70 lines
3.3 KiB
CMake
70 lines
3.3 KiB
CMake
|
function(__qt_internal_get_supported_min_cmake_version_for_using_qt out_var)
|
||
|
|
# This is recorded in Qt6ConfigExtras.cmake
|
||
|
|
set(supported_version "${QT_SUPPORTED_MIN_CMAKE_VERSION_FOR_USING_QT}")
|
||
|
|
set(${out_var} "${supported_version}" PARENT_SCOPE)
|
||
|
|
endfunction()
|
||
|
|
|
||
|
|
function(__qt_internal_get_computed_min_cmake_version_for_using_qt out_var)
|
||
|
|
# Allow override when configuring user project.
|
||
|
|
if(QT_FORCE_MIN_CMAKE_VERSION_FOR_USING_QT)
|
||
|
|
set(computed_min_version "${QT_FORCE_MIN_CMAKE_VERSION_FOR_USING_QT}")
|
||
|
|
|
||
|
|
# Set in QtConfigExtras.cmake.
|
||
|
|
elseif(QT_COMPUTED_MIN_CMAKE_VERSION_FOR_USING_QT)
|
||
|
|
set(computed_min_version "${QT_COMPUTED_MIN_CMAKE_VERSION_FOR_USING_QT}")
|
||
|
|
else()
|
||
|
|
message(FATAL_ERROR
|
||
|
|
"Qt Developer error: Can't compute the minimum CMake version required to use this Qt.")
|
||
|
|
endif()
|
||
|
|
|
||
|
|
set(${out_var} "${computed_min_version}" PARENT_SCOPE)
|
||
|
|
endfunction()
|
||
|
|
|
||
|
|
function(__qt_internal_warn_if_min_cmake_version_not_met)
|
||
|
|
__qt_internal_get_supported_min_cmake_version_for_using_qt(min_supported_version)
|
||
|
|
__qt_internal_get_computed_min_cmake_version_for_using_qt(computed_min_version)
|
||
|
|
|
||
|
|
if(NOT min_supported_version STREQUAL computed_min_version
|
||
|
|
AND computed_min_version VERSION_LESS min_supported_version)
|
||
|
|
message(WARNING
|
||
|
|
"The minimum required CMake version to use Qt is: '${min_supported_version}'. "
|
||
|
|
"You have explicitly chosen to require a lower minimum CMake version: '${computed_min_version}'. "
|
||
|
|
"Using Qt with this CMake version is not officially supported. Use at your own risk."
|
||
|
|
)
|
||
|
|
endif()
|
||
|
|
endfunction()
|
||
|
|
|
||
|
|
function(__qt_internal_require_suitable_cmake_version_for_using_qt)
|
||
|
|
# Skip the public project check if we're building a Qt repo because it's too early to do
|
||
|
|
# it at find_package(Qt6) time.
|
||
|
|
# Instead, a separate check is done in qt_build_repo_begin.
|
||
|
|
# We detect a Qt repo by the presence of the QT_REPO_MODULE_VERSION variable set in .cmake.conf
|
||
|
|
# of each repo.
|
||
|
|
if(QT_REPO_MODULE_VERSION)
|
||
|
|
return()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Only do the setup once per directory scope, because Qt6 is a dependency for many packages,
|
||
|
|
# and a recursive call will show the warning multiple times.
|
||
|
|
if(__qt_internal_set_up_cmake_minimum_required_version_already_done)
|
||
|
|
return()
|
||
|
|
endif()
|
||
|
|
set(__qt_internal_set_up_cmake_minimum_required_version_already_done TRUE PARENT_SCOPE)
|
||
|
|
|
||
|
|
# Check the overall minimum required CMake version when consuming any Qt CMake package.
|
||
|
|
__qt_internal_warn_if_min_cmake_version_not_met()
|
||
|
|
__qt_internal_get_computed_min_cmake_version_for_using_qt(computed_min_version)
|
||
|
|
|
||
|
|
if(CMAKE_VERSION VERSION_LESS computed_min_version)
|
||
|
|
set(major_minor "${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}")
|
||
|
|
message(FATAL_ERROR
|
||
|
|
"CMake ${computed_min_version} or higher is required to use Qt. "
|
||
|
|
"You are running version ${CMAKE_VERSION} "
|
||
|
|
"Qt requires newer CMake features to work correctly. You can lower the minimum "
|
||
|
|
"required version by passing "
|
||
|
|
"-DQT_FORCE_MIN_CMAKE_VERSION_FOR_USING_QT=${major_minor} when configuring the "
|
||
|
|
"project. Using Qt with this CMake version is not officially supported. "
|
||
|
|
"Use at your own risk.")
|
||
|
|
endif()
|
||
|
|
endfunction()
|