2021-12-08 11:32:04 +00:00
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# based on https://github.com/bluescarni/yacma
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include(CheckCXXCompilerFlag)
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macro(CHECK_ENABLE_CXX_FLAG flag)
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set(CMAKE_REQUIRED_QUIET TRUE)
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check_cxx_compiler_flag("${flag}" CHECK_CXX_FLAG)
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unset(CMAKE_REQUIRED_QUIET)
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if(CHECK_CXX_FLAG)
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2021-12-21 10:15:59 +00:00
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myx_cmake_message_notice("'${flag}': flag is supported.")
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2021-12-08 11:32:04 +00:00
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string(CONCAT _MYX_CMAKE_DETECTED_CXX_FLAGS
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"${_MYX_CMAKE_DETECTED_CXX_FLAGS} ${flag}")
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else()
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2021-12-21 10:15:59 +00:00
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myx_cmake_message_status("'${flag}': flag is NOT supported.")
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2021-12-08 11:32:04 +00:00
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endif()
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# NOTE: check_cxx_compiler stores variables in the cache.
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unset(CHECK_CXX_FLAG CACHE)
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endmacro()
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macro(CHECK_ENABLE_DEBUG_CXX_FLAG flag)
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if(CMAKE_BUILD_TYPE STREQUAL "Debug")
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set(CMAKE_REQUIRED_QUIET TRUE)
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check_cxx_compiler_flag("${flag}" CHECK_CXX_FLAG_DEBUG)
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unset(CMAKE_REQUIRED_QUIET)
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if(CHECK_CXX_FLAG_DEBUG)
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2021-12-21 10:45:09 +00:00
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myx_cmake_message_notice("'${flag}': debug flag is supported.")
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2021-12-08 11:32:04 +00:00
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string(CONCAT _MYX_CMAKE_DETECTED_CXX_FLAGS_DEBUG
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"${_MYX_CMAKE_DETECTED_CXX_FLAGS_DEBUG} ${flag}")
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else()
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2021-12-21 10:45:09 +00:00
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myx_cmake_message_status("'${flag}': debug flag is NOT supported.")
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2021-12-08 11:32:04 +00:00
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endif()
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# NOTE: check_cxx_compiler stores variables in the cache.
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unset(CHECK_CXX_FLAG_DEBUG CACHE)
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endif()
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endmacro()
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function(myx_cmake_set_cxx_standard version)
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# Выбор стандарта по умолчанию (можно переопределить в проекте)
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set(CMAKE_CXX_STANDARD_REQUIRED
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YES
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PARENT_SCOPE)
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if(version EQUAL 11)
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set(CMAKE_CXX_STANDARD
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11
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PARENT_SCOPE)
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set(CMAKE_CXX_EXTENSIONS
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YES
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PARENT_SCOPE)
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endif()
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if(version EQUAL 14)
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set(CMAKE_CXX_STANDARD
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14
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PARENT_SCOPE)
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set(CMAKE_CXX_EXTENSIONS
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YES
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PARENT_SCOPE)
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endif()
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if(version EQUAL 17)
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if(${CMAKE_VERSION} VERSION_LESS "3.10.0")
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check_cxx_compiler_flag(-std=gnu++17 HAVE_FLAG_STD_GNUXX17)
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if(HAVE_FLAG_STD_GNUXX17)
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add_compile_options("-std=gnu++17")
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else()
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check_cxx_compiler_flag(-std=gnu++1z HAVE_FLAG_STD_GNUXX1Z)
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if(HAVE_FLAG_STD_GNUXX1Z)
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add_compile_options("-std=gnu++1z")
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else()
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check_cxx_compiler_flag(-std=c++17 HAVE_FLAG_STD_CXX17)
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if(HAVE_FLAG_STD_CXX17)
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add_compile_options("-std=c++17")
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else()
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check_cxx_compiler_flag(-std=c++1z HAVE_FLAG_STD_CXX1Z)
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if(HAVE_FLAG_STD_CXX1Z)
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add_compile_options("-std=c++1z")
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endif()
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endif()
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endif()
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endif()
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else()
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set(CMAKE_CXX_STANDARD
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17
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PARENT_SCOPE)
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set(CMAKE_CXX_EXTENSIONS
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YES
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PARENT_SCOPE)
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endif()
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endif()
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endfunction()
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if(NOT MYX_CMAKE_CXX_FLAGS_AUTODETECTION_DONE)
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set(_MYX_CMAKE_DETECTED_CXX_FLAGS "")
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set(_MYX_CMAKE_DETECTED_CXX_FLAGS_DEBUG "")
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# Configuration bits specific for clang.
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if(CMAKE_CXX_COMPILER_IS_CLANG)
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if(CMAKE_COLOR_MAKEFILE)
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check_enable_cxx_flag(-fcolor-diagnostics)
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endif()
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# For now it seems like -Wshadow from clang behaves better than GCC's, just
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# enable it here for the time being.
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check_enable_debug_cxx_flag(-Wshadow)
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# New warnings in clang 8. NOTE: a few issues with macros here, let's
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# disable for now. CHECK_ENABLE_DEBUG_CXX_FLAG(-Wextra-semi-stmt) New
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# warnings in clang 10.
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check_enable_debug_cxx_flag(-Wtautological-overlap-compare)
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check_enable_debug_cxx_flag(-Wtautological-compare)
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check_enable_debug_cxx_flag(-Wtautological-bitwise-compare)
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check_enable_debug_cxx_flag(-Wbitwise-conditional-parentheses)
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check_enable_debug_cxx_flag(-Wrange-loop-analysis)
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check_enable_debug_cxx_flag(-Wmisleading-indentation)
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check_enable_debug_cxx_flag(-Wc99-designator)
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check_enable_debug_cxx_flag(-Wreorder-init-list)
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check_enable_debug_cxx_flag(-Wsizeof-pointer-div)
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check_enable_debug_cxx_flag(-Wsizeof-array-div)
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check_enable_debug_cxx_flag(-Wxor-used-as-pow)
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check_enable_debug_cxx_flag(-Wfinal-dtor-non-final-class)
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# NOTE: this is a new flag in Clang 13 which seems to give
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# incorrect warnings for UDLs.
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check_enable_debug_cxx_flag(-Wno-reserved-identifier)
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endif()
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# Common configuration for GCC, clang and Intel.
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if(CMAKE_CXX_COMPILER_IS_CLANG
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OR CMAKE_CXX_COMPILER_IS_INTEL
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OR CMAKE_CXX_COMPILER_IS_GCC)
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check_enable_debug_cxx_flag(-Wall)
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check_enable_debug_cxx_flag(-Wextra)
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check_enable_debug_cxx_flag(-Wnon-virtual-dtor)
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check_enable_debug_cxx_flag(-Wnoexcept)
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check_enable_debug_cxx_flag(-Wlogical-op)
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check_enable_debug_cxx_flag(-Wconversion)
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check_enable_debug_cxx_flag(-Wdeprecated)
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# This limit is supposed to be at least 1024 in C++11, but for some reason
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# clang sets this to 256, and gcc to 900.
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check_enable_cxx_flag(-ftemplate-depth=1024)
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check_enable_debug_cxx_flag(-Wold-style-cast)
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check_enable_debug_cxx_flag(-Wdisabled-optimization)
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# This is useful when the compiler decides the template backtrace is too
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# verbose.
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check_enable_debug_cxx_flag(-ftemplate-backtrace-limit=0)
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check_enable_debug_cxx_flag(-fstack-protector-all)
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# A few suggestion flags.
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check_enable_debug_cxx_flag(-Wsuggest-attribute=pure)
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check_enable_debug_cxx_flag(-Wsuggest-attribute=const)
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check_enable_debug_cxx_flag(-Wsuggest-attribute=noreturn)
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check_enable_debug_cxx_flag(-Wsuggest-attribute=format)
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# From GCC 5.
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check_enable_debug_cxx_flag(-Wodr)
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check_enable_debug_cxx_flag(-Wsuggest-final-types)
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check_enable_debug_cxx_flag(-Wsuggest-final-methods)
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check_enable_debug_cxx_flag(-Wsuggest-override)
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# From GCC 6.
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check_enable_debug_cxx_flag(-Wshift-negative-value)
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check_enable_debug_cxx_flag(-Wshift-overflow=2)
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check_enable_debug_cxx_flag(-Wduplicated-cond)
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check_enable_debug_cxx_flag(-Wnull-dereference)
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# From GCC 7.
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check_enable_debug_cxx_flag(-Wrestrict)
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check_enable_debug_cxx_flag(-Waligned-new)
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check_enable_debug_cxx_flag(-fdiagnostics-parseable-fixits)
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check_enable_debug_cxx_flag(-fdiagnostics-generate-patch)
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# From GCC 8.
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check_enable_debug_cxx_flag(-Wcast-align=strict)
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# This is supposed to produce a nice graphical visualization of mismatching
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# template errors.
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check_enable_cxx_flag(-fdiagnostics-show-template-tree)
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check_enable_debug_cxx_flag(-fdiagnostics-show-option)
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check_enable_debug_cxx_flag(-pedantic)
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check_enable_debug_cxx_flag(-Wcast-align)
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check_enable_debug_cxx_flag(-Wcast-qual)
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check_enable_debug_cxx_flag(-Wctor-dtor-privacy)
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check_enable_debug_cxx_flag(-Wdisabled-optimization)
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check_enable_debug_cxx_flag(-Wformat=2)
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check_enable_debug_cxx_flag(-Winit-self)
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check_enable_debug_cxx_flag(-Wmissing-include-dirs)
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check_enable_debug_cxx_flag(-Woverloaded-virtual)
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check_enable_debug_cxx_flag(-Wredundant-decls)
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check_enable_debug_cxx_flag(-Wsign-promo)
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check_enable_debug_cxx_flag(-Wstrict-overflow=5)
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check_enable_debug_cxx_flag(-Wundef)
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check_enable_debug_cxx_flag(-Wno-unused)
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check_enable_debug_cxx_flag(-Wno-variadic-macros)
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check_enable_debug_cxx_flag(-Wno-parentheses)
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check_enable_debug_cxx_flag(-Wstrict-null-sentinel)
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check_enable_debug_cxx_flag(-Wshadow-all)
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endif()
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if(CMAKE_CXX_COMPILER_IS_GCC)
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if(CMAKE_COLOR_MAKEFILE)
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check_enable_cxx_flag(-fdiagnostics-color=auto)
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endif()
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# The -Wmaybe-uninitialized flag is enabled by -Wall, but it is known to
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# emit a lot of possibly spurious warnings. Let's just disable it.
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check_enable_debug_cxx_flag(-Wno-maybe-uninitialized)
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# New in GCC 9.
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check_enable_debug_cxx_flag(-Waddress-of-packed-member)
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if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "5.999")
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# NOTE: GCC >= 6 seems to be wrongly warning about visibility attributes
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# in some situations: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80947
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# Let's just disable the warning for now.
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check_enable_cxx_flag(-Wno-attributes)
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endif()
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endif()
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# cmake-format: off
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if(MYX_CMAKE_LSB_DISTRIBUTOR_ID STREQUAL "AstraLinuxSE" AND
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MYX_CMAKE_LSB_CODENAME STREQUAL "smolensk" AND
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MYX_CMAKE_LSB_RELEASE STREQUAL "1.5")
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# cmake-format: on
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myx_cmake_set_cxx_standard(11)
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elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "e2k")
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myx_cmake_set_cxx_standard(14)
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check_enable_debug_cxx_flag(-Wno-invalid-offsetof)
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list(APPEND CMAKE_LIBRARY_PATH "/usr/lib/e2k-linux-gnu")
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else()
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myx_cmake_set_cxx_standard(17)
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# -Wshadow gives a lot of false positives with GCC 4.7.2 in Astra Linux 1.5
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if(CMAKE_CXX_COMPILER_IS_GCC)
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check_enable_debug_cxx_flag(-Wshadow)
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endif()
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endif()
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# Set the cache variables.
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set(MYX_CMAKE_DETECTED_CXX_FLAGS
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"${_MYX_CMAKE_DETECTED_CXX_FLAGS}"
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CACHE INTERNAL "")
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set(MYX_CMAKE_DETECTED_CXX_FLAGS_DEBUG
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"${_MYX_CMAKE_DETECTED_CXX_FLAGS_DEBUG}"
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CACHE INTERNAL "")
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set(MYX_CMAKE_CXX_FLAGS_AUTODETECTION_DONE
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YES
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CACHE INTERNAL "")
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endif()
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