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qt5base-lts/cmake/QtFeature.cmake
Joerg Bornemann 564f07086c Don't repeat conditions of use_*_linker features in QtFeature.cmake 
qt_config_linker_supports() repeated the conditions of all use_*_linker
features, because the features are not evaluated yet when this function
is called, and the function needs to know what linker is used to build Qt.

Move the required tests and features before any
qt_config_linker_supports() call and evaluate the use_*_linker features
early.

Change-Id: I306f032356682a0e82e4d7c4234e5bbc820ab143
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-07-13 15:27:23 +02:00

1094 lines
42 KiB
CMake
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include(QtFeatureCommon)
include(CheckCXXCompilerFlag)
function(qt_feature_module_begin)
qt_parse_all_arguments(arg "qt_feature_module_begin"
"NO_MODULE;ONLY_EVALUATE_FEATURES"
"LIBRARY;PRIVATE_FILE;PUBLIC_FILE" "PUBLIC_DEPENDENCIES;PRIVATE_DEPENDENCIES" ${ARGN})
if(NOT arg_ONLY_EVALUATE_FEATURES)
if ("${arg_LIBRARY}" STREQUAL "" AND (NOT ${arg_NO_MODULE}))
message(FATAL_ERROR
"qt_feature_begin_module needs a LIBRARY name! (or specify NO_MODULE)")
endif()
if ("${arg_PUBLIC_FILE}" STREQUAL "")
message(FATAL_ERROR "qt_feature_begin_module needs a PUBLIC_FILE name!")
endif()
if ("${arg_PRIVATE_FILE}" STREQUAL "")
message(FATAL_ERROR "qt_feature_begin_module needs a PRIVATE_FILE name!")
endif()
set(__QtFeature_only_evaluate_features OFF PARENT_SCOPE)
else()
set(__QtFeature_only_evaluate_features ON PARENT_SCOPE)
endif()
set(__QtFeature_library "${arg_LIBRARY}" PARENT_SCOPE)
set(__QtFeature_public_features "" PARENT_SCOPE)
set(__QtFeature_private_features "" PARENT_SCOPE)
set(__QtFeature_internal_features "" PARENT_SCOPE)
set(__QtFeature_private_file "${arg_PRIVATE_FILE}" PARENT_SCOPE)
set(__QtFeature_public_file "${arg_PUBLIC_FILE}" PARENT_SCOPE)
set(__QtFeature_private_extra "" PARENT_SCOPE)
set(__QtFeature_public_extra "" PARENT_SCOPE)
set(__QtFeature_config_definitions "" PARENT_SCOPE)
set(__QtFeature_define_definitions "" PARENT_SCOPE)
endfunction()
function(qt_feature feature)
set(original_name "${feature}")
qt_feature_normalize_name("${feature}" feature)
set_property(GLOBAL PROPERTY QT_FEATURE_ORIGINAL_NAME_${feature} "${original_name}")
qt_parse_all_arguments(arg "qt_feature"
"PRIVATE;PUBLIC"
"LABEL;PURPOSE;SECTION;" "AUTODETECT;CONDITION;ENABLE;DISABLE;EMIT_IF" ${ARGN})
set(_QT_FEATURE_DEFINITION_${feature} ${ARGN} PARENT_SCOPE)
# Register feature for future use:
if (arg_PUBLIC)
list(APPEND __QtFeature_public_features "${feature}")
endif()
if (arg_PRIVATE)
list(APPEND __QtFeature_private_features "${feature}")
endif()
if (NOT arg_PUBLIC AND NOT arg_PRIVATE)
list(APPEND __QtFeature_internal_features "${feature}")
endif()
set(__QtFeature_public_features ${__QtFeature_public_features} PARENT_SCOPE)
set(__QtFeature_private_features ${__QtFeature_private_features} PARENT_SCOPE)
set(__QtFeature_internal_features ${__QtFeature_internal_features} PARENT_SCOPE)
endfunction()
function(qt_evaluate_to_boolean expressionVar)
if(${${expressionVar}})
set(${expressionVar} ON PARENT_SCOPE)
else()
set(${expressionVar} OFF PARENT_SCOPE)
endif()
endfunction()
function(qt_evaluate_config_expression resultVar)
set(result "")
set(nestingLevel 0)
set(skipNext OFF)
set(expression "${ARGN}")
list(LENGTH expression length)
math(EXPR length "${length}-1")
foreach(memberIdx RANGE ${length})
if(${skipNext})
set(skipNext OFF)
continue()
endif()
list(GET expression ${memberIdx} member)
if("${member}" STREQUAL "(")
if(${nestingLevel} GREATER 0)
list(APPEND result ${member})
endif()
math(EXPR nestingLevel "${nestingLevel} + 1")
continue()
elseif("${member}" STREQUAL ")")
math(EXPR nestingLevel "${nestingLevel} - 1")
if(nestingLevel LESS 0)
break()
endif()
if(${nestingLevel} EQUAL 0)
qt_evaluate_config_expression(result ${result})
else()
list(APPEND result ${member})
endif()
continue()
elseif(${nestingLevel} GREATER 0)
list(APPEND result ${member})
continue()
elseif("${member}" STREQUAL "NOT")
list(APPEND result ${member})
continue()
elseif("${member}" STREQUAL "AND")
qt_evaluate_to_boolean(result)
if(NOT ${result})
break()
endif()
set(result "")
elseif("${member}" STREQUAL "OR")
qt_evaluate_to_boolean(result)
if(${result})
break()
endif()
set(result "")
elseif("${member}" STREQUAL "STREQUAL" AND memberIdx LESS ${length})
# Unfortunately the semantics for STREQUAL in if() are broken when the
# RHS is an empty string and the parameters to if are coming through a variable.
# So we expect people to write the empty string with single quotes and then we
# do the comparison manually here.
list(LENGTH result lhsIndex)
math(EXPR lhsIndex "${lhsIndex}-1")
list(GET result ${lhsIndex} lhs)
list(REMOVE_AT result ${lhsIndex})
set(lhs "${${lhs}}")
math(EXPR rhsIndex "${memberIdx}+1")
set(skipNext ON)
list(GET expression ${rhsIndex} rhs)
# We can't pass through an empty string with double quotes through various
# stages of substitution, so instead it is represented using single quotes
# and resolve here.
string(REGEX REPLACE "'(.*)'" "\\1" rhs "${rhs}")
string(COMPARE EQUAL "${lhs}" "${rhs}" stringCompareResult)
list(APPEND result ${stringCompareResult})
else()
string(FIND "${member}" "QT_FEATURE_" idx)
if(idx EQUAL 0)
# Remove the QT_FEATURE_ prefix
string(SUBSTRING "${member}" 11 -1 feature)
qt_evaluate_feature(${feature})
endif()
list(APPEND result ${member})
endif()
endforeach()
# The 'TARGET Gui' case is handled by qt_evaluate_to_boolean, by passing those tokens verbatim
# to if().
if("${result}" STREQUAL "")
set(result ON)
else()
qt_evaluate_to_boolean(result)
endif()
set(${resultVar} ${result} PARENT_SCOPE)
endfunction()
function(_qt_internal_dump_expression_values expression_dump expression)
set(dump "")
set(skipNext FALSE)
set(isTargetExpression FALSE)
set(keywords "EQUAL" "LESS" "LESS_EQUAL" "GREATER" "GREATER_EQUAL" "STREQUAL" "STRLESS"
"STRLESS_EQUAL" "STRGREATER" "STRGREATER_EQUAL" "VERSION_EQUAL" "VERSION_LESS"
"VERSION_LESS_EQUAL" "VERSION_GREATER" "VERSION_GREATER_EQUAL" "MATCHES"
"EXISTS" "COMMAND" "DEFINED" "NOT" "AND" "OR" "TARGET" "EXISTS" "IN_LIST" "(" ")")
list(LENGTH expression length)
math(EXPR length "${length}-1")
if(${length} LESS 0)
return()
endif()
foreach(memberIdx RANGE ${length})
if(${skipNext})
set(skipNext FALSE)
continue()
endif()
list(GET expression ${memberIdx} member)
if(NOT "${member}" IN_LIST keywords)
string(FIND "${member}" "QT_FEATURE_" idx)
if(idx EQUAL 0)
if(NOT DEFINED ${member})
list(APPEND dump "${member} not evaluated")
else()
list(APPEND dump "${member} = \"${${member}}\"")
endif()
elseif(isTargetExpression)
set(targetExpression "TARGET;${member}")
if(${targetExpression})
list(APPEND dump "TARGET ${member} found")
else()
list(APPEND dump "TARGET ${member} not found")
endif()
else()
list(APPEND dump "${member} = \"${${member}}\"")
endif()
set(isTargetExpression FALSE)
set(skipNext FALSE)
elseif("${member}" STREQUAL "TARGET")
set(isTargetExpression TRUE)
elseif("${member}" STREQUAL "STREQUAL")
set(skipNext TRUE)
else()
set(skipNext FALSE)
set(isTargetExpression FALSE)
endif()
endforeach()
string(JOIN "\n " ${expression_dump} ${dump})
set(${expression_dump} "${${expression_dump}}" PARENT_SCOPE)
endfunction()
# Stores the user provided value to FEATURE_${feature} if provided.
# If not provided, stores ${computed} instead.
# ${computed} is also stored when reconfiguring and the condition does not align with the user
# provided value.
#
function(qt_feature_check_and_save_user_provided_value resultVar feature condition computed label)
if (DEFINED "FEATURE_${feature}")
# Revisit new user provided value
set(user_value "${FEATURE_${feature}}")
set(result "${user_value}")
# If the build is marked as dirty and the user_value doesn't meet the new condition,
# reset it to the computed one.
get_property(dirty_build GLOBAL PROPERTY _qt_dirty_build)
if(NOT condition AND result AND dirty_build)
set(result "${computed}")
message(WARNING "Reset FEATURE_${feature} value to ${result}, because it doesn't \
meet its condition after reconfiguration.")
endif()
set(bool_values OFF NO FALSE N ON YES TRUE Y)
if ((result IN_LIST bool_values) OR (result GREATER_EQUAL 0))
# All good!
else()
message(FATAL_ERROR
"Sanity check failed: FEATURE_${feature} has invalid value \"${result}\"!")
endif()
# Fix-up user-provided values
set("FEATURE_${feature}" "${result}" CACHE BOOL "${label}" FORCE)
else()
# Initial setup:
set(result "${computed}")
set("FEATURE_${feature}" "${result}" CACHE BOOL "${label}")
endif()
set("${resultVar}" "${result}" PARENT_SCOPE)
endfunction()
# Saves the final user value to QT_FEATURE_${feature}, after checking that the condition is met.
macro(qt_feature_check_and_save_internal_value
feature saved_user_value condition label conditionExpression)
set(result "${saved_user_value}")
if ((NOT condition) AND result)
_qt_internal_dump_expression_values(conditionDump "${conditionExpression}")
string(JOIN " " conditionString ${conditionExpression})
qt_configure_add_report_error("Feature \"${feature}\": Forcing to \"${result}\" breaks its \
condition:\n ${conditionString}\nCondition values dump:\n ${conditionDump}\n" RECORD_ON_FEATURE_EVALUATION)
endif()
if (DEFINED "QT_FEATURE_${feature}")
message(FATAL_ERROR "Feature ${feature} is already defined when evaluating configure.cmake features for ${target}.")
endif()
set(QT_FEATURE_${feature} "${result}" CACHE INTERNAL "Qt feature: ${feature}")
# Add feature to build feature collection
list(APPEND QT_KNOWN_FEATURES "${feature}")
set(QT_KNOWN_FEATURES "${QT_KNOWN_FEATURES}" CACHE INTERNAL "" FORCE)
endmacro()
# The build system stores 2 CMake cache variables for each feature, to allow detecting value changes
# during subsequent reconfigurations.
#
#
# `FEATURE_foo` stores the user provided feature value for the current configuration run.
# It can be set directly by the user, or derived from INPUT_foo (also set by the user).
#
# If a value is not provided on initial configuration, the value will be auto-computed based on the
# various conditions of the feature.
# TODO: Document the various conditions and how they relate to each other.
#
#
# `QT_FEATURE_foo` stores the value of the feature from the previous configuration run.
# Its value is updated once with the newest user provided value after some checks are performed.
#
# This variable also serves as the main source of truth throughout the build system code to check
# if the feature is enabled, e.g. if(QT_FEATURE_foo)
#
# It is not meant to be set by the user. It is only modified by the build system.
#
# Comparing the values of QT_FEATURE_foo and FEATURE_foo, the build system can detect whether
# the user changed the value for a feature and thus recompute any dependent features.
#
function(qt_evaluate_feature feature)
# If the feature was already evaluated as dependency nothing to do here.
if(DEFINED "QT_FEATURE_${feature}")
return()
endif()
if(NOT DEFINED _QT_FEATURE_DEFINITION_${feature})
qt_debug_print_variables(DEDUP MATCH "^QT_FEATURE")
message(FATAL_ERROR "Attempting to evaluate feature ${feature} but its definition is missing. Either the feature does not exist or a dependency to the module that defines it is missing")
endif()
cmake_parse_arguments(arg
"PRIVATE;PUBLIC"
"LABEL;PURPOSE;SECTION;" "AUTODETECT;CONDITION;ENABLE;DISABLE;EMIT_IF" ${_QT_FEATURE_DEFINITION_${feature}})
if("${arg_ENABLE}" STREQUAL "")
set(arg_ENABLE OFF)
endif()
if("${arg_DISABLE}" STREQUAL "")
set(arg_DISABLE OFF)
endif()
if("${arg_AUTODETECT}" STREQUAL "")
set(arg_AUTODETECT ON)
endif()
if("${arg_CONDITION}" STREQUAL "")
set(condition ON)
else()
qt_evaluate_config_expression(condition ${arg_CONDITION})
endif()
qt_evaluate_config_expression(disable_result ${arg_DISABLE})
qt_evaluate_config_expression(enable_result ${arg_ENABLE})
qt_evaluate_config_expression(auto_detect ${arg_AUTODETECT})
if(${disable_result})
set(computed OFF)
elseif((${enable_result}) OR (${auto_detect}))
set(computed ${condition})
else()
# feature not auto-detected and not explicitly enabled
set(computed OFF)
endif()
if("${arg_EMIT_IF}" STREQUAL "")
set(emit_if ON)
else()
qt_evaluate_config_expression(emit_if ${arg_EMIT_IF})
endif()
# If FEATURE_ is not defined trying to use INPUT_ variable to enable/disable feature.
if ((NOT DEFINED "FEATURE_${feature}") AND (DEFINED "INPUT_${feature}")
AND (NOT "${INPUT_${feature}}" STREQUAL "undefined")
AND (NOT "${INPUT_${feature}}" STREQUAL ""))
if(INPUT_${feature})
set(FEATURE_${feature} ON)
else()
set(FEATURE_${feature} OFF)
endif()
endif()
# Warn about a feature which is not emitted, but the user explicitly provided a value for it.
if(NOT emit_if AND DEFINED FEATURE_${feature})
set(msg "")
string(APPEND msg
"Feature ${feature} is insignificant in this configuration, "
"ignoring related command line option(s).")
qt_configure_add_report_entry(TYPE WARNING MESSAGE "${msg}")
# Remove the cache entry so that the warning is not persisted and shown on every
# reconfiguration.
unset(FEATURE_${feature} CACHE)
endif()
# Only save the user provided value if the feature was emitted.
if(emit_if)
qt_feature_check_and_save_user_provided_value(
saved_user_value "${feature}" "${condition}" "${computed}" "${arg_LABEL}")
else()
# Make sure the feature internal value is OFF if not emitted.
set(saved_user_value OFF)
endif()
qt_feature_check_and_save_internal_value(
"${feature}" "${saved_user_value}" "${condition}" "${arg_LABEL}" "${arg_CONDITION}")
# Store each feature's label for summary info.
set(QT_FEATURE_LABEL_${feature} "${arg_LABEL}" CACHE INTERNAL "")
endfunction()
function(qt_feature_config feature config_var_name)
qt_feature_normalize_name("${feature}" feature)
qt_parse_all_arguments(arg "qt_feature_config" "NEGATE" "NAME" "" ${ARGN})
# Store all the config related info in a unique variable key.
set(key_name "_QT_FEATURE_CONFIG_DEFINITION_${feature}_${config_var_name}")
set(${key_name} "FEATURE;${feature};CONFIG_VAR_NAME;${config_var_name};${ARGN}" PARENT_SCOPE)
# Store the key for later evaluation.
list(APPEND __QtFeature_config_definitions "${key_name}")
set(__QtFeature_config_definitions ${__QtFeature_config_definitions} PARENT_SCOPE)
endfunction()
function(qt_evaluate_qmake_config_values key)
if(NOT DEFINED ${key})
qt_debug_print_variables(DEDUP MATCH "^_QT_FEATURE_CONFIG_DEFINITION")
message(FATAL_ERROR
"Attempting to evaluate feature config ${key} but its definition is missing. ")
endif()
cmake_parse_arguments(arg
"NEGATE"
"FEATURE;NAME;CONFIG_VAR_NAME"
"" ${${key}})
# If no custom name is specified, then the config value is the same as the feature name.
if(NOT arg_NAME)
set(arg_NAME "${arg_FEATURE}")
endif()
set(expected "NOT")
if (arg_NEGATE)
set(expected "")
if(arg_NAME MATCHES "^no_(.*)")
set(arg_NAME "${CMAKE_MATCH_1}")
else()
string(PREPEND arg_NAME "no_")
endif()
endif()
# The feature condition is false, there is no need to export any config values.
if(${expected} ${QT_FEATURE_${arg_FEATURE}})
return()
endif()
if(arg_CONFIG_VAR_NAME STREQUAL "QMAKE_PUBLIC_CONFIG")
list(APPEND __QtFeature_qmake_public_config "${arg_NAME}")
set(__QtFeature_qmake_public_config "${__QtFeature_qmake_public_config}" PARENT_SCOPE)
endif()
if(arg_CONFIG_VAR_NAME STREQUAL "QMAKE_PRIVATE_CONFIG")
list(APPEND __QtFeature_qmake_private_config "${arg_NAME}")
set(__QtFeature_qmake_private_config "${__QtFeature_qmake_private_config}" PARENT_SCOPE)
endif()
if(arg_CONFIG_VAR_NAME STREQUAL "QMAKE_PUBLIC_QT_CONFIG")
list(APPEND __QtFeature_qmake_public_qt_config "${arg_NAME}")
set(__QtFeature_qmake_public_qt_config "${__QtFeature_qmake_public_qt_config}" PARENT_SCOPE)
endif()
endfunction()
function(qt_feature_definition feature name)
qt_feature_normalize_name("${feature}" feature)
qt_parse_all_arguments(arg "qt_feature_definition" "NEGATE" "VALUE;PREREQUISITE" "" ${ARGN})
# Store all the define related info in a unique variable key.
set(key_name "_QT_FEATURE_DEFINE_DEFINITION_${feature}_${name}")
set(${key_name} "FEATURE;${feature};NAME;${name};${ARGN}" PARENT_SCOPE)
# Store the key for later evaluation and subsequent define generation:
list(APPEND __QtFeature_define_definitions "${key_name}")
set(__QtFeature_define_definitions ${__QtFeature_define_definitions} PARENT_SCOPE)
endfunction()
function(qt_evaluate_feature_definition key)
if(NOT DEFINED ${key})
qt_debug_print_variables(DEDUP MATCH "^_QT_FEATURE_DEFINE_DEFINITION")
message(FATAL_ERROR "Attempting to evaluate feature define ${key} but its definition is missing. ")
endif()
cmake_parse_arguments(arg
"NEGATE;"
"FEATURE;NAME;VALUE;PREREQUISITE" "" ${${key}})
set(expected ON)
if (arg_NEGATE)
set(expected OFF)
endif()
set(msg "")
if(QT_FEATURE_${arg_FEATURE} STREQUAL expected)
set(indent "")
if(arg_PREREQUISITE)
string(APPEND msg "#if ${arg_PREREQUISITE}\n")
set(indent " ")
endif()
if (arg_VALUE)
string(APPEND msg "${indent}#define ${arg_NAME} ${arg_VALUE}\n")
else()
string(APPEND msg "${indent}#define ${arg_NAME}\n")
endif()
if(arg_PREREQUISITE)
string(APPEND msg "#endif\n")
endif()
string(APPEND __QtFeature_public_extra "${msg}")
endif()
set(__QtFeature_public_extra ${__QtFeature_public_extra} PARENT_SCOPE)
endfunction()
function(qt_extra_definition name value)
qt_parse_all_arguments(arg "qt_extra_definition" "PUBLIC;PRIVATE" "" "" ${ARGN})
if (arg_PUBLIC)
string(APPEND __QtFeature_public_extra "\n#define ${name} ${value}\n")
elseif(arg_PRIVATE)
string(APPEND __QtFeature_private_extra "\n#define ${name} ${value}\n")
endif()
set(__QtFeature_public_extra ${__QtFeature_public_extra} PARENT_SCOPE)
set(__QtFeature_private_extra ${__QtFeature_private_extra} PARENT_SCOPE)
endfunction()
function(qt_internal_generate_feature_line line feature)
string(TOUPPER "${QT_FEATURE_${feature}}" value)
if (value STREQUAL "ON")
set(line "#define QT_FEATURE_${feature} 1\n\n" PARENT_SCOPE)
elseif(value STREQUAL "OFF")
set(line "#define QT_FEATURE_${feature} -1\n\n" PARENT_SCOPE)
elseif(value STREQUAL "UNSET")
set(line "#define QT_FEATURE_${feature} 0\n\n" PARENT_SCOPE)
else()
message(FATAL_ERROR "${feature} has unexpected value \"${QT_FEATURE_${feature}}\"! "
"Valid values are ON, OFF and UNSET.")
endif()
endfunction()
function(qt_internal_feature_write_file file features extra)
set(contents "")
foreach(it ${features})
qt_internal_generate_feature_line(line "${it}")
string(APPEND contents "${line}")
endforeach()
string(APPEND contents "${extra}")
file(GENERATE OUTPUT "${file}" CONTENT "${contents}")
endfunction()
# Helper function which evaluates features from a given list of configure.cmake paths
# and creates the feature cache entries.
# Should not be used directly, unless features need to be available in a directory scope before the
# associated module evaluates the features.
# E.g. qtbase/src.pro needs access to Core features before src/corelib/CMakeLists.txt is parsed.
function(qt_feature_evaluate_features list_of_paths)
qt_feature_module_begin(ONLY_EVALUATE_FEATURES)
foreach(path ${list_of_paths})
include("${path}")
endforeach()
qt_feature_module_end(ONLY_EVALUATE_FEATURES)
endfunction()
function(qt_feature_record_summary_entries list_of_paths)
# Clean up any stale state just in case.
qt_feature_unset_state_vars()
set(__QtFeature_only_record_summary_entries TRUE)
foreach(path ${list_of_paths})
include("${path}")
endforeach()
qt_feature_unset_state_vars()
endfunction()
function(qt_feature_module_end)
set(flags ONLY_EVALUATE_FEATURES)
set(options OUT_VAR_PREFIX)
set(multiopts)
cmake_parse_arguments(arg "${flags}" "${options}" "${multiopts}" ${ARGN})
set(target ${arg_UNPARSED_ARGUMENTS})
# The value of OUT_VAR_PREFIX is used as a prefix for output variables that should be
# set in the parent scope.
if(NOT arg_OUT_VAR_PREFIX)
set(arg_OUT_VAR_PREFIX "")
endif()
set(all_features ${__QtFeature_public_features} ${__QtFeature_private_features} ${__QtFeature_internal_features})
list(REMOVE_DUPLICATES all_features)
foreach(feature ${all_features})
qt_evaluate_feature(${feature})
endforeach()
# Evaluate custom cache assignments.
foreach(cache_var_name ${__QtFeature_custom_enabled_cache_variables})
set(${cache_var_name} ON CACHE BOOL "Force enabled by platform requirements." FORCE)
endforeach()
foreach(cache_var_name ${__QtFeature_custom_disabled_cache_variables})
set(${cache_var_name} OFF CACHE BOOL "Force disabled by platform requirements." FORCE)
endforeach()
set(enabled_public_features "")
set(disabled_public_features "")
set(enabled_private_features "")
set(disabled_private_features "")
foreach(feature ${__QtFeature_public_features})
if(QT_FEATURE_${feature})
list(APPEND enabled_public_features ${feature})
else()
list(APPEND disabled_public_features ${feature})
endif()
endforeach()
foreach(feature ${__QtFeature_private_features})
if(QT_FEATURE_${feature})
list(APPEND enabled_private_features ${feature})
else()
list(APPEND disabled_private_features ${feature})
endif()
endforeach()
foreach(key ${__QtFeature_config_definitions})
qt_evaluate_qmake_config_values(${key})
unset(${key} PARENT_SCOPE)
endforeach()
foreach(key ${__QtFeature_define_definitions})
qt_evaluate_feature_definition(${key})
unset(${key} PARENT_SCOPE)
endforeach()
foreach(feature ${all_features})
unset(_QT_FEATURE_DEFINITION_${feature} PARENT_SCOPE)
endforeach()
if(NOT arg_ONLY_EVALUATE_FEATURES)
qt_internal_feature_write_file("${CMAKE_CURRENT_BINARY_DIR}/${__QtFeature_private_file}"
"${__QtFeature_private_features}" "${__QtFeature_private_extra}"
)
qt_internal_feature_write_file("${CMAKE_CURRENT_BINARY_DIR}/${__QtFeature_public_file}"
"${__QtFeature_public_features}" "${__QtFeature_public_extra}"
)
endif()
# Extra header injections which have to have forwarding headers created by
# qt_install_injections.
# Skip creating forwarding headers if qt_feature_module_begin was called with NO_MODULE, aka
# there is no include/<module_name> so there's no place to put the forwarding headers.
if(__QtFeature_library)
set(injections "")
qt_compute_injection_forwarding_header("${__QtFeature_library}"
SOURCE "${__QtFeature_public_file}"
OUT_VAR injections)
qt_compute_injection_forwarding_header("${__QtFeature_library}"
SOURCE "${__QtFeature_private_file}" PRIVATE
OUT_VAR injections)
set(${arg_OUT_VAR_PREFIX}extra_library_injections ${injections} PARENT_SCOPE)
endif()
if (NOT ("${target}" STREQUAL "NO_MODULE") AND NOT arg_ONLY_EVALUATE_FEATURES)
get_target_property(targetType "${target}" TYPE)
if("${targetType}" STREQUAL "INTERFACE_LIBRARY")
set(propertyPrefix "INTERFACE_")
else()
set(propertyPrefix "")
set_property(TARGET "${target}" APPEND PROPERTY EXPORT_PROPERTIES "QT_ENABLED_PUBLIC_FEATURES;QT_DISABLED_PUBLIC_FEATURES;QT_ENABLED_PRIVATE_FEATURES;QT_DISABLED_PRIVATE_FEATURES;MODULE_PLUGIN_TYPES;QT_QMAKE_PUBLIC_CONFIG;QT_QMAKE_PRIVATE_CONFIG;QT_QMAKE_PUBLIC_QT_CONFIG")
endif()
foreach(visibility public private)
string(TOUPPER "${visibility}" capitalVisibility)
foreach(state enabled disabled)
string(TOUPPER "${state}" capitalState)
set_property(TARGET "${target}" PROPERTY ${propertyPrefix}QT_${capitalState}_${capitalVisibility}_FEATURES "${${state}_${visibility}_features}")
endforeach()
endforeach()
set_property(TARGET "${target}"
PROPERTY ${propertyPrefix}QT_QMAKE_PUBLIC_CONFIG
"${__QtFeature_qmake_public_config}")
set_property(TARGET "${target}"
PROPERTY ${propertyPrefix}QT_QMAKE_PRIVATE_CONFIG
"${__QtFeature_qmake_private_config}")
set_property(TARGET "${target}"
PROPERTY ${propertyPrefix}QT_QMAKE_PUBLIC_QT_CONFIG
"${__QtFeature_qmake_public_qt_config}")
# Config values were the old-school features before actual configure.json features were
# implemented. Therefore "CONFIG+=foo" values should be considered features as well,
# so that CMake can find them when building qtmultimedia for example.
if(__QtFeature_qmake_public_config)
set_property(TARGET "${target}"
APPEND PROPERTY ${propertyPrefix}QT_ENABLED_PUBLIC_FEATURES
${__QtFeature_qmake_public_config})
endif()
if(__QtFeature_qmake_private_config)
set_property(TARGET "${target}"
APPEND PROPERTY ${propertyPrefix}QT_ENABLED_PRIVATE_FEATURES
${__QtFeature_qmake_private_config})
endif()
if(__QtFeature_qmake_public_qt_config)
set_property(TARGET "${target}"
APPEND PROPERTY ${propertyPrefix}QT_ENABLED_PUBLIC_FEATURES
${__QtFeature_qmake_public_qt_config})
endif()
qt_feature_copy_global_config_features_to_core(${target})
endif()
qt_feature_unset_state_vars()
endfunction()
macro(qt_feature_unset_state_vars)
unset(__QtFeature_library PARENT_SCOPE)
unset(__QtFeature_public_features PARENT_SCOPE)
unset(__QtFeature_private_features PARENT_SCOPE)
unset(__QtFeature_internal_features PARENT_SCOPE)
unset(__QtFeature_private_file PARENT_SCOPE)
unset(__QtFeature_public_file PARENT_SCOPE)
unset(__QtFeature_private_extra PARENT_SCOPE)
unset(__QtFeature_public_extra PARENT_SCOPE)
unset(__QtFeature_define_definitions PARENT_SCOPE)
unset(__QtFeature_custom_enabled_features PARENT_SCOPE)
unset(__QtFeature_custom_disabled_features PARENT_SCOPE)
unset(__QtFeature_only_evaluate_features PARENT_SCOPE)
unset(__QtFeature_only_record_summary_entries PARENT_SCOPE)
endmacro()
function(qt_feature_copy_global_config_features_to_core target)
# CMake doesn't support setting custom properties on exported INTERFACE libraries
# See https://gitlab.kitware.com/cmake/cmake/issues/19261.
# To circumvent that, copy the properties from GlobalConfig to Core target.
# This way the global features actually get set in the generated CoreTargets.cmake file.
if(target STREQUAL Core)
foreach(visibility public private)
string(TOUPPER "${visibility}" capitalVisibility)
foreach(state enabled disabled)
string(TOUPPER "${state}" capitalState)
set(core_property_name "QT_${capitalState}_${capitalVisibility}_FEATURES")
set(global_property_name "INTERFACE_${core_property_name}")
get_property(core_values TARGET Core PROPERTY ${core_property_name})
get_property(global_values TARGET GlobalConfig PROPERTY ${global_property_name})
set(total_values ${core_values} ${global_values})
set_property(TARGET Core PROPERTY ${core_property_name} ${total_values})
endforeach()
endforeach()
set(config_property_names
QT_QMAKE_PUBLIC_CONFIG QT_QMAKE_PRIVATE_CONFIG QT_QMAKE_PUBLIC_QT_CONFIG )
foreach(property_name ${config_property_names})
set(core_property_name "${property_name}")
set(global_property_name "INTERFACE_${core_property_name}")
get_property(core_values TARGET Core PROPERTY ${core_property_name})
get_property(global_values TARGET GlobalConfig PROPERTY ${global_property_name})
set(total_values ${core_values} ${global_values})
set_property(TARGET Core PROPERTY ${core_property_name} ${total_values})
endforeach()
endif()
endfunction()
function(qt_config_compile_test name)
if(DEFINED "TEST_${name}")
return()
endif()
cmake_parse_arguments(arg "" "LABEL;PROJECT_PATH;C_STANDARD;CXX_STANDARD"
"COMPILE_OPTIONS;LIBRARIES;CODE;PACKAGES;CMAKE_FLAGS" ${ARGN})
if(arg_PROJECT_PATH)
message(STATUS "Performing Test ${arg_LABEL}")
set(flags "")
qt_get_platform_try_compile_vars(platform_try_compile_vars)
list(APPEND flags ${platform_try_compile_vars})
# If the repo has its own cmake modules, include those in the module path, so that various
# find_package calls work.
if(EXISTS "${PROJECT_SOURCE_DIR}/cmake")
list(APPEND flags "-DCMAKE_MODULE_PATH:STRING=${PROJECT_SOURCE_DIR}/cmake")
endif()
# Pass which packages need to be found.
if(arg_PACKAGES)
set(packages_list "")
# Parse the package names, version, etc. An example would be:
# PACKAGE Foo 6 REQUIRED
# PACKAGE Bar 2 COMPONENTS Baz
foreach(p ${arg_PACKAGES})
if(p STREQUAL PACKAGE)
if(package_entry)
# Encode the ";" into "\;" to separate the arguments of a find_package call.
string(REPLACE ";" "\\;" package_entry_string "${package_entry}")
list(APPEND packages_list "${package_entry_string}")
endif()
set(package_entry "")
else()
list(APPEND package_entry "${p}")
endif()
endforeach()
# Parse final entry.
if(package_entry)
string(REPLACE ";" "\\;" package_entry_string "${package_entry}")
list(APPEND packages_list "${package_entry_string}")
endif()
# Encode the ";" again.
string(REPLACE ";" "\\;" packages_list "${packages_list}")
# The flags are separated by ';', the find_package entries by '\;',
# and the package parts of an entry by '\\;'.
# Example:
# WrapFoo\\;6\\;COMPONENTS\\;bar\;WrapBaz\\;5
list(APPEND flags "-DQT_CONFIG_COMPILE_TEST_PACKAGES:STRING=${packages_list}")
# Inside the project, the value of QT_CONFIG_COMPILE_TEST_PACKAGES is used in a foreach
# loop that calls find_package() for each package entry, and thus the variable expansion
# ends up calling something like find_package(WrapFoo;6;COMPONENTS;bar) aka
# find_package(WrapFoo 6 COMPONENTS bar).
endif()
# Pass which libraries need to be linked against.
if(arg_LIBRARIES)
set(link_flags "")
set(library_targets "")
# Separate targets from link flags or paths. This is to prevent configuration failures
# when the targets are not found due to missing packages.
foreach(lib ${arg_LIBRARIES})
string(FIND "${lib}" "::" is_library_target)
if(is_library_target EQUAL -1)
list(APPEND link_flags "${lib}")
else()
list(APPEND library_targets "${lib}")
endif()
endforeach()
if(link_flags)
list(APPEND flags "-DQT_CONFIG_COMPILE_TEST_LIBRARIES:STRING=${link_flags}")
endif()
if(library_targets)
list(APPEND flags
"-DQT_CONFIG_COMPILE_TEST_LIBRARY_TARGETS:STRING=${library_targets}")
endif()
endif()
if(NOT arg_CMAKE_FLAGS)
set(arg_CMAKE_FLAGS "")
endif()
try_compile(HAVE_${name} "${CMAKE_BINARY_DIR}/config.tests/${name}" "${arg_PROJECT_PATH}"
"${name}" CMAKE_FLAGS ${flags} ${arg_CMAKE_FLAGS})
if(${HAVE_${name}})
set(status_label "Success")
else()
set(status_label "Failed")
endif()
message(STATUS "Performing Test ${arg_LABEL} - ${status_label}")
else()
foreach(library IN ITEMS ${arg_LIBRARIES})
if(NOT TARGET "${library}")
# If the dependency looks like a cmake target, then make this compile test
# fail instead of cmake abort later via CMAKE_REQUIRED_LIBRARIES.
string(FIND "${library}" "::" cmake_target_namespace_separator)
if(NOT cmake_target_namespace_separator EQUAL -1)
set(HAVE_${name} FALSE)
break()
endif()
endif()
endforeach()
if(NOT DEFINED HAVE_${name})
set(_save_CMAKE_C_STANDARD "${CMAKE_C_STANDARD}")
set(_save_CMAKE_CXX_STANDARD "${CMAKE_CXX_STANDARD}")
set(_save_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
if(arg_C_STANDARD)
set(CMAKE_C_STANDARD "${arg_C_STANDARD}")
endif()
if(arg_CXX_STANDARD)
set(CMAKE_CXX_STANDARD "${arg_CXX_STANDARD}")
endif()
set(CMAKE_REQUIRED_FLAGS ${arg_COMPILE_OPTIONS})
# For MSVC we need to explicitly pass -Zc:__cplusplus to get correct __cplusplus
# define values. According to common/msvc-version.conf the flag is supported starting
# with 1913.
# https://developercommunity.visualstudio.com/content/problem/139261/msvc-incorrectly-defines-cplusplus.html
# No support for the flag in upstream CMake as of 3.17.
# https://gitlab.kitware.com/cmake/cmake/issues/18837
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND MSVC_VERSION GREATER_EQUAL 1913)
list(APPEND CMAKE_REQUIRED_FLAGS "-Zc:__cplusplus")
endif()
set(_save_CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
set(CMAKE_REQUIRED_LIBRARIES "${arg_LIBRARIES}")
check_cxx_source_compiles("${arg_UNPARSED_ARGUMENTS} ${arg_CODE}" HAVE_${name})
set(CMAKE_REQUIRED_LIBRARIES "${_save_CMAKE_REQUIRED_LIBRARIES}")
set(CMAKE_C_STANDARD "${_save_CMAKE_C_STANDARD}")
set(CMAKE_CXX_STANDARD "${_save_CMAKE_CXX_STANDARD}")
set(CMAKE_REQUIRED_FLAGS "${_save_CMAKE_REQUIRED_FLAGS}")
endif()
endif()
set(TEST_${name} "${HAVE_${name}}" CACHE INTERNAL "${arg_LABEL}")
endfunction()
# This function should be used for passing required try compile platform variables to the
# project-based try_compile() call.
# out_var will be a list of -Dfoo=bar strings, suitable to pass to CMAKE_FLAGS.
function(qt_get_platform_try_compile_vars out_var)
# Use the regular variables that are used for source-based try_compile() calls.
set(flags "${CMAKE_TRY_COMPILE_PLATFORM_VARIABLES}")
# Pass toolchain files.
if(CMAKE_TOOLCHAIN_FILE)
list(APPEND flags "CMAKE_TOOLCHAIN_FILE")
endif()
if(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
list(APPEND flags "VCPKG_CHAINLOAD_TOOLCHAIN_FILE")
endif()
# Pass language standard flags.
list(APPEND flags "CMAKE_C_STANDARD")
list(APPEND flags "CMAKE_CXX_STANDARD")
# Assemble the list with regular options.
set(flags_cmd_line "")
foreach(flag ${flags})
if(${flag})
list(APPEND flags_cmd_line "-D${flag}=${${flag}}")
endif()
endforeach()
# Pass darwin specific options.
# The architectures need to be passed explicitly to project-based try_compile calls even on
# macOS, so that arm64 compilation works on Apple silicon.
qt_internal_get_first_osx_arch(osx_first_arch)
if(osx_first_arch)
# Do what qmake does, aka when doing a simulator_and_device build, build the
# target architecture test only with the first given architecture, which should be the
# device architecture, aka some variation of "arm" (armv7, arm64).
list(APPEND flags_cmd_line "-DCMAKE_OSX_ARCHITECTURES:STRING=${osx_first_arch}")
endif()
if(UIKIT)
# Specify the sysroot, but only if not doing a simulator_and_device build.
# So keep the sysroot empty for simulator_and_device builds.
if(QT_UIKIT_SDK)
list(APPEND flags_cmd_line "-DCMAKE_OSX_SYSROOT:STRING=${QT_UIKIT_SDK}")
endif()
endif()
set("${out_var}" "${flags_cmd_line}" PARENT_SCOPE)
endfunction()
# Set out_var to the first value of CMAKE_OSX_ARCHITECTURES.
# Sets an empty string if no architecture is present.
function(qt_internal_get_first_osx_arch out_var)
set(value "")
if(CMAKE_OSX_ARCHITECTURES)
list(GET CMAKE_OSX_ARCHITECTURES 0 value)
endif()
set(${out_var} "${value}" PARENT_SCOPE)
endfunction()
function(qt_config_compile_test_x86simd extension label)
if (DEFINED TEST_X86SIMD_${extension})
return()
endif()
set(flags "-DSIMD:string=${extension}")
qt_get_platform_try_compile_vars(platform_try_compile_vars)
list(APPEND flags ${platform_try_compile_vars})
message(STATUS "Performing SIMD Test ${label}")
try_compile("TEST_X86SIMD_${extension}"
"${CMAKE_CURRENT_BINARY_DIR}/config.tests/x86_simd_${extension}"
"${CMAKE_CURRENT_SOURCE_DIR}/config.tests/x86_simd"
x86_simd
CMAKE_FLAGS ${flags})
if(${TEST_X86SIMD_${extension}})
set(status_label "Success")
else()
set(status_label "Failed")
endif()
message(STATUS "Performing SIMD Test ${label} - ${status_label}")
set(TEST_subarch_${extension} "${TEST_X86SIMD_${extension}}" CACHE INTERNAL "${label}")
endfunction()
function(qt_config_compile_test_machine_tuple label)
if(DEFINED TEST_MACHINE_TUPLE OR NOT LINUX OR ANDROID)
return()
endif()
message(STATUS "Performing Test ${label}")
execute_process(COMMAND "${CMAKE_CXX_COMPILER}" -dumpmachine
OUTPUT_VARIABLE output
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE exit_code)
if(exit_code EQUAL 0)
set(status_label "Success")
else()
set(status_label "Failed")
endif()
message(STATUS "Performing Test ${label} - ${status_label}")
set(TEST_machine_tuple "${output}" CACHE INTERNAL "${label}")
endfunction()
function(qt_config_compiler_supports_flag_test name)
if(DEFINED "TEST_${name}")
return()
endif()
cmake_parse_arguments(arg "" "LABEL;FLAG" "" ${ARGN})
check_cxx_compiler_flag("${arg_FLAG}" TEST_${name})
set(TEST_${name} "${TEST_${name}}" CACHE INTERNAL "${label}")
endfunction()
function(qt_config_linker_supports_flag_test name)
if(DEFINED "TEST_${name}")
return()
endif()
cmake_parse_arguments(arg "" "LABEL;FLAG" "" ${ARGN})
set(flags "-Wl,${arg_FLAG}")
# Select the right linker.
if(GCC OR CLANG)
if(QT_FEATURE_use_gold_linker)
list(PREPEND flags "-fuse-ld=gold")
elseif(QT_FEATURE_use_bfd_linker)
list(PREPEND flags "-fuse-ld=bfd")
elseif(QT_FEATURE_use_lld_linker)
list(PREPEND flags "-fuse-ld=lld")
endif()
endif()
set(CMAKE_REQUIRED_LINK_OPTIONS ${flags})
check_cxx_source_compiles("int main() { return 0; }" TEST_${name})
set(TEST_${name} "${TEST_${name}}" CACHE INTERNAL "${label}")
endfunction()
function(qt_make_features_available target)
if(NOT "${target}" MATCHES "^${QT_CMAKE_EXPORT_NAMESPACE}::[a-zA-Z0-9_-]*$")
message(FATAL_ERROR "${target} does not match ${QT_CMAKE_EXPORT_NAMESPACE}::[a-zA-Z0-9_-]*. INVALID NAME.")
endif()
if(NOT TARGET ${target})
message(FATAL_ERROR "${target} not found.")
endif()
get_target_property(target_type "${target}" TYPE)
if("${target_type}" STREQUAL "INTERFACE_LIBRARY")
set(property_prefix "INTERFACE_")
else()
set(property_prefix "")
endif()
foreach(visibility IN ITEMS PUBLIC PRIVATE)
set(value ON)
foreach(state IN ITEMS ENABLED DISABLED)
get_target_property(features "${target}" ${property_prefix}QT_${state}_${visibility}_FEATURES)
if("${features}" STREQUAL "features-NOTFOUND")
continue()
endif()
foreach(feature IN ITEMS ${features})
if (DEFINED "QT_FEATURE_${feature}" AND NOT "${QT_FEATURE_${feature}}" STREQUAL "${value}")
message(FATAL_ERROR "Feature ${feature} is already defined to be \"${QT_FEATURE_${feature}}\" and should now be set to \"${value}\" when importing features from ${target}.")
endif()
set(QT_FEATURE_${feature} "${value}" CACHE INTERNAL "Qt feature: ${feature} (from target ${target})")
endforeach()
set(value OFF)
endforeach()
endforeach()
endfunction()
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