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# Copyright Louis Dionne 2015
# Copyright Gonzalo Brito Gadeschi 2015
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#
# Setup compiler flags (more can be set on a per-target basis or in
# subdirectories)
# Compilation flags
include(CheckCXXCompilerFlag)
macro(ranges_append_flag testname flag)
# As -Wno-* flags do not lead to build failure when there are no other
# diagnostics, we check positive option to determine their applicability.
# Of course, we set the original flag that is requested in the parameters.
string(REGEX REPLACE "^-Wno-" "-W" alt ${flag})
check_cxx_compiler_flag(${alt} ${testname})
if (${testname})
add_compile_options(${flag})
endif()
endmacro()
function(cxx_standard_normalize cxx_standard return_value)
if("x${cxx_standard}" STREQUAL "x1y")
set( ${return_value} "14" PARENT_SCOPE )
elseif("x${cxx_standard}" STREQUAL "x1z")
set( ${return_value} "17" PARENT_SCOPE )
elseif("x${cxx_standard}" STREQUAL "xlatest" OR "x${cxx_standard}" STREQUAL "x2a")
set( ${return_value} "20" PARENT_SCOPE )
else()
set( ${return_value} "${cxx_standard}" PARENT_SCOPE )
endif()
endfunction()
function(cxx_standard_denormalize cxx_standard return_value)
if("x${cxx_standard}" STREQUAL "x17")
if (RANGES_CXX_COMPILER_CLANGCL OR RANGES_CXX_COMPILER_MSVC)
set( ${return_value} 17 PARENT_SCOPE )
else()
set( ${return_value} 1z PARENT_SCOPE )
endif()
elseif("x${cxx_standard}" STREQUAL "x20")
if (RANGES_CXX_COMPILER_CLANGCL OR RANGES_CXX_COMPILER_MSVC)
set( ${return_value} latest PARENT_SCOPE )
else()
set( ${return_value} 2a PARENT_SCOPE )
endif()
else()
set( ${return_value} ${cxx_standard} PARENT_SCOPE )
endif()
endfunction()
if(CMAKE_CXX_STANDARD)
if(NOT "x${RANGES_CXX_STD}" STREQUAL "xdefault")
# Normalize RANGES_CXX_STD
cxx_standard_normalize( ${RANGES_CXX_STD} ranges_cxx_std )
if(NOT "x${ranges_cxx_std}" STREQUAL "x${CMAKE_CXX_STANDARD}")
message(FATAL_ERROR "[range-v3]: Cannot specify both CMAKE_CXX_STANDARD and RANGES_CXX_STD, or they must match.")
endif()
else()
cxx_standard_denormalize(${CMAKE_CXX_STANDARD} RANGES_CXX_STD)
endif()
elseif("x${RANGES_CXX_STD}" STREQUAL "xdefault")
if (RANGES_CXX_COMPILER_CLANGCL OR RANGES_CXX_COMPILER_MSVC)
set(RANGES_CXX_STD 17)
else()
set(RANGES_CXX_STD 14)
endif()
endif()
# All compilation flags
# Language flag: version of the C++ standard to use
message(STATUS "[range-v3]: C++ std=${RANGES_CXX_STD}")
if (RANGES_CXX_COMPILER_CLANGCL OR RANGES_CXX_COMPILER_MSVC)
ranges_append_flag(RANGES_HAS_CXXSTDCOLON "/std:c++${RANGES_CXX_STD}")
set(RANGES_STD_FLAG "/std:c++${RANGES_CXX_STD}")
if (RANGES_CXX_COMPILER_CLANGCL)
# The MSVC STL before VS 2019v16.6 with Clang 10 requires -fms-compatibility in C++17 mode, and
# doesn't support C++20 mode at all. Let's drop this flag until AppVeyor updates to VS2016v16.6.
# ranges_append_flag(RANGES_HAS_FNO_MS_COMPATIBIILITY "-fno-ms-compatibility")
ranges_append_flag(RANGES_HAS_FNO_DELAYED_TEMPLATE_PARSING "-fno-delayed-template-parsing")
endif()
# Enable "normal" warnings and make them errors:
ranges_append_flag(RANGES_HAS_W3 /W3)
ranges_append_flag(RANGES_HAS_WX /WX)
else()
ranges_append_flag(RANGES_HAS_CXXSTD "-std=c++${RANGES_CXX_STD}")
set(RANGES_STD_FLAG "-std=c++${RANGES_CXX_STD}")
# Enable "normal" warnings and make them errors:
ranges_append_flag(RANGES_HAS_WALL -Wall)
ranges_append_flag(RANGES_HAS_WEXTRA -Wextra)
if (RANGES_ENABLE_WERROR)
ranges_append_flag(RANGES_HAS_WERROR -Werror)
endif()
endif()
if (RANGES_ENV_LINUX AND RANGES_CXX_COMPILER_CLANG)
# On linux libc++ re-exports the system math headers. The ones from libstdc++
# use the GCC __extern_always_inline intrinsic which is not supported by clang
# versions 3.6, 3.7, 3.8, 3.9, 4.0, and current trunk 5.0 (as of 2017.04.13).
#
# This works around it by replacing __extern_always_inline with inline using a
# macro:
ranges_append_flag(RANGES_HAS_D__EXTERN_ALWAYS_INLINE -D__extern_always_inline=inline)
endif()
# Deep integration support
if (RANGES_DEEP_STL_INTEGRATION)
if (RANGES_CXX_COMPILER_MSVC)
add_compile_options(/I "${PROJECT_SOURCE_DIR}/include/std")
add_compile_options(/I "${PROJECT_SOURCE_DIR}/include")
else()
add_compile_options(-isystem "${PROJECT_SOURCE_DIR}/include/std")
add_compile_options(-I "${PROJECT_SOURCE_DIR}/include")
endif()
add_compile_options(-DRANGES_DEEP_STL_INTEGRATION=1)
endif()
# Template diagnostic flags
ranges_append_flag(RANGES_HAS_FDIAGNOSTIC_SHOW_TEMPLATE_TREE -fdiagnostics-show-template-tree)
ranges_append_flag(RANGES_HAS_FTEMPLATE_BACKTRACE_LIMIT "-ftemplate-backtrace-limit=0")
ranges_append_flag(RANGES_HAS_FMACRO_BACKTRACE_LIMIT "-fmacro-backtrace-limit=1")
# Clang modules support
if (RANGES_MODULES)
ranges_append_flag(RANGES_HAS_MODULES -fmodules)
ranges_append_flag(RANGES_HAS_MODULE_MAP_FILE "-fmodule-map-file=${PROJECT_SOURCE_DIR}/include/module.modulemap")
ranges_append_flag(RANGES_HAS_MODULE_CACHE_PATH "-fmodules-cache-path=${PROJECT_BINARY_DIR}/module.cache")
if (RANGES_LIBCXX_MODULE)
ranges_append_flag(RANGES_HAS_LIBCXX_MODULE_MAP_FILE "-fmodule-map-file=${RANGES_LIBCXX_MODULE}")
endif()
if (RANGES_ENV_MACOSX)
ranges_append_flag(RANGES_HAS_NO_IMPLICIT_MODULE_MAPS -fno-implicit-module-maps)
endif()
if (RANGES_DEBUG_BUILD)
ranges_append_flag(RANGES_HAS_GMODULES -gmodules)
endif()
endif()
# Sanitizer support: detect incompatible sanitizer combinations
if (RANGES_ASAN AND RANGES_MSAN)
message(FATAL_ERROR "[range-v3 error]: AddressSanitizer and MemorySanitizer are both enabled at the same time!")
endif()
if (RANGES_MSAN AND RANGES_ENV_MACOSX)
message(FATAL_ERROR "[range-v3 error]: MemorySanitizer is not supported on MacOSX!")
endif()
# AddressSanitizer support
if (RANGES_ASAN)
# This policy enables passing the linker flags to the linker when trying to
# test the features, which is required to successfully link ASan binaries
cmake_policy(SET CMP0056 NEW)
set (ASAN_FLAGS "")
if (RANGES_ENV_MACOSX) # LeakSanitizer not supported on MacOSX
set (ASAN_FLAGS "-fsanitize=address,signed-integer-overflow,shift,integer-divide-by-zero,implicit-signed-integer-truncation,implicit-integer-sign-change,undefined,nullability")
else()
if (RANGES_CXX_COMPILER_CLANG AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.0")
set (ASAN_FLAGS "-fsanitize=address")
else()
set (ASAN_FLAGS "-fsanitize=address,signed-integer-overflow,shift,integer-divide-by-zero,implicit-signed-integer-truncation,implicit-integer-sign-change,leak,nullability")
endif()
endif()
ranges_append_flag(RANGES_HAS_ASAN "${ASAN_FLAGS}")
if (RANGES_HAS_ASAN) #ASAN flags must be passed to the linker:
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${ASAN_FLAGS}")
endif()
ranges_append_flag(RANGES_HAS_SANITIZE_NO_RECOVER "-fno-sanitize-recover=all")
ranges_append_flag(RANGES_HAS_NO_OMIT_FRAME_POINTER -fno-omit-frame-pointer)
endif()
# MemorySanitizer support
if (RANGES_MSAN)
# This policy enables passing the linker flags to the linker when trying to
# compile the examples, which is required to successfully link MSan binaries
cmake_policy(SET CMP0056 NEW)
ranges_append_flag(RANGES_HAS_MSAN "-fsanitize=memory")
ranges_append_flag(RANGES_HAS_MSAN_TRACK_ORIGINS -fsanitize-memory-track-origins)
ranges_append_flag(RANGES_HAS_SANITIZE_RECOVER_ALL "-fno-sanitize-recover=all")
ranges_append_flag(RANGES_HAS_NO_OMIT_FRAME_POINTER -fno-omit-frame-pointer)
endif()
# Build types:
if (RANGES_DEBUG_BUILD AND RANGES_RELEASE_BUILD)
message(FATAL_ERROR "[range-v3 error] Cannot simultaneously generate debug and release builds!")
endif()
if (RANGES_DEBUG_BUILD)
ranges_append_flag(RANGES_HAS_NO_INLINE -fno-inline)
ranges_append_flag(RANGES_HAS_STACK_PROTECTOR_ALL -fstack-protector-all)
ranges_append_flag(RANGES_HAS_G3 -g3)
# Clang can generate debug info tuned for LLDB or GDB
if (RANGES_CXX_COMPILER_CLANG)
if (RANGES_ENV_MACOSX)
ranges_append_flag(RANGES_HAS_GLLDB -glldb)
elseif(RANGES_ENV_LINUX OR RANGES_ENV_OPENBSD)
ranges_append_flag(RANGES_HAS_GGDB -ggdb)
endif()
endif()
endif()
if (RANGES_RELEASE_BUILD)
if (NOT RANGES_ASSERTIONS)
ranges_append_flag(RANGES_HAS_DNDEBUG -DNDEBUG)
endif()
if (NOT RANGES_ASAN AND NOT RANGES_MSAN)
# The quality of ASan and MSan error messages suffers if we disable the
# frame pointer, so leave it enabled when compiling with either of them:
ranges_append_flag(RANGES_HAS_OMIT_FRAME_POINTER -fomit-frame-pointer)
endif()
ranges_append_flag(RANGES_HAS_OFAST -Ofast)
if (NOT RANGES_HAS_OFAST)
ranges_append_flag(RANGES_HAS_O2 -O2)
endif()
ranges_append_flag(RANGES_HAS_STRICT_ALIASING -fstrict-aliasing)
ranges_append_flag(RANGES_HAS_STRICT_VTABLE_POINTERS -fstrict-vtable-pointers)
ranges_append_flag(RANGES_HAS_FAST_MATH -ffast-math)
ranges_append_flag(RANGES_HAS_VECTORIZE -fvectorize)
if (NOT RANGES_ENV_MACOSX)
# Sized deallocation is not available in MacOSX:
ranges_append_flag(RANGES_HAS_SIZED_DEALLOCATION -fsized-deallocation)
endif()
if (RANGES_LLVM_POLLY)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mllvm -polly -mllvm -polly-vectorizer=stripmine")
endif()
if (RANGES_CXX_COMPILER_CLANG AND (NOT (RANGES_INLINE_THRESHOLD EQUAL -1)))
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mllvm -inline-threshold=${RANGES_INLINE_THRESHOLD}")
endif()
endif()
if (RANGES_NATIVE)
ranges_append_flag(RANGES_HAS_MARCH_NATIVE "-march=native")
ranges_append_flag(RANGES_HAS_MTUNE_NATIVE "-mtune=native")
endif()
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_FLAGS ${RANGES_STD_FLAG})
# Probe for library and compiler support for aligned new
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/aligned_new_probe.cpp" RANGE_V3_PROBE_CODE)
check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGE_V3_ALIGNED_NEW_PROBE)
unset(RANGE_V3_PROBE_CODE)
unset(CMAKE_REQUIRED_FLAGS)
if (NOT RANGE_V3_ALIGNED_NEW_PROBE)
add_compile_options("-DRANGES_CXX_ALIGNED_NEW=0")
endif()
# Probe for coroutine TS support
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/coro_test_code.cpp" RANGE_V3_PROBE_CODE)
if(RANGES_CXX_COMPILER_MSVC)
set(CMAKE_REQUIRED_FLAGS "/await")
check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGES_HAS_AWAIT)
if(RANGES_HAS_AWAIT)
set(RANGE_V3_COROUTINE_FLAGS "/await")
endif()
elseif(RANGES_CXX_COMPILER_CLANG)
set(CMAKE_REQUIRED_FLAGS "-fcoroutines-ts ${RANGES_STD_FLAG}")
check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGES_HAS_FCOROUTINES_TS)
if(RANGES_HAS_FCOROUTINES_TS)
set(RANGE_V3_COROUTINE_FLAGS "-fcoroutines-ts")
endif()
endif()
unset(CMAKE_REQUIRED_FLAGS)
unset(RANGE_V3_PROBE_CODE)
if (RANGE_V3_COROUTINE_FLAGS)
add_compile_options(${RANGE_V3_COROUTINE_FLAGS})
endif()
# Test for concepts support
file(READ "${CMAKE_CURRENT_SOURCE_DIR}/cmake/concepts_test_code.cpp" RANGE_V3_PROBE_CODE)
if(RANGES_CXX_COMPILER_GCC OR RANGES_CXX_COMPILER_CLANG)
set(CMAKE_REQUIRED_FLAGS "-fconcepts ${RANGES_STD_FLAG}")
check_cxx_source_compiles("${RANGE_V3_PROBE_CODE}" RANGE_V3_HAS_FCONCEPTS)
if(RANGE_V3_HAS_FCONCEPTS)
set(RANGE_V3_CONCEPTS_FLAGS "-fconcepts")
endif()
endif()
unset(CMAKE_REQUIRED_FLAGS)
unset(RANGE_V3_PROBE_CODE)
if (RANGE_V3_CONCEPTS_FLAGS AND RANGES_PREFER_REAL_CONCEPTS)
add_compile_options(${RANGE_V3_CONCEPTS_FLAGS})
endif()
if (RANGES_VERBOSE_BUILD)
get_directory_property(RANGES_COMPILE_OPTIONS COMPILE_OPTIONS)
message(STATUS "[range-v3]: C++ flags: ${CMAKE_CXX_FLAGS}")
message(STATUS "[range-v3]: C++ debug flags: ${CMAKE_CXX_FLAGS_DEBUG}")
message(STATUS "[range-v3]: C++ Release Flags: ${CMAKE_CXX_FLAGS_RELEASE}")
message(STATUS "[range-v3]: C++ Compile Flags: ${CMAKE_CXX_COMPILE_FLAGS}")
message(STATUS "[range-v3]: Compile options: ${RANGES_COMPILE_OPTIONS}")
message(STATUS "[range-v3]: C Flags: ${CMAKE_C_FLAGS}")
message(STATUS "[range-v3]: C Compile Flags: ${CMAKE_C_COMPILE_FLAGS}")
message(STATUS "[range-v3]: EXE Linker flags: ${CMAKE_EXE_LINKER_FLAGS}")
message(STATUS "[range-v3]: C++ Linker flags: ${CMAKE_CXX_LINK_FLAGS}")
message(STATUS "[range-v3]: MODULE Linker flags: ${CMAKE_MODULE_LINKER_FLAGS}")
get_directory_property(CMakeCompDirDefs COMPILE_DEFINITIONS)
message(STATUS "[range-v3]: Compile Definitions: ${CmakeCompDirDefs}")
endif()
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