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qt5base-lts/cmake/QtFindPackageHelpers.cmake
Alexey Edelev 5ae7527411 Do not use qt_internal_module_info for non-module targets 
The qt_internal_module_info function suppose to provide the information
only about the Qt modules. Avoid using it for the tool and extra
package dependencies, since some targets do not always exist, when
function is called.
Add the qt_internal_qtfy_target function to make the prefixed target
names.

Change-Id: Ifa8c61064d9c6c430889f00a4ead304029da711b
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-04-30 14:55:11 +02:00

302 lines
15 KiB
CMake
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# This function recursively walks transitive link libraries of the given target
# and promotes those targets to be IMPORTED_GLOBAL if they are not.
#
# This is required for .prl file generation in top-level builds, to make sure that imported 3rd
# party library targets in any repo are made global, so there are no scoping issues.
#
# Only works if called from qt_find_package(), because the promotion needs to happen in the same
# directory scope where the imported target is first created.
#
# Uses qt_internal_walk_libs.
function(qt_find_package_promote_targets_to_global_scope target)
qt_internal_walk_libs("${target}" _discarded_out_var _discarded_out_var_2
"qt_find_package_targets_dict" "promote_global")
endfunction()
macro(qt_find_package)
# Get the target names we expect to be provided by the package.
set(find_package_options CONFIG NO_MODULE MODULE REQUIRED)
set(options ${find_package_options} MARK_OPTIONAL)
set(oneValueArgs MODULE_NAME QMAKE_LIB)
set(multiValueArgs PROVIDED_TARGETS COMPONENTS)
cmake_parse_arguments(arg "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
# If some Qt internal project calls qt_find_package(WrapFreeType), but WrapFreeType was already
# found as part of a find_dependency() call from a ModuleDependencies.cmake file (or similar),
# and the provided target is also found, that means this might have been an unnecessary
# qt_find_package() call, because the dependency was already found via some other transitive
# dependency. Return early, so that CMake doesn't fail wiht an error with trying to promote the
# targets to be global. This behavior is not enabled by default, because there are cases
# when a regular find_package() (non qt_) can find a package (Freetype -> PNG), and a subsequent
# qt_find_package(PNG PROVIDED_TARGET PNG::PNG) still needs to succeed and register the provided
# targets. To enable the debugging behavior, set QT_DEBUG_QT_FIND_PACKAGE to 1.
set(_qt_find_package_skip_find_package FALSE)
if(QT_DEBUG_QT_FIND_PACKAGE AND ${ARGV0}_FOUND AND arg_PROVIDED_TARGETS)
set(_qt_find_package_skip_find_package TRUE)
foreach(qt_find_package_target_name ${arg_PROVIDED_TARGETS})
if(NOT TARGET ${qt_find_package_target_name})
set(_qt_find_package_skip_find_package FALSE)
endif()
endforeach()
if(_qt_find_package_skip_find_package)
message(AUTHOR_WARNING "qt_find_package(${ARGV0}) called even though the package "
"was already found. Consider removing the call.")
endif()
endif()
# Get the version if specified.
set(package_version "")
if(${ARGC} GREATER_EQUAL 2)
if(${ARGV1} MATCHES "^[0-9\.]+$")
set(package_version "${ARGV1}")
endif()
endif()
if(arg_COMPONENTS)
# Re-append components to forward them.
list(APPEND arg_UNPARSED_ARGUMENTS "COMPONENTS;${arg_COMPONENTS}")
endif()
# TODO: Handle REQUIRED_COMPONENTS.
# Don't look for packages in PATH if requested to.
if(QT_NO_USE_FIND_PACKAGE_SYSTEM_ENVIRONMENT_PATH)
set(_qt_find_package_use_system_env_backup "${CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH}")
set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH "OFF")
endif()
if(NOT (arg_CONFIG OR arg_NO_MODULE OR arg_MODULE) AND NOT _qt_find_package_skip_find_package)
# Try to find a config package first in quiet mode
set(config_package_arg ${arg_UNPARSED_ARGUMENTS})
list(APPEND config_package_arg "CONFIG;QUIET")
find_package(${config_package_arg})
# Double check that in config mode the targets become visible. Sometimes
# only the module mode creates the targets. For example with vcpkg, the sqlite
# package provides sqlite3-config.cmake, which offers multi-config targets but
# in their own way. CMake has FindSQLite3.cmake and with the original
# qt_find_package(SQLite3) call it is our intention to use the cmake package
# in module mode.
if (${ARGV0}_FOUND AND arg_PROVIDED_TARGETS)
unset(any_target_found)
foreach(expected_target ${arg_PROVIDED_TARGETS})
if (TARGET ${expected_target})
set(any_target_found TRUE)
break()
endif()
endforeach()
if(NOT any_target_found)
unset(${ARGV0}_FOUND)
endif()
endif()
endif()
# Ensure the options are back in the original unparsed arguments
foreach(opt IN LISTS find_package_options)
if(arg_${opt})
list(APPEND arg_UNPARSED_ARGUMENTS ${opt})
endif()
endforeach()
# TODO: Handle packages with components where a previous component is already found.
# E.g. find_package(Qt6 COMPONENTS BuildInternals) followed by
# qt_find_package(Qt6 COMPONENTS Core) doesn't end up calling find_package(Qt6Core).
if (NOT ${ARGV0}_FOUND AND NOT _qt_find_package_skip_find_package)
# Unset the NOTFOUND ${package}_DIR var that might have been set by the previous
# find_package call, to get rid of "not found" messagees in the feature summary
# if the package is found by the next find_package call.
if(DEFINED CACHE{${ARGV0}_DIR} AND NOT ${ARGV0}_DIR)
unset(${ARGV0}_DIR CACHE)
endif()
# Call original function without our custom arguments.
find_package(${arg_UNPARSED_ARGUMENTS})
endif()
if(QT_NO_USE_FIND_PACKAGE_SYSTEM_ENVIRONMENT_PATH)
if("${_qt_find_package_use_system_env_backup}" STREQUAL "")
unset(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH)
else()
set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH "${_qt_find_package_use_system_env_backup}")
endif()
endif()
if(${ARGV0}_FOUND AND arg_PROVIDED_TARGETS AND NOT _qt_find_package_skip_find_package)
# If package was found, associate each target with its package name. This will be used
# later when creating Config files for Qt libraries, to generate correct find_dependency()
# calls. Also make the provided targets global, so that the properties can be read in
# all scopes.
foreach(qt_find_package_target_name ${arg_PROVIDED_TARGETS})
if(TARGET ${qt_find_package_target_name})
# Allow usage of aliased targets by setting properties on the actual target
get_target_property(aliased_target ${qt_find_package_target_name} ALIASED_TARGET)
if(aliased_target)
set(qt_find_package_target_name ${aliased_target})
endif()
set_target_properties(${qt_find_package_target_name} PROPERTIES
INTERFACE_QT_PACKAGE_NAME ${ARGV0}
INTERFACE_QT_PACKAGE_IS_OPTIONAL ${arg_MARK_OPTIONAL})
if(package_version)
set_target_properties(${qt_find_package_target_name}
PROPERTIES INTERFACE_QT_PACKAGE_VERSION ${ARGV1})
endif()
if(arg_COMPONENTS)
string(REPLACE ";" " " components_as_string "${arg_COMPONENTS}")
set_property(TARGET ${qt_find_package_target_name}
PROPERTY INTERFACE_QT_PACKAGE_COMPONENTS ${components_as_string})
endif()
get_property(is_global TARGET ${qt_find_package_target_name} PROPERTY
IMPORTED_GLOBAL)
qt_internal_should_not_promote_package_target_to_global(
"${qt_find_package_target_name}" should_not_promote)
if(NOT is_global AND NOT should_not_promote)
set_property(TARGET ${qt_find_package_target_name} PROPERTY
IMPORTED_GLOBAL TRUE)
qt_find_package_promote_targets_to_global_scope(
"${qt_find_package_target_name}")
endif()
endif()
endforeach()
if(arg_MODULE_NAME AND arg_QMAKE_LIB
AND (NOT arg_QMAKE_LIB IN_LIST QT_QMAKE_LIBS_FOR_${arg_MODULE_NAME}))
set(QT_QMAKE_LIBS_FOR_${arg_MODULE_NAME}
${QT_QMAKE_LIBS_FOR_${arg_MODULE_NAME}};${arg_QMAKE_LIB} CACHE INTERNAL "")
set(QT_TARGETS_OF_QMAKE_LIB_${arg_QMAKE_LIB} ${arg_PROVIDED_TARGETS} CACHE INTERNAL "")
foreach(provided_target ${arg_PROVIDED_TARGETS})
set(QT_QMAKE_LIB_OF_TARGET_${provided_target} ${arg_QMAKE_LIB} CACHE INTERNAL "")
endforeach()
endif()
endif()
endmacro()
# Return qmake library name for the given target, e.g. return "vulkan" for "Vulkan::Vulkan".
function(qt_internal_map_target_to_qmake_lib target out_var)
set(${out_var} "${QT_QMAKE_LIB_OF_TARGET_${target}}" PARENT_SCOPE)
endfunction()
# This function records a dependency between ${main_target_name} and ${dep_package_name}.
# at the CMake package level.
# E.g. The Tools package that provides the qtwaylandscanner target
# needs to call find_package(WaylandScanner) (non-qt-package).
# main_target_name = qtwaylandscanner
# dep_package_name = WaylandScanner
function(qt_record_extra_package_dependency main_target_name dep_package_name dep_package_version)
if(NOT TARGET "${main_target_name}")
qt_get_tool_target_name(main_target_name "${main_target_name}")
endif()
if (TARGET "${main_target_name}")
get_target_property(extra_packages "${main_target_name}" QT_EXTRA_PACKAGE_DEPENDENCIES)
if(NOT extra_packages)
set(extra_packages "")
endif()
list(APPEND extra_packages "${dep_package_name}\;${dep_package_version}")
set_target_properties("${main_target_name}" PROPERTIES QT_EXTRA_PACKAGE_DEPENDENCIES
"${extra_packages}")
endif()
endfunction()
# This function records a dependency between ${main_target_name} and ${dep_target_name}
# at the CMake package level.
# E.g. Qt6CoreConfig.cmake needs to find_package(Qt6EntryPoint).
# main_target_name = Core
# dep_target_name = EntryPoint
# This is just a convenience function that deals with Qt targets and their associated packages
# instead of raw package names.
function(qt_record_extra_qt_package_dependency main_target_name dep_target_name
dep_package_version)
# EntryPoint -> Qt6EntryPoint.
qt_internal_qtfy_target(qtfied_target_name "${dep_target_name}")
qt_record_extra_package_dependency("${main_target_name}"
"${qtfied_target_name_versioned}" "${dep_package_version}")
endfunction()
# This function records a 'QtFooTools' package dependency for the ${main_target_name} target
# onto the ${dep_package_name} tools package.
# E.g. The QtWaylandCompositor package needs to call find_package(QtWaylandScannerTools).
# main_target_name = WaylandCompositor
# dep_package_name = Qt6WaylandScannerTools
function(qt_record_extra_main_tools_package_dependency
main_target_name dep_package_name dep_package_version)
if(NOT TARGET "${main_target_name}")
qt_get_tool_target_name(main_target_name "${main_target_name}")
endif()
if (TARGET "${main_target_name}")
get_target_property(extra_packages "${main_target_name}"
QT_EXTRA_TOOLS_PACKAGE_DEPENDENCIES)
if(NOT extra_packages)
set(extra_packages "")
endif()
list(APPEND extra_packages "${dep_package_name}\;${dep_package_version}")
set_target_properties("${main_target_name}" PROPERTIES QT_EXTRA_TOOLS_PACKAGE_DEPENDENCIES
"${extra_packages}")
endif()
endfunction()
# This function records a 'QtFooTools' package dependency for the ${main_target_name} target
# onto the ${dep_non_versioned_package_name} Tools package.
# main_target_name = WaylandCompositor
# dep_non_versioned_package_name = WaylandScannerTools
# This is just a convenience function to avoid hardcoding the qtified version in the dep package
# name.
function(qt_record_extra_qt_main_tools_package_dependency main_target_name
dep_non_versioned_package_name
dep_package_version)
# WaylandScannerTools -> Qt6WaylandScannerTools.
qt_internal_qtfy_target(qtfied_package_name "${dep_non_versioned_package_name}")
qt_record_extra_main_tools_package_dependency(
"${main_target_name}" "${qtfied_package_name_versioned}" "${dep_package_version}")
endfunction()
# This function stores the list of Qt modules a library depend on,
# along with their version info, for usage in ${target}Depends.cmake file
function(qt_register_target_dependencies target public_libs private_libs)
get_target_property(target_deps "${target}" _qt_target_deps)
if(NOT target_deps)
set(target_deps "")
endif()
# Only process private dependencies if target is a static library
get_target_property(target_type ${target} TYPE)
set(lib_list ${public_libs})
if (target_type STREQUAL "STATIC_LIBRARY")
list(APPEND lib_list ${private_libs})
endif()
foreach(lib IN LISTS lib_list)
if ("${lib}" MATCHES "^Qt::(.*)")
set(lib "${CMAKE_MATCH_1}")
if (lib STREQUAL Platform
OR lib STREQUAL GlobalConfig
OR lib STREQUAL GlobalConfigPrivate
OR lib STREQUAL PlatformModuleInternal
OR lib STREQUAL PlatformPluginInternal
OR lib STREQUAL PlatformToolInternal)
list(APPEND target_deps "Qt6\;${PROJECT_VERSION}")
elseif ("${lib}" MATCHES "(.*)Private")
list(APPEND target_deps "${INSTALL_CMAKE_NAMESPACE}${CMAKE_MATCH_1}\;${PROJECT_VERSION}")
else()
list(APPEND target_deps "${INSTALL_CMAKE_NAMESPACE}${lib}\;${PROJECT_VERSION}")
endif()
endif()
endforeach()
set_target_properties("${target}" PROPERTIES _qt_target_deps "${target_deps}")
endfunction()
# Sets out_var to to TRUE if the target was marked to not be promoted to global scope.
function(qt_internal_should_not_promote_package_target_to_global target out_var)
get_property(should_not_promote TARGET "${target}" PROPERTY _qt_no_promote_global)
set("${out_var}" "${should_not_promote}" PARENT_SCOPE)
endfunction()
function(qt_internal_disable_find_package_global_promotion target)
set_target_properties("${target}" PROPERTIES _qt_no_promote_global TRUE)
endfunction()
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