mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-26 06:07:04 +08:00
335 lines
15 KiB
CMake
335 lines
15 KiB
CMake
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# Copyright (C) 2022 The Qt Company Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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# Add libraries to variable ${out_libs_var} in a way that duplicates
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# are added at the end. This ensures the library order needed for the
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# linker.
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function(__qt_internal_merge_libs out_libs_var)
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foreach(dep ${ARGN})
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list(REMOVE_ITEM ${out_libs_var} ${dep})
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list(APPEND ${out_libs_var} ${dep})
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endforeach()
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set(${out_libs_var} ${${out_libs_var}} PARENT_SCOPE)
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endfunction()
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# Extracts value from per-target dict key and assigns it to out_var.
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# Assumes dict_name to be an existing INTERFACE target.
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function(__qt_internal_get_dict_key_values out_var target_infix dict_name dict_key)
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get_target_property(values "${dict_name}" "INTERFACE_${target_infix}_${dict_key}")
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set(${out_var} "${values}" PARENT_SCOPE)
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endfunction()
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# Assigns 'values' to per-target dict key, including for aliases of the target.
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# Assumes dict_name to be an existing INTERFACE target.
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function(__qt_internal_memoize_values_in_dict target dict_name dict_key values)
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# Memoize the computed values for the target as well as its aliases.
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#
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# Aka assigns the contents of ${values} to INTERFACE_Core, INTERFACE_Qt::Core,
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# INTERFACE_Qt6::Core.
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#
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# Yes, i know it's crazy that target names are legal property names.
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#
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# Assigning for library aliases is needed to avoid multiple recomputation of values.
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# Scenario in the context of __qt_internal_walk_libs:
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# 'values' are computed for Core target and memoized to INTERFACE_Core.
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# When processing Gui, it depends on Qt::Core, but there are no values for INTERFACE_Qt::Core.
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set_target_properties(${dict_name} PROPERTIES INTERFACE_${target}_${dict_key} "${values}")
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get_target_property(versionless_alias "${target}" "_qt_versionless_alias")
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if(versionless_alias)
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__qt_internal_get_dict_key_values(
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versionless_values "${versionless_alias}" "${dict_name}" "${dict_key}")
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if(versionless_values MATCHES "-NOTFOUND$")
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set_target_properties(${dict_name}
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PROPERTIES INTERFACE_${versionless_alias}_${dict_key} "${values}")
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endif()
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endif()
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get_target_property(versionfull_alias "${target}" "_qt_versionfull_alias")
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if(versionfull_alias)
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__qt_internal_get_dict_key_values(
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versionfull_values "${versionfull_alias}" "${dict_name}" "${dict_key}")
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if(versionfull_values MATCHES "-NOTFOUND$")
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set_target_properties(${dict_name}
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PROPERTIES INTERFACE_${versionfull_alias}_${dict_key} "${values}")
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endif()
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endif()
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endfunction()
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# Walks a target's public link libraries recursively, and performs some actions (poor man's
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# polypmorphism)
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#
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# Walks INTERFACE_LINK_LIBRARIES for all target types, as well as LINK_LIBRARIES for static
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# library targets.
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#
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# out_var: the name of the variable where the result will be assigned. The result is a list of
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# libraries, mostly in generator expression form.
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# rcc_objects_out_var: the name of the variable where the collected rcc object files will be
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# assigned (for the initial target and its dependencies)
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# dict_name: used for caching the results, and preventing the same target from being processed
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# twice
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# operation: a string to tell the function what additional behaviors to execute.
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# 'collect_libs' (default) operation is to collect linker file paths and flags.
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# Used for prl file generation.
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# 'promote_global' promotes walked imported targets to global scope.
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# 'collect_targets' collects all target names (discards framework or link flags)
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# 'direct_targets' collects only the direct target names (discards framework or link
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# flags)
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#
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#
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function(__qt_internal_walk_libs
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target out_var rcc_objects_out_var dict_name operation)
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set(collected ${ARGN})
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if(target IN_LIST collected)
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return()
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endif()
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list(APPEND collected ${target})
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if(operation MATCHES "^direct")
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set(direct TRUE)
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else()
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set(direct FALSE)
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endif()
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if(target STREQUAL "${QT_CMAKE_EXPORT_NAMESPACE}::EntryPointPrivate")
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# We can't (and don't need to) process EntryPointPrivate because it brings in
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# $<TARGET_PROPERTY:prop> genexes which get replaced with
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# $<TARGET_PROPERTY:EntryPointPrivate,prop> genexes in the code below and that causes
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# 'INTERFACE_LIBRARY targets may only have whitelisted properties.' errors with CMake
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# versions equal to or lower than 3.18. These errors are super unintuitive to debug
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# because there's no mention that it's happening during a file(GENERATE) call.
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return()
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endif()
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if(NOT TARGET ${dict_name})
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add_library(${dict_name} INTERFACE IMPORTED GLOBAL)
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endif()
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__qt_internal_get_dict_key_values(libs "${target}" "${dict_name}" "libs")
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__qt_internal_get_dict_key_values(rcc_objects "${target}" "${dict_name}" "rcc_objects")
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if(libs MATCHES "-NOTFOUND$")
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unset(libs)
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unset(rcc_objects)
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get_target_property(target_libs ${target} INTERFACE_LINK_LIBRARIES)
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if(NOT target_libs)
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unset(target_libs)
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endif()
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get_target_property(target_type ${target} TYPE)
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if(target_type STREQUAL "STATIC_LIBRARY")
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get_target_property(link_libs ${target} LINK_LIBRARIES)
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if(link_libs)
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list(APPEND target_libs ${link_libs})
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endif()
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endif()
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# Need to record the rcc object file info not only for dependencies, but also for
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# the current target too. Otherwise the saved information is incomplete for prl static
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# build purposes.
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get_target_property(main_target_rcc_objects ${target} _qt_rcc_objects)
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if(main_target_rcc_objects)
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__qt_internal_merge_libs(rcc_objects ${main_target_rcc_objects})
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endif()
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foreach(lib ${target_libs})
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# Cannot use $<TARGET_POLICY:...> in add_custom_command.
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# Check the policy now, and replace the generator expression with the value.
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while(lib MATCHES "\\$<TARGET_POLICY:([^>]+)>")
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cmake_policy(GET ${CMAKE_MATCH_1} value)
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if(value STREQUAL "NEW")
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set(value "TRUE")
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else()
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set(value "FALSE")
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endif()
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string(REPLACE "${CMAKE_MATCH_0}" "${value}" lib "${lib}")
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endwhile()
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# Fix up $<TARGET_PROPERTY:FOO> expressions that refer to the "current" target.
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# Those cannot be used with add_custom_command.
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while(lib MATCHES "\\$<TARGET_PROPERTY:([^,>]+)>")
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string(REPLACE "${CMAKE_MATCH_0}" "$<TARGET_PROPERTY:${target},${CMAKE_MATCH_1}>"
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lib "${lib}")
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endwhile()
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# Skip static plugins.
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set(_is_plugin_marker_genex "\\$<BOOL:QT_IS_PLUGIN_GENEX>")
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if(lib MATCHES "${_is_plugin_marker_genex}")
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continue()
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endif()
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# Skip optional dependencies for now. They are likely to be handled manually for prl
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# file purposes (like nolink handling). And for one of the other operations, we don't
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# have a use case yet. This might be revisited.
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if(lib MATCHES "^\\$<TARGET_NAME_IF_EXISTS:")
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continue()
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endif()
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# Strip any directory scope tokens.
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__qt_internal_strip_target_directory_scope_token("${lib}" lib)
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if(lib MATCHES "^\\$<TARGET_OBJECTS:")
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# Skip object files.
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continue()
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elseif(lib MATCHES "^\\$<LINK_ONLY:(.*)>$")
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set(lib_target ${CMAKE_MATCH_1})
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else()
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set(lib_target ${lib})
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endif()
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# Skip CMAKE_DIRECTORY_ID_SEP. If a target_link_libraries is applied to a target
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# that was defined in a different scope, CMake appends and prepends a special directory
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# id separator. Filter those out.
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if(lib_target MATCHES "^::@")
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continue()
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elseif(TARGET ${lib_target})
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if ("${lib_target}" MATCHES "^Qt::(.*)")
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# If both, Qt::Foo and Foo targets exist, prefer the target name without
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# namespace. Which one is preferred doesn't really matter. This code exists to
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# avoid ending up with both, Qt::Foo and Foo in our dependencies.
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set(namespaceless_lib_target "${CMAKE_MATCH_1}")
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if(TARGET namespaceless_lib_target)
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set(lib_target ${namespaceless_lib_target})
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endif()
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endif()
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get_target_property(lib_target_type ${lib_target} TYPE)
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if(lib_target_type STREQUAL "INTERFACE_LIBRARY")
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if(NOT ${direct})
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__qt_internal_walk_libs(
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${lib_target}
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lib_libs_${target}
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lib_rcc_objects_${target}
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"${dict_name}" "${operation}" ${collected})
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if(lib_libs_${target})
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__qt_internal_merge_libs(libs ${lib_libs_${target}})
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set(is_module 0)
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endif()
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if(lib_rcc_objects_${target})
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__qt_internal_merge_libs(rcc_objects ${lib_rcc_objects_${target}})
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endif()
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else()
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__qt_internal_merge_libs(libs ${lib})
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endif()
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elseif(NOT lib_target_type STREQUAL "OBJECT_LIBRARY")
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if(operation MATCHES "^(collect|direct)_targets$")
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__qt_internal_merge_libs(libs ${lib_target})
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else()
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__qt_internal_merge_libs(libs "$<TARGET_LINKER_FILE:${lib_target}>")
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endif()
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get_target_property(target_rcc_objects "${lib_target}" _qt_rcc_objects)
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if(target_rcc_objects)
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__qt_internal_merge_libs(rcc_objects ${target_rcc_objects})
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endif()
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if(NOT ${direct})
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__qt_internal_walk_libs(
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${lib_target}
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lib_libs_${target}
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lib_rcc_objects_${target}
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"${dict_name}" "${operation}" ${collected})
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endif()
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if(lib_libs_${target})
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__qt_internal_merge_libs(libs ${lib_libs_${target}})
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endif()
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if(lib_rcc_objects_${target})
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__qt_internal_merge_libs(rcc_objects ${lib_rcc_objects_${target}})
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endif()
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endif()
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if(operation STREQUAL "promote_global")
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set(lib_target_unaliased "${lib_target}")
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get_target_property(aliased_target ${lib_target} ALIASED_TARGET)
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if(aliased_target)
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set(lib_target_unaliased ${aliased_target})
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endif()
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get_property(is_imported TARGET ${lib_target_unaliased} PROPERTY IMPORTED)
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# Allow opting out of promotion. This is useful in certain corner cases
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# like with WrapLibClang and Threads in qttools.
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qt_internal_should_not_promote_package_target_to_global(
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"${lib_target_unaliased}" should_not_promote)
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if(is_imported AND NOT should_not_promote)
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__qt_internal_promote_target_to_global(${lib_target_unaliased})
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endif()
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endif()
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elseif("${lib_target}" MATCHES "^Qt::(.*)")
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message(FATAL_ERROR "The ${CMAKE_MATCH_1} target is mentioned as a dependency for \
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${target}, but not declared.")
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else()
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if(NOT operation MATCHES "^(collect|direct)_targets$")
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set(final_lib_name_to_merge "${lib_target}")
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if(lib_target MATCHES "/([^/]+).framework$")
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set(final_lib_name_to_merge "-framework ${CMAKE_MATCH_1}")
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endif()
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__qt_internal_merge_libs(libs "${final_lib_name_to_merge}")
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endif()
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endif()
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endforeach()
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__qt_internal_memoize_values_in_dict("${target}" "${dict_name}" "libs" "${libs}")
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__qt_internal_memoize_values_in_dict("${target}" "${dict_name}"
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"rcc_objects" "${rcc_objects}")
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endif()
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set(${out_var} ${libs} PARENT_SCOPE)
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set(${rcc_objects_out_var} ${rcc_objects} PARENT_SCOPE)
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endfunction()
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function(__qt_internal_print_missing_dependency_target_warning target dep)
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if(QT_SILENCE_MISSING_DEPENDENCY_TARGET_WARNING)
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return()
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endif()
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message(WARNING
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"When trying to collect dependencies of target '${target}', "
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"the non-existent target '${dep}' was encountered. "
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"This can likely be fixed by moving the find_package call that pulls in "
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"'${dep}' to the scope of directory '${CMAKE_CURRENT_LIST_DIR}' or higher. "
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"This warning can be silenced by setting QT_SILENCE_MISSING_DEPENDENCY_TARGET_WARNING to "
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"ON.")
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endfunction()
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# Given ${target}, collect all its private dependencies that are CMake targets.
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#
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# Discards non-CMake-target dependencies like linker flags or file paths.
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# Does nothing when given an interface library.
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#
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# To be used to extract the full list of target dependencies of a library or executable.
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function(__qt_internal_collect_all_target_dependencies target out_var)
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set(dep_targets "")
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get_target_property(target_type ${target} TYPE)
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if(NOT target_type STREQUAL "INTERFACE_LIBRARY")
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get_target_property(link_libs ${target} LINK_LIBRARIES)
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if(link_libs)
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foreach(lib ${link_libs})
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if(TARGET "${lib}")
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list(APPEND dep_targets "${lib}")
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__qt_internal_walk_libs(
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"${lib}"
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lib_walked_targets
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_discarded_out_var
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"qt_private_link_library_targets"
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"collect_targets")
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foreach(lib_target IN LISTS lib_walked_targets)
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if(NOT TARGET "${lib_target}")
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__qt_internal_print_missing_dependency_target_warning(${target}
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${lib_target})
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continue()
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endif()
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list(APPEND dep_targets ${lib_target})
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endforeach()
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endif()
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endforeach()
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endif()
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endif()
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list(REMOVE_DUPLICATES dep_targets)
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set(${out_var} "${dep_targets}" PARENT_SCOPE)
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endfunction()
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