myx-cmake/MyxCMake/modules/MyxCMakeCompilerFlags.cmake

241 lines
8.9 KiB
CMake

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