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qt5base-lts/cmake/QtPublicDependencyHelpers.cmake

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Add license headers to cmake files CMakeLists.txt and .cmake files of significant size (more than 2 lines according to our check in tst_license.pl) now have the copyright and license header. Existing copyright statements remain intact Task-number: QTBUG-88621 Change-Id: I3b98cdc55ead806ec81ce09af9271f9b95af97fa Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-05 11:26:52 +00:00
# Copyright (C) 2022 The Qt Company Ltd.
Change the license of all CMakeLists.txt and *.cmake files to BSD Task-number: QTBUG-105718 Change-Id: I5d3ef70a31235868b9be6cb479b7621bf2a8ba39 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-08-19 13:21:34 +00:00
# SPDX-License-Identifier: BSD-3-Clause
Add license headers to cmake files CMakeLists.txt and .cmake files of significant size (more than 2 lines according to our check in tst_license.pl) now have the copyright and license header. Existing copyright statements remain intact Task-number: QTBUG-88621 Change-Id: I3b98cdc55ead806ec81ce09af9271f9b95af97fa Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-05 11:26:52 +00:00
CMake: Extract package dependency finding into functions Aside from moving the code to reduce duplication, the only changes in the code are the replacement of @target@ to ${target}, using IN LISTS with variable names to avoid macro expansion issues and replacing the if(var) conditions with double variable evaluation + NOT STREQUAL "". The function implementations are now in the same order as they are used in the Dependencies.cmake files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Iaae926414fd2a7cc09c2f5716376caaa0aade74b Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 13:11:40 +00:00
# Note that target_dep_list does not accept a list of values, but a var name that contains the
# list of dependencies. See foreach block for reference.
macro(_qt_internal_find_third_party_dependencies target target_dep_list)
foreach(__qt_${target}_target_dep IN LISTS ${target_dep_list})
list(GET __qt_${target}_target_dep 0 __qt_${target}_pkg)
list(GET __qt_${target}_target_dep 1 __qt_${target}_is_optional)
list(GET __qt_${target}_target_dep 2 __qt_${target}_version)
list(GET __qt_${target}_target_dep 3 __qt_${target}_components)
list(GET __qt_${target}_target_dep 4 __qt_${target}_optional_components)
set(__qt_${target}_find_package_args "${__qt_${target}_pkg}")
if(__qt_${target}_version)
list(APPEND __qt_${target}_find_package_args "${__qt_${target}_version}")
endif()
if(__qt_${target}_components)
string(REPLACE " " ";" __qt_${target}_components "${__qt_${target}_components}")
list(APPEND __qt_${target}_find_package_args COMPONENTS ${__qt_${target}_components})
endif()
if(__qt_${target}_optional_components)
string(REPLACE " " ";"
__qt_${target}_optional_components "${__qt_${target}_optional_components}")
list(APPEND __qt_${target}_find_package_args
OPTIONAL_COMPONENTS ${__qt_${target}_optional_components})
endif()
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
_qt_internal_save_find_package_context_for_debugging(${target})
CMake: Extract package dependency finding into functions Aside from moving the code to reduce duplication, the only changes in the code are the replacement of @target@ to ${target}, using IN LISTS with variable names to avoid macro expansion issues and replacing the if(var) conditions with double variable evaluation + NOT STREQUAL "". The function implementations are now in the same order as they are used in the Dependencies.cmake files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Iaae926414fd2a7cc09c2f5716376caaa0aade74b Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 13:11:40 +00:00
if(__qt_${target}_is_optional)
if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
list(APPEND __qt_${target}_find_package_args QUIET)
endif()
find_package(${__qt_${target}_find_package_args})
else()
find_dependency(${__qt_${target}_find_package_args})
endif()
endforeach()
endmacro()
# Note that target_dep_list does not accept a list of values, but a var name that contains the
# list of dependencies. See foreach block for reference.
macro(_qt_internal_find_tool_dependencies target target_dep_list)
if(NOT "${${target_dep_list}}" STREQUAL "" AND 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}"
"${_qt_additional_host_packages_prefix_paths}")
list(PREPEND CMAKE_FIND_ROOT_PATH "${QT_HOST_PATH}"
"${_qt_additional_host_packages_root_paths}")
endif()
foreach(__qt_${target}_target_dep IN LISTS ${target_dep_list})
list(GET __qt_${target}_target_dep 0 __qt_${target}_pkg)
list(GET __qt_${target}_target_dep 1 __qt_${target}_version)
unset(__qt_${target}_find_package_args)
if(${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
list(APPEND __qt_${target}_find_package_args QUIET)
endif()
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
_qt_internal_save_find_package_context_for_debugging(${target})
CMake: Extract package dependency finding into functions Aside from moving the code to reduce duplication, the only changes in the code are the replacement of @target@ to ${target}, using IN LISTS with variable names to avoid macro expansion issues and replacing the if(var) conditions with double variable evaluation + NOT STREQUAL "". The function implementations are now in the same order as they are used in the Dependencies.cmake files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Iaae926414fd2a7cc09c2f5716376caaa0aade74b Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 13:11:40 +00:00
find_package(${__qt_${target}_pkg}
${__qt_${target}_version}
${__qt_${target}_find_package_args}
PATHS
CMake: Allow setting Qt6_DIR to find packages when not cross-compiling So far we always recommended that developers set CMAKE_PREFIX_PATH to point to the location of the Qt installation so that Qt packages are found by CMake. In Qt5 one could also set the Qt5_DIR variable to $qt/lib/cmake/Qt5 to allow the following signature to work: find_package(Qt5 COMPONENTS Core) This was not sufficient in Qt6 because the CoreTools dependency would not be found. Fix this by also looking into the parent folder of CMAKE_CURRENT_LIST_DIR as well as _qt_cmake_dir, like we already do for regular non-Tools packages in _qt_internal_find_dependencies. Note that setting Qt6_DIR is not sufficient for cross-compilation if the qt.toolchain.cmake file is not used. Aside from platform specific options that would have to be passed manually to CMake (like -DCMAKE_SYSTEM_NAME=iOS for iOS) and passing a QT_HOST_PATH value, the code would also need to be adapted to do the necessary CMAKE_FIND_ROOT_PATH manipulations to ensure that dependent packages are found. Pick-to: 6.4 Task-number: QTBUG-97615 Change-Id: I10c419632d43bb929e184bab3b9d3d27a35ea87a Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 17:09:32 +00:00
"${CMAKE_CURRENT_LIST_DIR}/.."
"${_qt_cmake_dir}"
CMake: Extract package dependency finding into functions Aside from moving the code to reduce duplication, the only changes in the code are the replacement of @target@ to ${target}, using IN LISTS with variable names to avoid macro expansion issues and replacing the if(var) conditions with double variable evaluation + NOT STREQUAL "". The function implementations are now in the same order as they are used in the Dependencies.cmake files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Iaae926414fd2a7cc09c2f5716376caaa0aade74b Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 13:11:40 +00:00
${_qt_additional_packages_prefix_paths}
)
CMake: Add switch for allowing missing Qt6*Tools packages Consider a cross build of Qt with qtbase, qtshadertools and qtdeclarative. If a user projects only links against QtQml without creating an actual QtQuick module, no host tools from qtdeclarative are needed. Normally, find_package(Qt6Qml) pulls in Qt6QmlTools and errors out if it's not found. By setting QT_ALLOW_MISSING_TOOLS_PACKAGES when configuring Qt, one can disable the error and build a user project such as the one outlined above. Pick-to: 6.4 6.5 Fixes: QTBUG-109547 Change-Id: I45e727713912d19e6007a7fbf3d61533f82b71d9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io> Reviewed-by: Jaeyoon Jung <jaeyoon.jung@lge.com>
2023-01-06 15:12:34 +00:00
if (NOT ${__qt_${target}_pkg}_FOUND AND NOT QT_ALLOW_MISSING_TOOLS_PACKAGES)
CMake: Display reason when a Qt*Tools package is not found When a package's tools dependency is not found (e.g. Core's CoreTools) set the _NOT_FOUND_MESSAGE variable the same way that find_dependency does. We can't use find_dependency directly because that returns immediately without allowing us to reset the prefix paths vars. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I81e9817de8f30214fafbefe3d98ef7bc8848e715 Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 17:05:34 +00:00
set(${CMAKE_FIND_PACKAGE_NAME}_FOUND FALSE)
set(${CMAKE_FIND_PACKAGE_NAME}_NOT_FOUND_MESSAGE
"${CMAKE_FIND_PACKAGE_NAME} could not be found because dependency \
${__qt_${target}_pkg} could not be found.")
CMake: Extract package dependency finding into functions Aside from moving the code to reduce duplication, the only changes in the code are the replacement of @target@ to ${target}, using IN LISTS with variable names to avoid macro expansion issues and replacing the if(var) conditions with double variable evaluation + NOT STREQUAL "". The function implementations are now in the same order as they are used in the Dependencies.cmake files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Iaae926414fd2a7cc09c2f5716376caaa0aade74b Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 13:11:40 +00:00
if(NOT "${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 "${${target_dep_list}}" STREQUAL "" AND 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()
endmacro()
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
# Please note the target_dep_list accepts not the actual list values but the list names that
# contain preformed dependencies. See foreach block for reference.
# The same applies for find_dependency_path_list.
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
macro(_qt_internal_find_qt_dependencies target target_dep_list find_dependency_path_list)
foreach(__qt_${target}_target_dep IN LISTS ${target_dep_list})
list(GET __qt_${target}_target_dep 0 __qt_${target}_pkg)
list(GET __qt_${target}_target_dep 1 __qt_${target}_version)
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
if (NOT ${__qt_${target}_pkg}_FOUND)
CMake: Record the precise package name where Private modules live Previously if a target depended on CorePrivate, we would write a _qt_internal_find_qt_dependencies(... Qt6CorePrivate) call into a FooDependencies.cmake file. That find_qt_deps call would remove the 'Private' suffix and would run find_dependency with NAMES set to both the altered and non-altered names. This would find the relevant package but it would set the wrong _FOUND variable name, e.g it would set Qt6CorePrivate_FOUND instead of Qt6Core_FOUND. This in turn could cause multiple lookups of the Qt6Core package during dependency handling because the correct _FOUND var would not be set. Instead of always looking for the Qt6CorePrivate package, make sure we look for an appropriately named package for all Privates modules, because we have the necessary info to determine the correct name. Note that INTERNAL modules will still be looked up via a Private suffixed package name because that's how the package name is chosen for them. Remove the code that accounted for Private modules in qt_internal_remove_qt_dependency_duplicates because it's not needed anymore. Warn when a package name can't be queried from a target's property because the target might not exist yet. Add a TODO comment for the code that searches with two NAMES. We can't remove it right now, because it might break user projects that use stale Dependencies.cmake files. The dbus subdirectory is added before the tools subdirectory to ensure that the new package name extraction does not error out, due to trying to access a target that does not yet exist. Amends 425ff34aa10a02524f2d52f544dc00b539ef9a26 Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Ib34ae5ed92f68b4265518c2b8802daeb1a3a04d6 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-19 16:12:18 +00:00
# TODO: Remove Private handling once sufficient time has passed, aka all developers
# updated their builds not to contain stale FooDependencies.cmake files without the
# _qt_package_name property.
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
set(__qt_${target}_pkg_names ${__qt_${target}_pkg})
if(__qt_${target}_pkg MATCHES "(.*)Private$")
set(__qt_${target}_pkg_names "${CMAKE_MATCH_1};${__qt_${target}_pkg}")
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
endif()
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
_qt_internal_save_find_package_context_for_debugging(${target})
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
find_dependency(${__qt_${target}_pkg} ${__qt_${target}_version}
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
NAMES
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
${__qt_${target}_pkg_names}
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
PATHS
${${find_dependency_path_list}}
CMake: Fix QT_ADDITIONAL_PACKAGES_PREFIX_PATH for cross-builds The QT_ADDITIONAL_PACKAGES_PREFIX_PATH variable was introduced to allow specifying extra locations to find Qt packages. The reason it was introduced instead of just using CMAKE_PREFIX_PATH is because the Qt6 component find_package call uses NO_DEFAULT_PATH which means CMAKE_PREFIX_PATH is ignored. We use NO_DEFAULT_PATH to ensure we don't accidentally pick up system / distro Qt packages. The paths from QT_ADDITIONAL_PACKAGES_PREFIX_PATH are added to the find_package PATHS option in the Qt6 package, each ModuleDependencies.cmake file and some other places. Unfortunately that's not enough to make it work for cross-builds. Imagine the following scenario. host qtbase, qtdeclarative installed in /host_qt target qtbase installed in /target_qtbase target qtdeclarative installed in /target_qtdeclarative We want to cross-build qtlottie. We configure qtlottie as follows /target_qtbase/bin/qt-configure-module /qtlottie_src -- -DQT_ADDITIONAL_PACKAGES_PREFIX_PATH=/target_qtdeclarative We expect the target QtQuick package to be found, but it won't be. The reason is that QT_ADDITIONAL_PACKAGES_PREFIX_PATH is added to the PATHs option, but we don't adjust CMAKE_FIND_ROOT_PATH. Without adding the new paths in CMAKE_FIND_ROOT_PATH, CMake will re-root the passed PATHs under the existing CMAKE_FIND_ROOT_PATH, which is QT_TOOLCHAIN_RELOCATABLE_INSTALL_PREFIX, which evaluates to /target_qtbase. There is no QtQuick package there. To fix this, prepend the values of QT_ADDITIONAL_PACKAGES_PREFIX_PATH to CMAKE_FIND_ROOT_PATH. The location where we currently do CMAKE_FIND_ROOT_PATH manipulations is in the qt.toolchain.cmake file, so to be consistent, we prepend the new prefixes there as well. We need to adjust both CMAKE_FIND_ROOT_PATH and CMAKE_PREFIX_PATH, due the path re-rooting bug in CMake. See https://gitlab.kitware.com/cmake/cmake/-/issues/21937 as well as the existing comment in qt.toolchain.cmake marked with REROOT_PATH_ISSUE_MARKER. We also need to do a few more things to make the setup work Because Qt6Config uses NO_DEFAULT_PATH, the CMAKE_PREFIX_PATH adjustments we do in the toolchain file are not enough, so we still need to add the same prefixes to the Qt6Config find_package PATHS option. One would ask why do we need to adjust CMAKE_PREFIX_PATH at all then. It's for find_package(Qt6Foo) calls to work which don't go through the Qt6Config umbrella package. To make the CMake re-rooting behavior happy, we need to ensure the provided paths are absolute. So we iterate over the values of QT_ADDITIONAL_PACKAGES_PREFIX_PATH, to make them absolute. We do the same for the environment variable. We need to append lib/cmake to the prefixes which are added to CMAKE_PREFIX_PATH, otherwise the CMake re-rooting bug is hit. We need to specify the Qt6 package location (${_qt_cmake_dir}) to the PATHS option in the various Dependencies.cmake.in files, to ensure that dependency resolution can jump around between the Qt6 dir and the additional prefixes. Previously the dependency lookup code assumed that all dependencies would be within the same prefix. The same is needed for qt and qml plugin dependency lookup. Amends 7bb91398f25cb2016c0558fd397b376f413e3e96 Amends 60c87c68016c6f02b0eddd4002f75a49ab51d4a8 Amends 5bbd700124d13a292ff8bae6045316112500e230 Pick-to: 6.2 Fixes: QTBUG-95854 Change-Id: I35ae82330fec427d0d38fc9a0542ffafff52556a Reviewed-by: Alexey Edelev <alexey.edelev@qt.io> Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
2021-08-17 15:03:02 +00:00
${_qt_additional_packages_prefix_paths}
Move dependency lookup functionality to the common macro Dependency lookup mechanism is the same for modules and plugins. It makes sense to wrap it using macro. Pick-to: 6.2 Change-Id: I73727743b0f5f40b2d94624f65ebfcf85e8dcc59 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-06-17 14:18:59 +00:00
${QT_EXAMPLES_CMAKE_PREFIX_PATH}
${__qt_use_no_default_path_for_qt_packages}
)
endif()
endforeach()
endmacro()
CMake: Rename _qt_internal_find_dependencies to something less generic Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I99b69865f711ff57511f32df2f345cebb7445d44 Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 17:22:37 +00:00
# TODO: Remove once a dependency update completes and most developers have the Dependencies.cmake
# files updated in their builds.
# The name is too generic, it doesn't look for any kind of dependencies but only Qt package
# dependencies.
macro(_qt_internal_find_dependencies target_dep_list find_dependency_path_list)
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
_qt_internal_find_qt_dependencies("none" "${target_dep_list}" "${find_dependency_path_list}")
endmacro()
# If a dependency package was not found, provide some hints in the error message on how to debug
# the issue.
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
#
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
# pkg_name_var should be the variable name that contains the package that was not found.
# e.g. __qt_Core_pkg
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
#
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
# message_out_var should contain the variable name of the original "not found" message, and it
# will have the hints appended to it as a string. e.g. ${CMAKE_FIND_PACKAGE_NAME}_NOT_FOUND_MESSAGE
#
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
# infix is used as a unique prefix to retrieve the find_package paths context for the last package
# that was not found, for debugging purposes.
#
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
# The function should not be called in Dependencies.cmake files directly, because find_dependency
# returns out of the included file.
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
macro(_qt_internal_suggest_dependency_debugging infix pkg_name_var message_out_var)
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
if(${pkg_name_var}
AND NOT ${CMAKE_FIND_PACKAGE_NAME}_FOUND
AND ${message_out_var})
if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.23")
string(APPEND ${message_out_var}
"\nConfiguring with --debug-find-pkg=${${pkg_name_var}} might reveal \
details why the package was not found.")
elseif(CMAKE_VERSION VERSION_GREATER_EQUAL "3.17")
string(APPEND ${message_out_var}
"\nConfiguring with -DCMAKE_FIND_DEBUG_MODE=TRUE might reveal \
details why the package was not found.")
endif()
CMake: Introduce QT_DEBUG_FIND_PACKAGE for troubleshooting When a Qt component or dependency is not found, we will now show a message that the user can reconfigure the project with -DQT_DEBUG_FIND_PACKAGE=ON. If the option is enabled, various variables that find_package uses to find packages (like CMAKE_PREFIX_PATH, CMAKE_FIND_ROOT_PATH) will be recorded before each find_package / find_dependency call that is executed in any of the Qt package files. If any find_package call fails (a package has its _FOUND variable set to 0), the values of all those recorded variables will be shown. This is useful to troubleshoot issues, especially when cross-compiling, without having to manually modify the various Config files. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I3654960597911bd704fbe3c419bcae347ab739a9 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 15:00:56 +00:00
if(NOT QT_DEBUG_FIND_PACKAGE)
string(APPEND ${message_out_var}
"\nConfiguring with -DQT_DEBUG_FIND_PACKAGE=ON will print the values of some of \
the path variables that find_package uses to try and find the package.")
else()
string(APPEND ${message_out_var}
"\n find_package search path values and other context for the last package that was not found:"
"\n CMAKE_MODULE_PATH: ${_qt_${infix}_CMAKE_MODULE_PATH}"
"\n CMAKE_PREFIX_PATH: ${_qt_${infix}_CMAKE_PREFIX_PATH}"
"\n \$ENV{CMAKE_PREFIX_PATH}: $ENV{CMAKE_PREFIX_PATH}"
"\n CMAKE_FIND_ROOT_PATH: ${_qt_${infix}_CMAKE_FIND_ROOT_PATH}"
"\n _qt_additional_packages_prefix_paths: ${_qt_${infix}_qt_additional_packages_prefix_paths}"
"\n _qt_additional_host_packages_prefix_paths: ${_qt_${infix}_qt_additional_host_packages_prefix_paths}"
"\n _qt_cmake_dir: ${_qt_${infix}_qt_cmake_dir}"
"\n QT_HOST_PATH: ${QT_HOST_PATH}"
"\n Qt6HostInfo_DIR: ${Qt6HostInfo_DIR}"
"\n Qt6_DIR: ${Qt6_DIR}"
"\n CMAKE_TOOLCHAIN_FILE: ${CMAKE_TOOLCHAIN_FILE}"
"\n CMAKE_FIND_ROOT_PATH_MODE_PACKAGE: ${CMAKE_FIND_ROOT_PATH_MODE_PACKAGE}"
"\n CMAKE_SYSROOT: ${CMAKE_SYSROOT}"
"\n \$ENV{PATH}: $ENV{PATH}"
)
endif()
endif()
endmacro()
# Save find_package search paths context just before a find_package call, to be shown with a
# package not found message.
macro(_qt_internal_save_find_package_context_for_debugging infix)
if(QT_DEBUG_FIND_PACKAGE)
set(_qt_${infix}_CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}")
set(_qt_${infix}_CMAKE_PREFIX_PATH "${CMAKE_PREFIX_PATH}")
set(_qt_${infix}_CMAKE_FIND_ROOT_PATH "${CMAKE_FIND_ROOT_PATH}")
set(_qt_${infix}_qt_additional_packages_prefix_paths
"${_qt_additional_packages_prefix_paths}")
set(_qt_${infix}_qt_additional_host_packages_prefix_paths
"${_qt_additional_host_packages_prefix_paths}")
set(_qt_${infix}_qt_cmake_dir "${_qt_cmake_dir}")
CMake: Suggest hints on how to debug missing packages Depending on CMake version suggest usage of either --debug-find-pkg or CMAKE_FIND_DEBUG_MODE to help troubleshoot why dependent packages are not found. To achieve that, append the hint message to the _NOT_FOUND_MESSAGE. To ensure it works for qt dependencies, and not only tool and 3rd party dependencies, _qt_internal_find_qt_dependencies is modified to set variable names infixed by the target name, so the name is consistent with the other dependency lookup functions. The check and message are also added when a Qt6 component is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I4ef23d1c53ac8e04eb72c260d6860c1eeec8d7a3 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-14 13:28:12 +00:00
endif()
CMake: Rename _qt_internal_find_dependencies to something less generic Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I99b69865f711ff57511f32df2f345cebb7445d44 Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
2022-07-13 17:22:37 +00:00
endmacro()
CMake: Move Qt6HostInfo lookup into a function Also replace the duplicate call in QtSetup using the new function. To do that, we have to actually the call it in QtBuild after QtPublicDependencyHelpers.cmake is available. That call is needed so that Qt6_HOST_INFO_foo variables are available in qt_generate_qmake_and_qtpaths_wrapper_for_target. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Ic5776c214bee6bedcea714b213b0e5a42c1bae06 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-15 16:14:20 +00:00
CMake: Improve Qt6HostInfo package lookup condition Instead of checking if QT_HOST_PATH is set during user project configuration to find out if Qt6HostInfo should be looked up, record if QT_HOST_PATH was provided during Qt configuration into Qt6Dependencies.cmake and look up the package in a user project based on that information. This improves handling of the case where cmake is directly used to configure a Qt project (instead of qt-cmake), which means no QT_HOST_PATH might be set by the user, and then cmake would error out saying that e.g. Qt6CoreTools is not found, instead of saying that Qt6HostInfo is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I0377d5440e4b5b295af73cfd4b5188f61d48e440 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-18 12:14:41 +00:00
function(_qt_internal_determine_if_host_info_package_needed out_var)
set(needed FALSE)
CMake: Move QT_HOST_PATH check and computation into Qt6 package Instead of trying to compute and validate the QT_HOST_PATH and QT_HOST_PATH_CMAKE_DIR variables in the generated toolchain file, do it in the Qt6 package. This provides better error messages when a project is configured without using the Qt generated toolchain file. Because it's not done in the toolchain anymore, remove the various host variables from __qt_toolchain_used_variables. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I1ca239ff83b8f783897e171fee352fc43e8ad7a8 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-18 14:09:30 +00:00
# If a QT_HOST_PATH is provided when configuring qtbase, we assume it's a cross build
# and thus we require the QT_HOST_PATH to be provided also when using the cross-built Qt.
# This tells the QtConfigDependencies file to do appropriate requirement checks.
if(NOT "${QT_HOST_PATH}" STREQUAL "" AND NOT QT_NO_REQUIRE_HOST_PATH_CHECK)
CMake: Improve Qt6HostInfo package lookup condition Instead of checking if QT_HOST_PATH is set during user project configuration to find out if Qt6HostInfo should be looked up, record if QT_HOST_PATH was provided during Qt configuration into Qt6Dependencies.cmake and look up the package in a user project based on that information. This improves handling of the case where cmake is directly used to configure a Qt project (instead of qt-cmake), which means no QT_HOST_PATH might be set by the user, and then cmake would error out saying that e.g. Qt6CoreTools is not found, instead of saying that Qt6HostInfo is not found. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I0377d5440e4b5b295af73cfd4b5188f61d48e440 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-18 12:14:41 +00:00
set(needed TRUE)
endif()
set(${out_var} "${needed}" PARENT_SCOPE)
endfunction()
macro(_qt_internal_find_host_info_package platform_requires_host_info)
if(${platform_requires_host_info})
CMake: Move Qt6HostInfo lookup into a function Also replace the duplicate call in QtSetup using the new function. To do that, we have to actually the call it in QtBuild after QtPublicDependencyHelpers.cmake is available. That call is needed so that Qt6_HOST_INFO_foo variables are available in qt_generate_qmake_and_qtpaths_wrapper_for_target. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: Ic5776c214bee6bedcea714b213b0e5a42c1bae06 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-15 16:14:20 +00:00
find_package(Qt6HostInfo
CONFIG
REQUIRED
PATHS "${QT_HOST_PATH}"
"${QT_HOST_PATH_CMAKE_DIR}"
NO_CMAKE_FIND_ROOT_PATH
NO_DEFAULT_PATH)
endif()
endmacro()
CMake: Move QT_HOST_PATH check and computation into Qt6 package Instead of trying to compute and validate the QT_HOST_PATH and QT_HOST_PATH_CMAKE_DIR variables in the generated toolchain file, do it in the Qt6 package. This provides better error messages when a project is configured without using the Qt generated toolchain file. Because it's not done in the toolchain anymore, remove the various host variables from __qt_toolchain_used_variables. Pick-to: 6.4 Task-number: QTBUG-104998 Change-Id: I1ca239ff83b8f783897e171fee352fc43e8ad7a8 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-18 14:09:30 +00:00
macro(_qt_internal_setup_qt_host_path
host_path_required
initial_qt_host_path
initial_qt_host_path_cmake_dir
)
# Set up QT_HOST_PATH and do sanity checks.
# A host path is required when cross-compiling but optional when doing a native build.
# Requiredness can be overridden via variable.
if(DEFINED QT_REQUIRE_HOST_PATH_CHECK)
set(_qt_platform_host_path_required "${QT_REQUIRE_HOST_PATH_CHECK}")
else()
set(_qt_platform_host_path_required "${host_path_required}")
endif()
if(_qt_platform_host_path_required)
# QT_HOST_PATH precedence:
# - cache variable / command line option
# - environment variable
# - initial QT_HOST_PATH when qtbase was configured (and the directory exists)
if(NOT DEFINED QT_HOST_PATH)
if(DEFINED ENV{QT_HOST_PATH})
set(QT_HOST_PATH "$ENV{QT_HOST_PATH}" CACHE PATH "")
elseif(NOT "${initial_qt_host_path}" STREQUAL "" AND EXISTS "${initial_qt_host_path}")
set(QT_HOST_PATH "${initial_qt_host_path}" CACHE PATH "")
endif()
endif()
if(NOT QT_HOST_PATH STREQUAL "")
get_filename_component(_qt_platform_host_path_absolute "${QT_HOST_PATH}" ABSOLUTE)
endif()
if("${QT_HOST_PATH}" STREQUAL "" OR NOT EXISTS "${_qt_platform_host_path_absolute}")
message(FATAL_ERROR
"To use a cross-compiled Qt, please set the QT_HOST_PATH cache variable to the "
"location of your host Qt installation.")
endif()
# QT_HOST_PATH_CMAKE_DIR is needed to work around the rerooting issue when looking for host
# tools. See REROOT_PATH_ISSUE_MARKER.
# Prefer initially configured path if none was explicitly set.
if(NOT DEFINED QT_HOST_PATH_CMAKE_DIR)
if(NOT "${initial_qt_host_path_cmake_dir}" STREQUAL ""
AND EXISTS "${initial_qt_host_path_cmake_dir}")
set(QT_HOST_PATH_CMAKE_DIR "${initial_qt_host_path_cmake_dir}" CACHE PATH "")
else()
# First try to auto-compute the location instead of requiring to set
# QT_HOST_PATH_CMAKE_DIR explicitly.
set(__qt_candidate_host_path_cmake_dir "${QT_HOST_PATH}/lib/cmake")
if(__qt_candidate_host_path_cmake_dir
AND EXISTS "${__qt_candidate_host_path_cmake_dir}")
set(QT_HOST_PATH_CMAKE_DIR
"${__qt_candidate_host_path_cmake_dir}" CACHE PATH "")
endif()
endif()
endif()
if(NOT QT_HOST_PATH_CMAKE_DIR STREQUAL "")
get_filename_component(_qt_platform_host_path_cmake_dir_absolute
"${QT_HOST_PATH_CMAKE_DIR}" ABSOLUTE)
endif()
if("${QT_HOST_PATH_CMAKE_DIR}" STREQUAL ""
OR NOT EXISTS "${_qt_platform_host_path_cmake_dir_absolute}")
message(FATAL_ERROR
"To use a cross-compiled Qt, please set the QT_HOST_PATH_CMAKE_DIR cache variable "
"to the location of your host Qt installation lib/cmake directory.")
endif()
endif()
endmacro()
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