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Copy pathQtFlagHandlingHelpers.cmake
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QtFlagHandlingHelpers.cmake
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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
# Sets '${var}' to a genex that extracts the target's property.
# Sets 'have_${var}' to a genex that checks that the property has a
# non-empty value.
macro(qt_internal_genex_get_property var target property)
set(${var} "$<TARGET_PROPERTY:${target},${property}>")
set(have_${var} "$<BOOL:${${var}}>")
endmacro()
# Sets '${var}' to a genex that will join the given property values
# using '${glue}' and will surround the entire output with '${prefix}'
# and '${suffix}'.
macro(qt_internal_genex_get_joined_property var target property prefix suffix glue)
qt_internal_genex_get_property("${var}" "${target}" "${property}")
set(${var}
"$<${have_${var}}:${prefix}$<JOIN:${${var}},${glue}>${suffix}>")
endmacro()
# This function generates LD version script for the target and uses it in the target linker line.
# Function has two modes dependending on the specified arguments.
# Arguments:
# PRIVATE_CONTENT_FILE specifies the pre-cooked content of Qt_<version>_PRIVATE_API section.
# Requires the content file available at build time.
function(qt_internal_add_linker_version_script target)
if(WASM)
return()
endif()
cmake_parse_arguments(PARSE_ARGV 1 arg
""
"PRIVATE_CONTENT_FILE"
"PRIVATE_HEADERS"
)
_qt_internal_validate_all_args_are_parsed(arg)
if(arg_PRIVATE_CONTENT_FILE AND arg_PRIVATE_HEADERS)
message(FATAL_ERROR "Both PRIVATE_CONTENT_FILE and PRIVATE_HEADERS are specified.")
endif()
if(TEST_ld_version_script)
# Create a list of mangled symbol matches for all "std::" symbols. This
# list will catch most symbols, but will miss global-namespace symbols
# that only have std parameters.
# See https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.name for reference
set(contents "NonQt {\nlocal:")
# For types: vtable, VTT, typeinfo, typeinfo name
foreach(ptrqualifier "" "P" "PK") # T, T *, const T * (volatile ignored)
string(APPEND contents "\n _ZT[VTIS]${ptrqualifier}S*;"
"_ZT[VTIS]${ptrqualifier}NS*;")
endforeach()
# For functions and variables
foreach(special ""
"G[VR]" # guard variables, extended-lifetime references
"GTt") # transaction entry points
foreach(cvqualifier "" "[VK]" "VK") # plain, const|volatile, const volatile
string(APPEND contents "\n ")
foreach(refqualifier "" "[RO]") # plain, & or &&
# For names in the std:: namespace, compression applies
# (https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling-compression)
string(APPEND contents
" _Z${special}${cvqualifier}${refqualifier}S*;" # plain
" _Z${special}N${cvqualifier}${refqualifier}S*;" # nested name
)
endforeach()
endforeach()
endforeach()
string(APPEND contents "\n};\nQt_${PROJECT_VERSION_MAJOR}")
if(QT_FEATURE_elf_private_full_version)
string(APPEND contents ".${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
endif()
string(APPEND contents "_PRIVATE_API { qt_private_api_tag*;\n")
if(arg_PRIVATE_HEADERS)
foreach(ph ${arg_PRIVATE_HEADERS})
string(APPEND contents " @FILE:${ph}@\n")
endforeach()
else()
string(APPEND contents "@PRIVATE_CONTENT@")
endif()
string(APPEND contents "};\n")
set(current "Qt_${PROJECT_VERSION_MAJOR}")
string(APPEND contents "${current} {\n *;")
get_target_property(target_type ${target} TYPE)
if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
# Export all specializations of the QExplicitlySharedDataPointer
# and QSharedDataPointer destructors; due to use of the
# QT_DECLARE_Q{,E}SDP_SPECIALIZATION_DTOR_WITH_EXPORT macros
string(APPEND contents "\n _ZN*18QSharedDataPointerI*D?Ev;")
string(APPEND contents "\n _ZN*28QExplicitlySharedDataPointerI*D?Ev;")
set(genex_prefix "\n ")
set(genex_glue "$<SEMICOLON>\n ")
set(genex_suffix "$<SEMICOLON>")
qt_internal_genex_get_joined_property(
linker_exports "${target}" _qt_extra_linker_script_exports
"${genex_prefix}" "${genex_suffix}" "${genex_glue}"
)
string(APPEND contents "${linker_exports}")
endif()
string(APPEND contents "\n};\n")
if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
set(property_genex "$<TARGET_PROPERTY:${target},_qt_extra_linker_script_content>")
set(check_genex "$<BOOL:${property_genex}>")
string(APPEND contents
"$<${check_genex}:${property_genex}>")
endif()
set(infile "${CMAKE_CURRENT_BINARY_DIR}/${target}.version.in")
set(outfile "${CMAKE_CURRENT_BINARY_DIR}/${target}.version")
file(GENERATE OUTPUT "${infile}" CONTENT "${contents}")
if(NOT arg_PRIVATE_CONTENT_FILE)
set(arg_PRIVATE_CONTENT_FILE "")
endif()
set(generator_command ${CMAKE_COMMAND}
"-DIN_FILE=${infile}"
"-DPRIVATE_CONTENT_FILE=${arg_PRIVATE_CONTENT_FILE}"
"-DOUT_FILE=${outfile}"
-P "${QT_CMAKE_DIR}/QtGenerateVersionScript.cmake"
)
set(generator_dependencies
"${arg_PRIVATE_CONTENT_FILE}"
"${QT_CMAKE_DIR}/QtGenerateVersionScript.cmake"
)
add_custom_command(
OUTPUT "${outfile}"
COMMAND ${generator_command}
DEPENDS ${generator_dependencies}
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
COMMENT "Generating version linker script for target ${target}"
VERBATIM
)
add_custom_target(${target}_version_script DEPENDS ${outfile})
add_dependencies(${target} ${target}_version_script)
target_link_options(${target} PRIVATE "-Wl,--version-script,${outfile}")
endif()
endfunction()
function(qt_internal_add_link_flags_no_undefined target)
if (NOT QT_BUILD_SHARED_LIBS OR WASM)
return()
endif()
if (VXWORKS)
# VxWorks requires thread_local-related symbols to be found at
# runtime, resulting in linker error when no-undefined flag is
# set and thread_local is used
return()
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
# ld64 defaults to -undefined,error, and in Xcode 15
# passing this option is deprecated, causing a warning.
return()
endif()
if ((GCC OR CLANG) AND NOT MSVC)
if(CLANG AND QT_FEATURE_sanitizer)
return()
endif()
set(previous_CMAKE_REQUIRED_LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS})
set(CMAKE_REQUIRED_LINK_OPTIONS "-Wl,-undefined,error")
check_cxx_source_compiles("int main() {}" HAVE_DASH_UNDEFINED_SYMBOLS)
if(HAVE_DASH_UNDEFINED_SYMBOLS)
set(no_undefined_flag "-Wl,-undefined,error")
endif()
set(CMAKE_REQUIRED_LINK_OPTIONS "-Wl,--no-undefined")
check_cxx_source_compiles("int main() {}" HAVE_DASH_DASH_NO_UNDEFINED)
if(HAVE_DASH_DASH_NO_UNDEFINED)
set(no_undefined_flag "-Wl,--no-undefined")
endif()
set(CMAKE_REQUIRED_LINK_OPTIONS ${previous_CMAKE_REQUIRED_LINK_OPTIONS})
if (NOT HAVE_DASH_UNDEFINED_SYMBOLS AND NOT HAVE_DASH_DASH_NO_UNDEFINED)
message(FATAL_ERROR "Platform linker doesn't support erroring upon encountering undefined symbols. Target:\"${target}\".")
endif()
target_link_options("${target}" PRIVATE "${no_undefined_flag}")
endif()
endfunction()
function(qt_internal_apply_gc_binaries_conditional target visibility)
# Should only be applied when the feature is enabled, aka for static builds.
if(NOT QT_FEATURE_gc_binaries)
return()
endif()
qt_internal_apply_gc_binaries("${target}" "${visibility}")
endfunction()
function(qt_internal_apply_gc_binaries target visibility)
set(possible_visibilities PRIVATE INTERFACE PUBLIC)
if(NOT visibility IN_LIST possible_visibilities)
message(FATAL_ERROR "Visibitily setting must be one of PRIVATE, INTERFACE or PUBLIC.")
endif()
string(JOIN "" clang_or_gcc_begin
"$<$<OR:"
"$<CXX_COMPILER_ID:GNU>,"
"$<CXX_COMPILER_ID:Clang>,"
"$<CXX_COMPILER_ID:AppleClang>,"
"$<CXX_COMPILER_ID:IntelLLVM>"
">:"
)
set(clang_or_gcc_end ">")
if ((GCC OR CLANG) AND NOT WASM AND NOT UIKIT AND NOT MSVC)
if(APPLE)
set(gc_sections_flag "-Wl,-dead_strip")
elseif(SOLARIS)
set(gc_sections_flag "-Wl,-z,ignore")
elseif(LINUX OR BSD OR WIN32 OR ANDROID)
set(gc_sections_flag "-Wl,--gc-sections")
endif()
# Save the flag value with and without genex wrapping, so we can remove the wrapping
# when generating .pc pkgconfig files.
set_property(GLOBAL PROPERTY _qt_internal_gc_sections_without_genex "${gc_sections_flag}")
set(gc_sections_flag
"${clang_or_gcc_begin}${gc_sections_flag}${clang_or_gcc_end}")
set_property(GLOBAL PROPERTY _qt_internal_gc_sections_with_genex "${gc_sections_flag}")
endif()
if(gc_sections_flag)
target_link_options("${target}" ${visibility} "${gc_sections_flag}")
endif()
if((GCC OR CLANG) AND NOT WASM AND NOT UIKIT AND NOT MSVC)
set(split_sections_flags
"${clang_or_gcc_begin}-ffunction-sections;-fdata-sections${clang_or_gcc_end}")
endif()
if(split_sections_flags)
target_compile_options("${target}" ${visibility} "${split_sections_flags}")
endif()
endfunction()
function(qt_internal_apply_intel_cet target visibility)
if(NOT QT_FEATURE_intelcet)
return()
endif()
set(possible_visibilities PRIVATE INTERFACE PUBLIC)
if(NOT visibility IN_LIST possible_visibilities)
message(FATAL_ERROR "Visibitily setting must be one of PRIVATE, INTERFACE or PUBLIC.")
endif()
if(GCC)
string(JOIN "" flags
"$<$<OR:"
"$<CXX_COMPILER_ID:GNU>,"
"$<CXX_COMPILER_ID:Clang>,"
"$<CXX_COMPILER_ID:AppleClang>"
">:-mshstk>")
endif()
if(flags)
set(opt_out_condition "$<NOT:$<BOOL:$<TARGET_PROPERTY:_qt_no_intel_cet_harderning>>>")
set(flags "$<${opt_out_condition}:${flags}>")
target_compile_options("${target}" ${visibility} "${flags}")
endif()
endfunction()
# Meant to be applied to PlatformCommonInternal.
function(qt_internal_apply_intel_cet_harderning target)
if(NOT QT_FEATURE_intelcet)
return()
endif()
set(opt_out_condition "$<NOT:$<BOOL:$<TARGET_PROPERTY:_qt_no_intel_cet_harderning>>>")
if(MSVC)
set(intel_cet_flag "-CETCOMPAT")
set(condition "$<${opt_out_condition}:${intel_cet_flag}>")
qt_internal_platform_link_options("${target}" INTERFACE "${condition}")
else()
set(intel_cet_flag "-fcf-protection=full")
set(condition "$<${opt_out_condition}:${intel_cet_flag}>")
target_compile_options("${target}" INTERFACE "${condition}")
endif()
endfunction()
# Allow opting out of the Intel CET hardening on a per-target basis.
function(qt_internal_skip_intel_cet_hardening target)
set_target_properties("${target}" PROPERTIES _qt_no_intel_cet_harderning TRUE)
endfunction()
# Sets the exceptions flags for the given target according to value.
# If the value is not defined, set it to the exceptions feature value.
function(qt_internal_set_exceptions_flags target value)
#INTERFACE libraries compile nothing
get_target_property(target_type ${target} TYPE)
if(target_type STREQUAL "INTERFACE_LIBRARY")
return()
endif()
set_target_properties(${target} PROPERTIES _qt_internal_use_exceptions ${value})
endfunction()
# Deprecated. Replaced by qt_internal_set_skip_warnings_are_errors.
function(qt_skip_warnings_are_errors target)
qt_internal_set_skip_warnings_are_errors(${target} TRUE)
endfunction()
# Controls the QT_SKIP_WARNINGS_ARE_ERRORS property for the given target.
function(qt_internal_set_skip_warnings_are_errors target value)
get_target_property(target_type "${target}" TYPE)
if(target_type STREQUAL "INTERFACE_LIBRARY")
return()
endif()
set_target_properties("${target}" PROPERTIES QT_SKIP_WARNINGS_ARE_ERRORS ${value})
endfunction()
# Sets the default warnings behavior according to the WARNINGS_ARE_ERRORS and
# QT_REPO_NOT_WARNINGS_CLEAN flags.
function(qt_internal_default_warnings_are_errors target)
if(WARNINGS_ARE_ERRORS AND NOT QT_REPO_NOT_WARNINGS_CLEAN
# Xcode enables additional warnings on top of the ones we
# enable, and we are not warning clean in that context.
AND NOT "${CMAKE_GENERATOR}" STREQUAL "Xcode")
qt_internal_set_skip_warnings_are_errors("${target}" FALSE)
else()
qt_internal_set_skip_warnings_are_errors("${target}" TRUE)
endif()
endfunction()
function(qt_disable_warnings target)
get_target_property(target_type "${target}" TYPE)
if(target_type STREQUAL "INTERFACE_LIBRARY")
return()
endif()
set_target_properties("${target}" PROPERTIES QT_COMPILE_OPTIONS_DISABLE_WARNINGS ON)
endfunction()
function(qt_set_symbol_visibility_preset target value)
get_target_property(target_type "${target}" TYPE)
if(target_type STREQUAL "INTERFACE_LIBRARY")
return()
endif()
set_target_properties("${target}" PROPERTIES C_VISIBILITY_PRESET "${value}")
set_target_properties("${target}" PROPERTIES CXX_VISIBILITY_PRESET "${value}")
set_target_properties("${target}" PROPERTIES OBJC_VISIBILITY_PRESET "${value}")
set_target_properties("${target}" PROPERTIES OBJCXX_VISIBILITY_PRESET "${value}")
endfunction()
function(qt_set_symbol_visibility_hidden target)
qt_set_symbol_visibility_preset("${target}" "hidden")
endfunction()
function(qt_set_language_standards)
## Use the latest standard the compiler supports (same as qt_common.prf)
if (QT_FEATURE_cxx2b)
set(CMAKE_CXX_STANDARD 23 PARENT_SCOPE)
elseif (QT_FEATURE_cxx20)
set(CMAKE_CXX_STANDARD 20 PARENT_SCOPE)
else()
set(CMAKE_CXX_STANDARD 17 PARENT_SCOPE)
endif()
set(CMAKE_CXX_STANDARD_REQUIRED ON PARENT_SCOPE)
set(CMAKE_C_STANDARD 11 PARENT_SCOPE)
set(CMAKE_C_STANDARD_REQUIRED ON PARENT_SCOPE)
endfunction()
function(qt_set_language_standards_interface_compile_features target)
# Regardless of which C++ standard is used to build Qt itself, require C++17 when building
# Qt applications using CMake (because the Qt header files use C++17 features).
set(cpp_feature "cxx_std_17")
target_compile_features("${target}" INTERFACE ${cpp_feature})
endfunction()
function(qt_set_msvc_cplusplus_options target visibility)
# For MSVC we need to explicitly pass -Zc:__cplusplus to get correct __cplusplus.
# Check qt_config_compile_test for more info.
if(MSVC AND MSVC_VERSION GREATER_EQUAL 1913)
set(flags "-Zc:__cplusplus" "-permissive-")
target_compile_options("${target}" ${visibility}
"$<$<AND:$<CXX_COMPILER_ID:MSVC>,$<COMPILE_LANGUAGE:CXX>>:${flags}>")
endif()
endfunction()
function(qt_enable_utf8_sources target)
set(utf8_flags "")
if(MSVC)
list(APPEND utf8_flags "$<$<CXX_COMPILER_ID:MSVC>:-utf-8>")
endif()
if(utf8_flags)
# Allow opting out by specifying the QT_NO_UTF8_SOURCE target property.
set(opt_out_condition "$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_NO_UTF8_SOURCE>>>")
# Only set the compiler option for C and C++.
set(language_condition "$<COMPILE_LANGUAGE:C,CXX>")
# Compose the full condition.
set(genex_condition "$<AND:${opt_out_condition},${language_condition}>")
set(utf8_flags "$<${genex_condition}:${utf8_flags}>")
target_compile_options("${target}" INTERFACE "${utf8_flags}")
endif()
endfunction()
function(qt_internal_enable_unicode_defines)
if(WIN32)
set(no_unicode_condition
"$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_NO_UNICODE_DEFINES>>>")
target_compile_definitions(Platform
INTERFACE "$<${no_unicode_condition}:UNICODE$<SEMICOLON>_UNICODE>")
endif()
endfunction()
# Saves the list of known optimization flags for the current compiler in out_var.
#
# Mostly used for removing them before adding new ones.
function(qt_internal_get_all_possible_optimization_flag_values out_var)
set(flag_values "")
set(vars QT_CFLAGS_OPTIMIZE QT_CFLAGS_OPTIMIZE_FULL
QT_CFLAGS_OPTIMIZE_DEBUG QT_CFLAGS_OPTIMIZE_SIZE)
foreach(optimize_var ${vars})
set(value "${${optimize_var}}")
if(value)
list(APPEND flag_values "${value}")
endif()
endforeach()
# Additional flag values which might not be used in qmake mkspecs, but might be set by CMake,
# aka flags that are recognized by the compile which we might want to remove.
if(QT_CFLAGS_OPTIMIZE_VALID_VALUES)
list(APPEND flag_values ${QT_CFLAGS_OPTIMIZE_VALID_VALUES})
endif()
set("${out_var}" "${flag_values}" PARENT_SCOPE)
endfunction()
# Return's the current compiler's optimize_full flags if available.
# Otherwise returns the regular optimization level flag.
function(qt_internal_get_optimize_full_flags out_var)
set(optimize_full_flags "${QT_CFLAGS_OPTIMIZE_FULL}")
if(NOT optimize_full_flags)
set(optimize_full_flags "${QT_CFLAGS_OPTIMIZE}")
endif()
set(${out_var} "${optimize_full_flags}" PARENT_SCOPE)
endfunction()
# Prints the compiler and linker flags for each configuration, language and target type.
#
# Usually it would print the cache variables, but one may also override the variables
# in a specific directory scope, so this is useful for debugging.
#
# Basically dumps either scoped or cached
# CMAKE_<LANG>_FLAGS_CONFIG> and CMAKE_<TYPE>_LINKER_FLAGS_<CONFIG> variables.
function(qt_internal_print_optimization_flags_values)
qt_internal_get_enabled_languages_for_flag_manipulation(languages)
qt_internal_get_configs_for_flag_manipulation(configs)
qt_internal_get_target_link_types_for_flag_manipulation(target_link_types)
qt_internal_print_optimization_flags_values_helper(
"${languages}" "${configs}" "${target_link_types}")
endfunction()
# Helper function for printing the optimization flags.
function(qt_internal_print_optimization_flags_values_helper languages configs target_link_types)
foreach(lang ${languages})
set(flag_var_name "CMAKE_${lang}_FLAGS")
message(STATUS "${flag_var_name}: ${${flag_var_name}}")
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
message(STATUS "${flag_var_name}: ${${flag_var_name}}")
endforeach()
endforeach()
foreach(t ${target_link_types})
set(flag_var_name "CMAKE_${t}_LINKER_FLAGS")
message(STATUS "${flag_var_name}: ${${flag_var_name}}")
foreach(config ${configs})
set(flag_var_name "CMAKE_${t}_LINKER_FLAGS_${config}")
message(STATUS "${flag_var_name}: ${${flag_var_name}}")
endforeach()
endforeach()
endfunction()
# Saves the list of configs for which flag manipulation will occur.
function(qt_internal_get_configs_for_flag_manipulation out_var)
set(configs RELEASE RELWITHDEBINFO MINSIZEREL DEBUG)
# Opt into additional non-standard configs for flag removal only.
if(QT_ADDITIONAL_OPTIMIZATION_FLAG_CONFIGS)
list(APPEND configs ${QT_ADDITIONAL_OPTIMIZATION_FLAG_CONFIGS})
endif()
set(${out_var} "${configs}" PARENT_SCOPE)
endfunction()
# Saves the list of target link types for which flag manipulation will occur.
function(qt_internal_get_target_link_types_for_flag_manipulation out_var)
set(target_link_types EXE SHARED MODULE STATIC)
set(${out_var} "${target_link_types}" PARENT_SCOPE)
endfunction()
# Saves list of enabled languages for which it is safe to manipulate compilation flags.
function(qt_internal_get_enabled_languages_for_flag_manipulation out_var)
# Limit flag modification to c-like code. We don't want to accidentally add incompatible
# flags to MSVC's RC or Swift.
set(languages_to_process ASM C CXX OBJC OBJCXX)
get_property(globally_enabled_languages GLOBAL PROPERTY ENABLED_LANGUAGES)
set(enabled_languages "")
foreach(lang ${languages_to_process})
if(lang IN_LIST globally_enabled_languages)
list(APPEND enabled_languages "${lang}")
endif()
endforeach()
set(${out_var} "${enabled_languages}" PARENT_SCOPE)
endfunction()
# Helper function used to update compiler and linker flags further below
function(qt_internal_replace_flags_impl flag_var_name match_string replace_string IN_CACHE)
# This must come before cache variable modification because setting the
# cache variable with FORCE will overwrite the non-cache variable, but
# we need to use the original value on entry to this function.
# Handle an empty input string and an empty match string as a set().
if(match_string STREQUAL "" AND "${${flag_var_name}}" STREQUAL "")
set(${flag_var_name} "${replace_string}" PARENT_SCOPE)
else()
string(REPLACE
"${match_string}" "${replace_string}"
${flag_var_name} "${${flag_var_name}}")
string(STRIP "${${flag_var_name}}" ${flag_var_name})
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endif()
if(IN_CACHE)
# We must not use the non-cache variable's value because toolchain files
# might be appending things to the cache variable's value and storing it
# in a non-cache variable (e.g. Android NDK toolchain file does this).
# Work exclusively on cache variable value only.
get_property(help_text CACHE "${flag_var_name}" PROPERTY HELPSTRING)
# Handle an empty input string and an empty match string as a set().
if(match_string STREQUAL "" AND "$CACHE{${flag_var_name}}" STREQUAL "")
set(${flag_var_name} "${replace_string}" CACHE STRING "${help_text}" FORCE)
else()
set(mod_flags "$CACHE{${flag_var_name}}")
string(REPLACE
"${match_string}" "${replace_string}"
mod_flags "${mod_flags}")
string(STRIP "${mod_flags}" mod_flags)
set(${flag_var_name} "${mod_flags}" CACHE STRING "${help_text}" FORCE)
endif()
endif()
endfunction()
# Helper function used to update compiler and linker flags further below
function(qt_internal_remove_flags_impl flag_var_name flag_values IN_CACHE)
cmake_parse_arguments(arg "REGEX" "" "" ${ARGN})
set(replace_type REPLACE)
if(arg_REGEX)
list(PREPEND replace_type REGEX)
endif()
# This must come before cache variable modification because setting the
# cache variable with FORCE will overwrite the non-cache variable in this
# function scope, but we need to use the original value before that change.
foreach(flag_value IN LISTS flag_values)
string(${replace_type} "${flag_value}" " " ${flag_var_name} "${${flag_var_name}}")
endforeach()
string(STRIP "${${flag_var_name}}" ${flag_var_name})
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
if(IN_CACHE)
# We must not use the non-cache variable's value because toolchain files
# might be appending things to the cache variable's value and storing it
# in a non-cache variable (e.g. Android NDK toolchain file does this).
# Work exclusively on cache variable value only.
set(mod_flags $CACHE{${flag_var_name}})
foreach(flag_value IN LISTS flag_values)
string(${replace_type} "${flag_value}" " " mod_flags "${mod_flags}")
endforeach()
string(STRIP "${mod_flags}" mod_flags)
get_property(help_text CACHE ${flag_var_name} PROPERTY HELPSTRING)
set(${flag_var_name} "${mod_flags}" CACHE STRING "${help_text}" FORCE)
endif()
endfunction()
# Helper function used to update compiler and linker flags further below
function(qt_internal_add_flags_impl flag_var_name flags IN_CACHE)
# This must come before cache variable modification because setting the
# cache variable with FORCE will overwrite the non-cache variable, but
# we need to use the original value on entry to this function.
set(${flag_var_name} "${${flag_var_name}} ${flags}")
string(STRIP "${${flag_var_name}}" ${flag_var_name})
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
if(IN_CACHE)
# We must not use the non-cache variable's value because toolchain files
# might be appending things to the cache variable's value and storing it
# in a non-cache variable (e.g. Android NDK toolchain file does this).
# Work exclusively on cache variable value only.
set(mod_flags "$CACHE{${flag_var_name}} ${flags}")
string(STRIP "${mod_flags}" mod_flags)
get_property(help_text CACHE ${flag_var_name} PROPERTY HELPSTRING)
set(${flag_var_name} "${mod_flags}" CACHE STRING "${help_text}" FORCE)
endif()
endfunction()
# Removes all known compiler optimization flags for the given CONFIGS, for all enabled 'safe'
# languages. The flag variables are always updated in the calling scope, even if they did not
# exist beforehand.
#
# IN_CACHE - remove them from the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# CONFIGS - should be a list of upper case configs like DEBUG, RELEASE, RELWITHDEBINFO.
# LANGUAGES - optional list of languages like 'C', 'CXX', for which to remove the flags
# if not provided, defaults to the list of enabled C-like languages
function(qt_internal_remove_known_optimization_flags)
cmake_parse_arguments(PARSE_ARGV 0 arg
"IN_CACHE"
""
"CONFIGS;LANGUAGES")
_qt_internal_validate_all_args_are_parsed(arg)
if(NOT arg_CONFIGS)
message(FATAL_ERROR
"You must specify at least one configuration for which to remove the flags.")
endif()
if(arg_LANGUAGES)
set(enabled_languages "${arg_LANGUAGES}")
else()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
endif()
qt_internal_get_all_possible_optimization_flag_values(flag_values)
set(configs ${arg_CONFIGS})
foreach(lang ${enabled_languages})
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
qt_internal_remove_flags_impl(${flag_var_name} "${flag_values}" "${arg_IN_CACHE}")
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Removes specified flags from CMAKE_<LANGUAGES>_FLAGS[_CONFIGS] variables
#
# Option Arguments:
# IN_CACHE
# Enables flags removal from CACHE
# REGEX
# Enables the flag processing as a regular expression.
#
# Multi-value Arguments:
# CONFIGS
# List of configurations that need to clear flags. Clears all configs by default if not
# specified.
#
# LANGUAGES
# List of LANGUAGES that need clear flags. Clears all languages by default if not
# specified.
function(qt_internal_remove_compiler_flags flags)
cmake_parse_arguments(PARSE_ARGV 1 arg
"IN_CACHE;REGEX"
""
"CONFIGS;LANGUAGES"
)
_qt_internal_validate_all_args_are_parsed(arg)
if("${flags}" STREQUAL "")
message(WARNING "qt_internal_remove_compiler_flags was called without any flags specified.")
return()
endif()
if(arg_LANGUAGES)
set(languages "${arg_LANGUAGES}")
else()
qt_internal_get_enabled_languages_for_flag_manipulation(languages)
endif()
if(arg_CONFIGS)
set(configs "${arg_CONFIGS}")
else()
qt_internal_get_configs_for_flag_manipulation(configs)
endif()
if(arg_REGEX)
list(APPEND extra_options "REGEX")
endif()
foreach(lang ${languages})
set(flag_var_name "CMAKE_${lang}_FLAGS")
qt_internal_remove_flags_impl(${flag_var_name}
"${flags}"
"${arg_IN_CACHE}"
${extra_options}
)
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
qt_internal_remove_flags_impl(${flag_var_name}
"${flags}"
"${arg_IN_CACHE}"
${extra_options}
)
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Adds compiler flags for the given CONFIGS in the calling scope. Can also update the cache
# if asked to do so. The flag variables are always updated in the calling scope, even if they
# did not exist beforehand.
#
# FLAGS - should be a single string of flags separated by spaces.
# IN_CACHE - add them to the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# CONFIGS - should be a list of upper case configs like DEBUG, RELEASE, RELWITHDEBINFO.
# LANGUAGES - optional list of languages like 'C', 'CXX', for which to add the flags
# if not provided, defaults to the list of enabled C-like languages
function(qt_internal_add_compiler_flags)
cmake_parse_arguments(PARSE_ARGV 0 arg
"IN_CACHE"
"FLAGS"
"CONFIGS;LANGUAGES")
_qt_internal_validate_all_args_are_parsed(arg)
if(NOT arg_CONFIGS)
message(FATAL_ERROR
"You must specify at least one configuration for which to add the flags.")
endif()
if(NOT arg_FLAGS)
message(FATAL_ERROR "You must specify at least one flag to add.")
endif()
if(arg_LANGUAGES)
set(enabled_languages "${arg_LANGUAGES}")
else()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
endif()
set(configs ${arg_CONFIGS})
foreach(lang ${enabled_languages})
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
qt_internal_add_flags_impl(${flag_var_name} "${arg_FLAGS}" "${arg_IN_CACHE}")
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Convenience function that adds compiler flags for all release configurations.
# The flag variables are always updated in the calling scope, even if they did not
# exist beforehand.
#
# FLAGS - should be a single string of flags separated by spaces.
# IN_CACHE - add them to the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# LANGUAGES - optional list of languages like 'C', 'CXX', for which to add the flags
# if not provided, defaults to the list of enabled C-like languages
function(qt_internal_add_compiler_flags_for_release_configs)
cmake_parse_arguments(PARSE_ARGV 0 arg
"IN_CACHE"
"FLAGS"
"LANGUAGES")
_qt_internal_validate_all_args_are_parsed(arg)
set(args "")
if(arg_LANGUAGES)
set(enabled_languages "${arg_LANGUAGES}")
else()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
endif()
set(configs RELEASE RELWITHDEBINFO MINSIZEREL)
list(APPEND args CONFIGS ${configs})
if(arg_FLAGS)
list(APPEND args FLAGS "${arg_FLAGS}")
endif()
if(arg_IN_CACHE)
list(APPEND args IN_CACHE)
endif()
list(APPEND args LANGUAGES ${enabled_languages})
qt_internal_add_compiler_flags(${args})
foreach(lang ${enabled_languages})
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
set("${flag_var_name}" "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Convenience function that replaces all optimization flags with the equivalent of '-O3'
# (optimize_full) flag for all release configs.
#
# This is the equivalent of qmake's CONFIG += optimize_full.
# It is meant to be called in a subdirectory scope to enable full optimizations for a particular
# Qt module, like Core or Gui.
function(qt_internal_add_optimize_full_flags)
cmake_parse_arguments(PARSE_ARGV 0 arg
"IN_CACHE"
""
"")
_qt_internal_validate_all_args_are_parsed(arg)
# QT_USE_DEFAULT_CMAKE_OPTIMIZATION_FLAGS disables forced full optimization.
if(QT_USE_DEFAULT_CMAKE_OPTIMIZATION_FLAGS)
return()
endif()
# Assume that FEATURE_optimize_full has higher priority. But if FEATURE_optimize_full is OFF,
# flags are set by FEATURE_optimize_size should remain unchanged.
if(QT_FEATURE_optimize_size AND NOT QT_FEATURE_optimize_full)
return()
endif()
set(args "")
if(arg_IN_CACHE)
list(APPEND args IN_CACHE)
endif()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
set(configs RELEASE RELWITHDEBINFO)
if(QT_FEATURE_optimize_full) # Assume that FEATURE_optimize_full has higher priority.
list(APPEND configs MINSIZEREL)
endif()
qt_internal_remove_known_optimization_flags(${args} CONFIGS ${configs})
# If the respective compiler doesn't have optimize_full flags, use regular optimization flags.
# Mainly MSVC.
qt_internal_get_optimize_full_flags(optimize_full_flags)
list(APPEND args FLAGS "${optimize_full_flags}")
qt_internal_add_compiler_flags_for_release_configs(${args})
foreach(lang ${enabled_languages})
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
set("${flag_var_name}" "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Convenience function to replace a compiler flag with another one, for the given configurations
# for all enabled 'safe' languages.
# Essentially a glorified string(REPLACE).
# Can be used to remove compiler flags.
# The flag variables are always updated in the calling scope, even if they did not
# exist beforehand.
#
# match_string - string to match
# replace_string - replacement string
# IN_CACHE - replace them in the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# CONFIGS - should be a list of upper case configs like DEBUG, RELEASE, RELWITHDEBINFO.
# LANGUAGES - optional list of languages like 'C', 'CXX', for which to replace the flags
# if not provided, defaults to the list of enabled C-like languages
function(qt_internal_replace_compiler_flags match_string replace_string)
cmake_parse_arguments(PARSE_ARGV 2 arg
"IN_CACHE"
""
"CONFIGS;LANGUAGES")
_qt_internal_validate_all_args_are_parsed(arg)
if(NOT arg_CONFIGS)
message(FATAL_ERROR
"You must specify at least one configuration for which to replace the flags.")
endif()
if(arg_LANGUAGES)
set(enabled_languages "${arg_LANGUAGES}")
else()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
endif()
set(configs ${arg_CONFIGS})
foreach(lang ${enabled_languages})
foreach(config ${configs})
set(flag_var_name "CMAKE_${lang}_FLAGS_${config}")
qt_internal_replace_flags_impl(${flag_var_name}
"${match_string}" "${replace_string}" "${arg_IN_CACHE}")
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Convenience function to add linker flags, for the given configurations and target link types.
# The flag variables are always updated in the calling scope, even if they did not exist beforehand.
#
# FLAGS - should be a single string of flags separated by spaces.
# IN_CACHE - add them to the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# CONFIGS - should be a list of upper case configs like DEBUG, RELEASE, RELWITHDEBINFO.
# TYPES - should be a list of target link types as expected by CMake's
# CMAKE_<LINKER_TYPE>_LINKER_FLAGS_<CONFIG> cache variable.
# e.g EXE, MODULE, SHARED, STATIC.
function(qt_internal_add_linker_flags)
cmake_parse_arguments(PARSE_ARGV 0 arg
"IN_CACHE"
"FLAGS"
"CONFIGS;TYPES")
_qt_internal_validate_all_args_are_parsed(arg)
if(NOT arg_TYPES)
message(FATAL_ERROR
"You must specify at least one linker target type for which to add the flags.")
endif()
if(NOT arg_CONFIGS)
message(FATAL_ERROR
"You must specify at least one configuration for which to add the flags.")
endif()
if(NOT arg_FLAGS)
message(FATAL_ERROR "You must specify at least one flag to add.")
endif()
set(configs ${arg_CONFIGS})
set(target_link_types ${arg_TYPES})
foreach(config ${configs})
foreach(t ${target_link_types})
set(flag_var_name "CMAKE_${t}_LINKER_FLAGS_${config}")
qt_internal_add_flags_impl(${flag_var_name} "${arg_FLAGS}" "${arg_IN_CACHE}")
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# Convenience function to replace a linker flag with another one, for the given configurations
# and target link types.
# Essentially a glorified string(REPLACE).
# Can be used to remove linker flags.
# The flag variables are always updated in the calling scope, even if they did not exist beforehand.
#
# match_string - string to match
# replace_string - replacement string
# IN_CACHE - replace them in the corresponding cache variable too. Note that the cache
# variable may have a different value to the non-cache variable.
# CONFIGS - should be a list of upper case configs like DEBUG, RELEASE, RELWITHDEBINFO.
# TYPES - should be a list of target link types as expected by CMake's
# CMAKE_<LINKER_TYPE>_LINKER_FLAGS_<CONFIG> cache variable.
# e.g EXE, MODULE, SHARED, STATIC.
function(qt_internal_replace_linker_flags match_string replace_string)
cmake_parse_arguments(PARSE_ARGV 2 arg
"IN_CACHE"
""
"CONFIGS;TYPES")
_qt_internal_validate_all_args_are_parsed(arg)
if(NOT arg_TYPES)
message(FATAL_ERROR
"You must specify at least one linker target type for which to replace the flags.")
endif()
if(NOT arg_CONFIGS)
message(FATAL_ERROR
"You must specify at least one configuration for which to replace the flags.")
endif()
set(configs ${arg_CONFIGS})
set(target_link_types ${arg_TYPES})
foreach(config ${configs})
foreach(t ${target_link_types})
set(flag_var_name "CMAKE_${t}_LINKER_FLAGS_${config}")
qt_internal_replace_flags_impl(${flag_var_name}
"${match_string}" "${replace_string}" "${arg_IN_CACHE}")
set(${flag_var_name} "${${flag_var_name}}" PARENT_SCOPE)
endforeach()
endforeach()
endfunction()
# This function finds the optimization flags set by the default CMake platform modules or toolchain
# files and replaces them with flags that Qt qmake builds expect, for all the usual
# CMAKE_BUILD_TYPE configurations.
# This normalizes things like using -O2 for both Release and RelWithDebInfo, among other compilation
# flags. Also some linker flags specific to MSVC.
# See QTBUG-85992 for details.
#
# Note that both the calling scope and the CMake cache are updated.
function(qt_internal_set_up_config_optimizations_like_in_qmake)
# Allow opt out.
if(QT_USE_DEFAULT_CMAKE_OPTIMIZATION_FLAGS)
return()
endif()
qt_internal_get_enabled_languages_for_flag_manipulation(enabled_languages)
qt_internal_get_configs_for_flag_manipulation(configs)
qt_internal_get_target_link_types_for_flag_manipulation(target_link_types)