function(qt_internal_add_linker_version_script target) qt_parse_all_arguments(arg "qt_internal_add_linker" "INTERNAL" "" "PRIVATE_HEADERS" ${ARGN}) if (TEST_ld_version_script) if (arg_INTERNAL) set(contents "Qt_${PROJECT_VERSION_MAJOR}_PRIVATE_API { *; };") else() set(contents "Qt_${PROJECT_VERSION_MAJOR}_PRIVATE_API {\n qt_private_api_tag*;\n") foreach(ph ${arg_PRIVATE_HEADERS}) string(APPEND contents " @FILE:${ph}@\n") endforeach() string(APPEND contents "};\n") set(current "Qt_${PROJECT_VERSION_MAJOR}") if (QT_NAMESPACE STREQUAL "") set(tag_symbol "qt_version_tag") else() set(tag_symbol "qt_version_tag_${QT_NAMESPACE}") endif() string(APPEND contents "${current} { *; };\n") foreach(minor_version RANGE ${PROJECT_VERSION_MINOR}) set(previous "${current}") set(current "Qt_${PROJECT_VERSION_MAJOR}.${minor_version}") if (minor_version EQUAL ${PROJECT_VERSION_MINOR}) string(APPEND contents "${current} { ${tag_symbol}; } ${previous};\n") else() string(APPEND contents "${current} {} ${previous};\n") endif() endforeach() set(infile "${CMAKE_CURRENT_BINARY_DIR}/${target}.version.in") set(outfile "${CMAKE_CURRENT_BINARY_DIR}/${target}.version") file(GENERATE OUTPUT "${infile}" CONTENT "${contents}") qt_ensure_perl() add_custom_command(TARGET "${target}" PRE_LINK COMMAND "${HOST_PERL}" "${QT_MKSPECS_DIR}/features/data/unix/findclasslist.pl" < "${infile}" > "${outfile}" BYPRODUCTS "${outfile}" DEPENDS "${infile}" WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}" COMMENT "Generating version linker script" ) target_link_options("${target}" PRIVATE "-Wl,--version-script,${outfile}") endif() endif() endfunction() function(qt_internal_add_link_flags_no_undefined target) if (NOT QT_BUILD_SHARED_LIBS) return() endif() if (GCC OR CLANG) 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) list(FIND possible_visibilities "${visibility}" known_visibility) if (known_visibility EQUAL "-1") message(FATAL_ERROR "Visibitily setting must be one of PRIVATE, INTERFACE or PUBLIC.") endif() if ((GCC OR CLANG) AND NOT EMSCRIPTEN AND NOT UIKIT) if(APPLE) set(gc_sections_flag "-Wl,-dead_strip") elseif(SOLARIS) set(gc_sections_flag "-Wl,-z,ignore") elseif(LINUX OR BSD OR WIN32 OR ANDROID) set(gc_sections_flag "-Wl,--gc-sections") endif() endif() if(gc_sections_flag) target_link_options("${target}" ${visibility} "${gc_sections_flag}") endif() if((GCC OR CLANG OR ICC) AND NOT EMSCRIPTEN AND NOT UIKIT) set(split_sections_flags "-ffunction-sections" "-fdata-sections") endif() if(split_sections_flags) target_compile_options("${target}" ${visibility} ${split_sections_flags}) endif() endfunction() function(qt_internal_apply_intel_cet target visibility) if(NOT QT_FEATURE_intelcet) return() endif() set(possible_visibilities PRIVATE INTERFACE PUBLIC) list(FIND possible_visibilities "${visibility}" known_visibility) if (known_visibility EQUAL "-1") message(FATAL_ERROR "Visibitily setting must be one of PRIVATE, INTERFACE or PUBLIC.") endif() if(GCC) set(flags "-mshstk") endif() if(flags) target_compile_options("${target}" ${visibility} "${flags}") endif() endfunction() function(qt_internal_library_deprecation_level result) if(WIN32) # On Windows, due to the way DLLs work, we need to export all functions, # including the inlines list(APPEND deprecations "QT_DISABLE_DEPRECATED_BEFORE=0x040800") else() # On other platforms, Qt's own compilation goes needs to compile the Qt 5.0 API list(APPEND deprecations "QT_DISABLE_DEPRECATED_BEFORE=0x050000") endif() list(APPEND deprecations "QT_DEPRECATED_WARNINGS_SINCE=0x060000") set("${result}" deprecations PARENT_SCOPE) endfunction() # Sets the exceptions flags for the given target function(qt_internal_set_no_exceptions_flags target) target_compile_definitions("${target}" PRIVATE "QT_NO_EXCEPTIONS") if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC") target_compile_options("${target}" PRIVATE "/wd4530" "/wd4577") elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU") target_compile_options("${target}" PRIVATE "-fno-exceptions") elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang") target_compile_options("${target}" PRIVATE "-fno-exceptions") elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") target_compile_options("${target}" PRIVATE "-fno-exceptions") elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel") target_compile_options("${target}" PRIVATE "-fno-exceptions") endif() endfunction() function(qt_skip_warnings_are_errors target) 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 ON) endfunction() function(qt_skip_warnings_are_errors_when_repo_unclean target) if(QT_REPO_NOT_WARNINGS_CLEAN) qt_skip_warnings_are_errors("${target}") endif() endfunction() function(qt_disable_warnings target) get_target_property(target_type "${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("${target}" "hidden") endfunction() function(qt_set_language_standards) ## Use the latest standard the compiler supports (same as qt_common.prf) if (QT_FEATURE_cxx2a) set(CMAKE_CXX_STANDARD 20 PARENT_SCOPE) else() set(CMAKE_CXX_STANDARD 17 PARENT_SCOPE) endif() if (c_std_11 IN_LIST CMAKE_C_COMPILE_FEATURES) set(CMAKE_C_STANDARD 11 PARENT_SCOPE) elseif (c_std_99 IN_LIST CMAKE_C_COMPILE_FEATURES) set(CMAKE_C_STANDARD 99 PARENT_SCOPE) endif() endfunction() function(qt_set_language_standards_interface_compile_features target) # Regardless of which C++ standard is used to build Qt itself, require C++17 when building # Qt applications using CMake (because the Qt header files use C++17 features). set(cpp_feature "cxx_std_17") target_compile_features("${target}" INTERFACE ${cpp_feature}) endfunction() function(qt_enable_msvc_cplusplus_define target visibility) # For MSVC we need to explicitly pass -Zc:__cplusplus to get correct __cplusplus. # Check qt_config_compile_test for more info. if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND MSVC_VERSION GREATER_EQUAL 1913) target_compile_options("${target}" ${visibility} "-Zc:__cplusplus") endif() endfunction() function(qt_enable_utf8_sources target) set(utf8_flags "") if(MSVC) list(APPEND utf8_flags "-utf-8") elseif(WIN32 AND ICC) list(APPEND utf8_flags "-Qoption,cpp,--unicode_source_kind,UTF-8") endif() if(utf8_flags) # Allow opting out by specifying the QT_NO_UTF8_SOURCE target property. set(genex_condition "$>>") set(utf8_flags "$<${genex_condition}:${utf8_flags}>") target_compile_options("${target}" INTERFACE "${utf8_flags}") endif() endfunction() 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() function(qt_internal_print_optimization_flags_values 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() # This function finds the optimization flags set by the default CMake modules or toolchains, and # replaces them with ones that Qt qmake builds expect for all the default CMAKE_BUILD_TYPE # configurations. # This normalizes things like using -O2 for both Release and RelWithDebInfo, among other flags. # See QTBUG-85992 for details. function(qt_internal_set_up_config_optimizations_like_in_qmake) # Allow opt out. if(QT_USE_DEFAULT_CMAKE_OPTIMIZATION_FLAGS) return() endif() # 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 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(configs RELEASE RELWITHDEBINFO MINSIZEREL DEBUG) set(target_link_types EXE SHARED MODULE STATIC) # Opt into additional non-standard configs for flag removal only. if(QT_ADDITIONAL_OPTIMIZATION_FLAG_CONFIGS) list(APPEND configs ${QT_ADDITIONAL_OPTIMIZATION_FLAG_CONFIGS}) endif() # You can set QT_DEBUG_OPTIMIZATION_FLAGS to see the before and after results. if(QT_DEBUG_OPTIMIZATION_FLAGS) message(STATUS "") message(STATUS "DEBUG: Original CMake optimization flags.\n") qt_internal_print_optimization_flags_values("${enabled_languages}" "${configs}" "${target_link_types}") endif() # Remove known optimization flags. qt_internal_get_all_possible_optimization_flag_values(flag_values) foreach(lang ${enabled_languages}) foreach(config ${configs}) set(flag_var_name "CMAKE_${lang}_FLAGS_${config}") foreach(flag_value ${flag_values}) # Remove any existing optimization flags, they will be re-added later on. string(REPLACE "${flag_value}" "" "${flag_var_name}" "${${flag_var_name}}") string(STRIP "${${flag_var_name}}" "${flag_var_name}") endforeach() endforeach() endforeach() # Re-add optimization flags as per qmake mkspecs. foreach(lang ${enabled_languages}) foreach(config ${configs}) set(flag_var_name "CMAKE_${lang}_FLAGS_${config}") # Release and RelWithDebInfo should get the same base optimization flags. if(config STREQUAL "RELEASE" AND QT_CFLAGS_OPTIMIZE) string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE}") elseif(config STREQUAL "RELWITHDEBINFO" AND QT_CFLAGS_OPTIMIZE) string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE}") # MinSizeRel should get the optimize size flag if available, otherwise the regular # release flag. elseif(config STREQUAL "MINSIZEREL") if(QT_CFLAGS_OPTIMIZE_SIZE) string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE_SIZE}") else() string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE}") endif() endif() # Debug should get the OPTIMIZE_DEBUG flag if the respective feature is ON. if(config STREQUAL "DEBUG" AND QT_FEATURE_optimize_debug) string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE_DEBUG}") endif() set(configs_for_optimize_size RELEASE RELWITHDEBINFO) if(QT_FEATURE_optimize_size AND config IN_LIST configs_for_optimize_size) string(APPEND "${flag_var_name}" " ${QT_CFLAGS_OPTIMIZE_SIZE}") endif() # Assign value to the cache entry. get_property(help_text CACHE "${flag_var_name}" PROPERTY HELPSTRING) set("${flag_var_name}" "${${flag_var_name}}" CACHE STRING "${help_text}" FORCE) endforeach() endforeach() if(MSVC) # Handle MSVC /INCREMENTAL flag which should not be enabled for Release configurations. # First remove them from all configs, and re-add INCREMENTAL for Debug only. set(flag_values "/INCREMENTAL:YES" "/INCREMENTAL:NO" "/INCREMENTAL") foreach(config ${configs}) foreach(t ${target_link_types}) set(flag_var_name "CMAKE_${t}_LINKER_FLAGS_${config}") foreach(flag_value ${flag_values}) string(REPLACE "${flag_value}" "" "${flag_var_name}" "${${flag_var_name}}") string(STRIP "${${flag_var_name}}" "${flag_var_name}") endforeach() endforeach() endforeach() foreach(config ${configs}) foreach(t ${target_link_types}) set(flag_var_name "CMAKE_${t}_LINKER_FLAGS_${config}") if(config STREQUAL "RELEASE" OR config STREQUAL "RELWITHDEBINFO" OR config STREQUAL "MINSIZEREL") string(APPEND "${flag_var_name}" " /INCREMENTAL:NO") endif() # Assign value to the cache entry. get_property(help_text CACHE "${flag_var_name}" PROPERTY HELPSTRING) set("${flag_var_name}" "${${flag_var_name}}" CACHE STRING "${help_text}" FORCE) endforeach() endforeach() endif() if(QT_DEBUG_OPTIMIZATION_FLAGS) message(STATUS "") message(STATUS "DEBUG: Modified optimization flags to mirror qmake mkspecs.\n") qt_internal_print_optimization_flags_values("${enabled_languages}" "${configs}" "${target_link_types}") endif() endfunction()