags("C;CXX" "-fno-omit-frame-pointer")
endif()
endif()
if(MSVC)
if(MSVC_VERSION LESS 1900)
message(FATAL_ERROR "At least \"Microsoft C/C++ Compiler\" version 19.0.24234.1 (Visual Studio 2015 Update 3) is required.")
endif()
if(NOT MSVC_VERSION LESS 1910)
add_compile_flags("CXX" "/Zc:__cplusplus")
endif()
remove_compile_flag("C;CXX" "/W3")
add_compile_flags("C;CXX" "/W4 /utf-8 /bigobj")
else()
if(CC_HAS_WALL)
add_compile_flags("C;CXX" "-Wall")
endif()
if(CC_HAS_WEXTRA)
add_compile_flags("C;CXX" "-Wextra")
endif()
endif()
add_definitions("-D__STDC_FORMAT_MACROS=1")
add_definitions("-D__STDC_LIMIT_MACROS=1")
add_definitions("-D__STDC_CONSTANT_MACROS=1")
add_definitions("-D_HAS_EXCEPTIONS=1")
# Only add -Werror if it's a debug build, done by developers.
# Release builds should not cause extra trouble.
if(CC_HAS_WERROR AND (CI OR CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE STREQUAL "Debug"))
if(MSVC)
add_compile_flags("C;CXX" "/WX")
elseif(CMAKE_COMPILER_IS_CLANG)
if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6)
add_compile_flags("C;CXX" "-Werror")
endif()
elseif(CMAKE_COMPILER_IS_GNUCC)
if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6)
add_compile_flags("C;CXX" "-Werror")
endif()
else()
add_compile_flags("C;CXX" "-Werror")
endif()
endif()
if(CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG}
AND CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 5)
# G++ bug. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31488
add_compile_flags("CXX" "-Wno-invalid-offsetof")
endif()
if(MINGW)
# Disable junk MINGW's warnings that issued due to incompatibilities
# and shortcomings of MINGW,
# since the code is checked by builds with GCC, CLANG and MSVC.
add_compile_flags("C;CXX" "-Wno-format-extra-args" "-Wno-format" "-Wno-cast-function-type" "-Wno-implicit-fallthrough")
endif()
if(ENABLE_ASAN)
if(NOT MSVC)
add_compile_flags("C;CXX" "-fsanitize=address")
else()
add_compile_flags("C;CXX" "/fsanitize=address")
endif()
add_definitions(-DASAN_ENABLED=1)
endif()
if(ENABLE_UBSAN)
if(NOT MSVC)
add_compile_flags("C;CXX" "-fsanitize=undefined" "-fsanitize-undefined-trap-on-error")
else()
add_compile_flags("C;CXX" "/fsanitize=undefined")
endif()
add_definitions(-DUBSAN_ENABLED=1)
endif()
if(ENABLE_GCOV)
if(NOT HAVE_GCOV)
message(FATAL_ERROR "ENABLE_GCOV option requested but gcov library is not found")
endif()
add_compile_flags("C;CXX" "-fprofile-arcs" "-ftest-coverage")
set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
# add_library(gcov SHARED IMPORTED)
endif()
if(ENABLE_GPROF)
add_compile_flags("C;CXX" "-pg")
endif()
if(CMAKE_COMPILER_IS_GNUCC AND LTO_ENABLED)
add_compile_flags("C;CXX" ${GCC_LTO_CFLAGS})
set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${GCC_LTO_CFLAGS} -fverbose-asm -fwhole-program")
set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${GCC_LTO_CFLAGS} -fverbose-asm")
set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${GCC_LTO_CFLAGS} -fverbose-asm")
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5)
# Pass the same optimization flags to the linker
set(compile_flags "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${compile_flags}")
set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${compile_flags}")
set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${compile_flags}")
unset(compile_flags)
else()
add_compile_flags("CXX" "-flto-odr-type-merging")
endif()
endif()
if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG AND LTO_ENABLED)
add_compile_flags("C;CXX" "/GL")
foreach(linkmode IN ITEMS EXE SHARED STATIC MODULE)
set(${linkmode}_LINKER_FLAGS "${${linkmode}_LINKER_FLAGS} /LTCG")
string(REGEX REPLACE "^(.*)(/INCREMENTAL)(:YES)?(:NO)?( ?.*)$" "\\1\\2:NO\\5" ${linkmode}_LINKER_FLAGS "${${linkmode}_LINKER_FLAGS}")
string(STRIP "${${linkmode}_LINKER_FLAGS}" ${linkmode}_LINKER_FLAGS)
foreach(config IN LISTS CMAKE_CONFIGURATION_TYPES ITEMS Release MinSizeRel RelWithDebInfo Debug)
string(TOUPPER "${config}" config_uppercase)
if(DEFINED "CMAKE_${linkmode}_LINKER_FLAGS_${config_uppercase}")
string(REGEX REPLACE "^(.*)(/INCREMENTAL)(:YES)?(:NO)?( ?.*)$" "\\1\\2:NO\\5" altered_flags "${CMAKE_${linkmode}_LINKER_FLAGS_${config_uppercase}}")
string(STRIP "${altered_flags}" altered_flags)
if(NOT "${altered_flags}" STREQUAL "${CMAKE_${linkmode}_LINKER_FLAGS_${config_uppercase}}")
set(CMAKE_${linkmode}_LINKER_FLAGS_${config_uppercase} "${altered_flags}" CACHE STRING "Altered: '/INCREMENTAL' removed for LTO" FORCE)
endif()
endif()
endforeach(config)
endforeach(linkmode)
unset(linkmode)
foreach(config IN LISTS CMAKE_CONFIGURATION_TYPES ITEMS Release MinSizeRel RelWithDebInfo)
foreach(lang IN ITEMS C CXX)
string(TOUPPER "${config}" config_uppercase)
if(DEFINED "CMAKE_${lang}_FLAGS_${config_uppercase}")
string(REPLACE "/O2" "/Ox" altered_flags "${CMAKE_${lang}_FLAGS_${config_uppercase}}")
if(NOT "${altered_flags}" STREQUAL "${CMAKE_${lang}_FLAGS_${config_uppercase}}")
set(CMAKE_${lang}_FLAGS_${config_uppercase} "${altered_flags}" CACHE STRING "Altered: '/O2' replaced by '/Ox' for LTO" FORCE)
endif()
endif()
unset(config_uppercase)
endforeach(lang)
endforeach(config)
unset(altered_flags)
unset(lang)
unset(config)
endif()
if(CMAKE_COMPILER_IS_CLANG AND OSX_ARCHITECTURES)
set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} -Wl,-keep_dwarf_unwind")
set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} -Wl,-keep_dwarf_unwind")
set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} -Wl,-keep_dwarf_unwind")
endif()
if(CMAKE_COMPILER_IS_CLANG AND LTO_ENABLED)
if(CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 3.9)
set(CLANG_LTO_FLAG "-flto")
else()
set(CLANG_LTO_FLAG "-flto=thin")
endif()
add_compile_flags("C;CXX" ${CLANG_LTO_FLAG})
if(NOT MSVC)
set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm -fwhole-program")
set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm")
set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm")
endif()
endif()
# push C/CXX flags into the cache
if(CMAKE_CXX_COMPILER_LOADED)
set(CMAKE_CXX_FLAGS ${CXX_FLAGS} CACHE STRING "Flags used by the C++ compiler during all build types" FORCE)
unset(CXX_FLAGS)
endif()
if(CMAKE_C_COMPILER_LOADED)
set(CMAKE_C_FLAGS ${C_FLAGS} CACHE STRING "Flags used by the C compiler during all build types" FORCE)
unset(C_FLAGS)
endif()
set(CMAKE_EXE_LINKER_FLAGS ${EXE_LINKER_FLAGS} CACHE STRING "Flags used by the linker" FORCE)
set(CMAKE_SHARED_LINKER_FLAGS ${SHARED_LINKER_FLAGS} CACHE STRING "Flags used by the linker during the creation of dll's" FORCE)
set(CMAKE_STATIC_LINKER_FLAGS ${STATIC_LINKER_FLAGS} CACHE STRING "Flags used by the linker during the creation of static libraries" FORCE)
set(CMAKE_MODULE_LINKER_FLAGS ${MODULE_LINKER_FLAGS} CACHE STRING "Flags used by the linker during the creation of modules" FORCE)
unset(EXE_LINKER_FLAGS)
unset(SHARED_LINKER_FLAGS)
unset(STATIC_LINKER_FLAGS)
unset(MODULE_LINKER_FLAGS)
endmacro(setup_compile_flags)
macro(probe_libcxx_filesystem)
if(CMAKE_CXX_COMPILER_LOADED AND NOT DEFINED LIBCXX_FILESYSTEM)
list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_11 HAS_CXX11)
if(NOT HAS_CXX11 LESS 0 OR CXX_FALLBACK_GNU11 OR CXX_FALLBACK_11)
include(CMakePushCheckState)
include(CheckCXXSourceCompiles)
cmake_push_check_state()
set(stdfs_probe_save_libraries ${CMAKE_REQUIRED_LIBRARIES})
set(stdfs_probe_save_flags ${CMAKE_REQUIRED_FLAGS})
set(stdfs_probe_flags ${CMAKE_REQUIRED_FLAGS})
set(stdfs_probe_save_link_options ${CMAKE_REQUIRED_LINK_OPTIONS})
unset(stdfs_probe_clear_cxx_standard)
if(NOT DEFINED CMAKE_CXX_STANDARD)
list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_14 HAS_CXX14)
list(FIND CMAKE_CXX_COMPILE_FEATURES cxx_std_17 HAS_CXX17)
if(NOT HAS_CXX17 LESS 0
AND NOT (CMAKE_COMPILER_IS_CLANG AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5))
set(CMAKE_CXX_STANDARD 17)
elseif(NOT HAS_CXX14 LESS 0)
set(CMAKE_CXX_STANDARD 14)
elseif(NOT HAS_CXX11 LESS 0)
set(CMAKE_CXX_STANDARD 11)
elseif(CXX_FALLBACK_GNU11)
set(stdfs_probe_flags ${stdfs_probe_flags} "-std=gnu++11")
else()
set(stdfs_probe_flags ${stdfs_probe_flags} "-std=c++11")
endif()
set(stdfs_probe_clear_cxx_standard ON)
endif()
if(CMAKE_COMPILER_IS_ELBRUSCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 1.25.23)
if(CMAKE_VERSION VERSION_LESS 3.14)
set(stdfs_probe_flags ${stdfs_probe_flags} "-Wl,--allow-multiple-definition")
else()
set(CMAKE_REQUIRED_LINK_OPTIONS ${stdfs_probe_save_link_options} "-Wl,--allow-multiple-definition")
endif()
endif()
set(CMAKE_REQUIRED_FLAGS ${stdfs_probe_flags})
set(stdfs_probe_code [[
#if defined(__SIZEOF_INT128__) && !defined(__GLIBCXX_TYPE_INT_N_0) && defined(__clang__) && __clang_major__ < 4
#define __GLIBCXX_BITSIZE_INT_N_0 128
#define __GLIBCXX_TYPE_INT_N_0 __int128
#endif
#ifndef __has_include
#define __has_include(header) (0)
#endif
#if __has_include(<version>)
#include <version>
#endif
#include <cstdlib>
#include <string>
#if defined(__cpp_lib_string_view) && __cpp_lib_string_view >= 201606L
#include <string_view>
#endif
#if defined(__cpp_lib_filesystem) && __cpp_lib_filesystem >= 201703L
#include <filesystem>
#else
#include <experimental/filesystem>
#endif
#if (defined(__cpp_lib_filesystem) && __cpp_lib_filesystem >= 201703L && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500) && (!defined(__IPHONE_OS_VERSION_MIN_REQUIRED) || __IPHONE_OS_VERSION_MIN_REQUIRED >= 130100))
namespace fs = ::std::filesystem;
#elif defined(__cpp_lib_experimental_filesystem) && __cpp_lib_experimental_filesystem >= 201406L
namespace fs = ::std::experimental::filesystem;
#elif (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500) || (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 130100)
#error "Select a newer target OSX/iOS to support C++17 std::filesystem"
#else
#error "No support for C++17 std::filesystem"
#endif
int main(int argc, const char*argv[]) {
std::string str(argv[0]);
fs::path probe(str);
if (argc != 1) throw fs::filesystem_error(std::string("fake"), std::error_code());
int r = fs::is_directory(probe.relative_path());
for (auto const& i : fs::directory_iterator(probe)) {
++r;
(void)i;
}
return r;
}
]])
set(LIBCXX_FILESYSTEM "")
check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_none)
if(LIBCXX_FILESYSTEM_none)
message(STATUS "No linking with additional library needed for std::filesystem")
else()
set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "stdc++fs")
check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_stdcxxfs)
if(LIBCXX_FILESYSTEM_stdcxxfs)
set(LIBCXX_FILESYSTEM "stdc++fs")
message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
else()
set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "c++fs")
check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_cxxfs)
if(LIBCXX_FILESYSTEM_cxxfs)
set(LIBCXX_FILESYSTEM "c++fs")
message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
else()
set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries} "c++experimental")
check_cxx_source_compiles("${stdfs_probe_code}" LIBCXX_FILESYSTEM_cxxexperimental)
if(LIBCXX_FILESYSTEM_cxxexperimental)
set(LIBCXX_FILESYSTEM "c++experimental")
message(STATUS "Linking with ${LIBCXX_FILESYSTEM} is required for std::filesystem")
else()
message(STATUS "No support for std::filesystem")
endif()
endif()
endif()
endif()
set(CMAKE_REQUIRED_LINK_OPTIONS ${stdfs_probe_save_link_options})
set(CMAKE_REQUIRED_FLAGS ${stdfs_probe_save_flags})
set(CMAKE_REQUIRED_LIBRARIES ${stdfs_probe_save_libraries})
if(stdfs_probe_clear_cxx_standard)
unset(CMAKE_CXX_STANDARD)
endif()
unset(stdfs_probe_clear_cxx_standard)
unset(stdfs_probe_save_link_options)
unset(stdfs_probe_save_flags)
unset(stdfs_probe_flags)
unset(stdfs_probe_save_libraries)
unset(stdfs_probe_code)
unset(stdfs_probe_rc)
cmake_pop_check_state()
endif()
endif()
endmacro(probe_libcxx_filesystem)
cmake_policy(POP)
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