qt5base-lts/cmake/QtModuleDependencies.cmake.in
Alexey Edelev 425ff34aa1 Merge main and private targets of the internal modules
In cmake, targets are used as an entity for modules. This causes a
number of problems when we want to manipulate a module as a separate
entity with properties associated with it.
The _qt_internal_module_interface_name target property is introduced to
represent the module entity. All modules write a name to this property,
which will subsequently expand into the module name matched with
the module name in qmake.

The 'qt_internal_module_info' function is responsible for providing the
correct values ​​for the module properties used when working with a module
target.

Unlike qmake, for internal modules in cmake it is expected that the
Private suffix will be specified explicitly. In case the user wants to
have a different module name, an additional argument
MODULE_INTERFACE_NAME of the qt_internal_add_module function is
introduced.

This also changes the way how target dependencies are collected and
resolved. Since the 'Private' suffix no longer means an unique
identifier of the module 'Private' part, we look for the both Private
and non-Private package names when resolving dependencies.

TODO: This change doesn't affect the existing internal modules, so to
keep compatibility with the existing code the existing internal modules
create 'Private' aliases. The code that provides backward compatibility
must be removed once all internal modules will get the proper names.

Taks-number: QTBUG-87775
Change-Id: Ib4f28341506fb2e73eee960a709e24c42bbcd5ec
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-05-20 19:40:45 +02:00

113 lines
3.8 KiB
CMake

# Make sure @INSTALL_CMAKE_NAMESPACE@ is found before anything else.
set(@INSTALL_CMAKE_NAMESPACE@@target@_FOUND FALSE)
set(__qt_use_no_default_path_for_qt_packages "NO_DEFAULT_PATH")
if(QT_DISABLE_NO_DEFAULT_PATH_IN_QT_PACKAGES)
set(__qt_use_no_default_path_for_qt_packages "")
endif()
find_dependency(@INSTALL_CMAKE_NAMESPACE@ @PROJECT_VERSION@
PATHS
"${CMAKE_CURRENT_LIST_DIR}/.."
${_qt_additional_packages_prefix_path}
${_qt_additional_packages_prefix_path_env}
${QT_EXAMPLES_CMAKE_PREFIX_PATH}
${__qt_use_no_default_path_for_qt_packages}
)
# note: _third_party_deps example: "ICU\\;FALSE\\;1.0\\;i18n uc data;ZLIB\\;FALSE\\;\\;"
set(_third_party_deps "@third_party_deps@")
foreach(_target_dep ${_third_party_deps})
list(GET _target_dep 0 pkg)
list(GET _target_dep 1 is_optional)
list(GET _target_dep 2 version)
list(GET _target_dep 3 components)
set(find_package_args "${pkg}")
if(version)
list(APPEND find_package_args "${version}")
endif()
if(components)
string(REPLACE " " ";" components "${components}")
list(APPEND find_package_args COMPONENTS ${components})
endif()
if(is_optional)
if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
list(APPEND find_package_args QUIET)
endif()
find_package(${find_package_args})
else()
find_dependency(${find_package_args})
endif()
endforeach()
# Find Qt tool package.
set(_tool_deps "@main_module_tool_deps@")
if(NOT "${QT_HOST_PATH}" STREQUAL "")
# Make sure that the tools find the host tools first
set(BACKUP_@target@_CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH})
set(BACKUP_@target@_CMAKE_FIND_ROOT_PATH ${CMAKE_FIND_ROOT_PATH})
list(PREPEND CMAKE_PREFIX_PATH "${QT_HOST_PATH_CMAKE_DIR}")
list(PREPEND CMAKE_FIND_ROOT_PATH "${QT_HOST_PATH}")
endif()
foreach(_target_dep ${_tool_deps})
list(GET _target_dep 0 pkg)
list(GET _target_dep 1 version)
unset(find_package_args)
if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
list(APPEND find_package_args QUIET)
endif()
if(${CMAKE_FIND_PACKAGE_NAME}_FIND_REQUIRED)
list(APPEND find_package_args REQUIRED)
endif()
find_package(${pkg} ${version} ${find_package_args}
PATHS
${_qt_additional_packages_prefix_path}
${_qt_additional_packages_prefix_path_env}
)
if (NOT ${pkg}_FOUND)
if(NOT "${QT_HOST_PATH}" STREQUAL "")
set(CMAKE_PREFIX_PATH ${BACKUP_@target@_CMAKE_PREFIX_PATH})
set(CMAKE_FIND_ROOT_PATH ${BACKUP_@target@_CMAKE_FIND_ROOT_PATH})
endif()
return()
endif()
endforeach()
if(NOT "${QT_HOST_PATH}" STREQUAL "")
set(CMAKE_PREFIX_PATH ${BACKUP_@target@_CMAKE_PREFIX_PATH})
set(CMAKE_FIND_ROOT_PATH ${BACKUP_@target@_CMAKE_FIND_ROOT_PATH})
endif()
# TODO: The dependencies lookup mechanism is common for Modules and Plugins.
# It should be moved to the common public helper file.
#
# note: target_deps example: "Qt6Core\;5.12.0;Qt6Gui\;5.12.0"
set(_target_deps "@target_deps@")
foreach(_target_dep ${_target_deps})
list(GET _target_dep 0 pkg)
list(GET _target_dep 1 version)
if(NOT ${pkg}_FOUND)
set(pkg_names ${pkg})
if(pkg MATCHES "(.*)Private$")
set(pkg_names "${CMAKE_MATCH_1};${pkg}")
endif()
find_dependency(${pkg} ${version}
NAMES
${pkg_names}
PATHS
"${CMAKE_CURRENT_LIST_DIR}/.."
${_qt_additional_packages_prefix_path}
${_qt_additional_packages_prefix_path_env}
${QT_EXAMPLES_CMAKE_PREFIX_PATH}
${__qt_use_no_default_path_for_qt_packages}
)
endif()
endforeach()
set(_@QT_CMAKE_EXPORT_NAMESPACE@@target@_MODULE_DEPENDENCIES "@qt_module_dependencies@")
set(@INSTALL_CMAKE_NAMESPACE@@target@_FOUND TRUE)