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CMake: Fix -no-prefix build with CMake < 3.26 on macOS

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On macOS, Core has plugins that link against CorePrivate. In a
non-prefix build, user projects failed on find_package(Qt6 REQUIRED
COMPONENTS Core), because CorePrivate is required for these plugins in
a non-prefix build, but it's not automatically pulled in.

This is only an issue for CMake < 3.26, because these older CMake
versions lack the BUILD_LOCAL_INTERFACE generator expression.

Fix this by pulling in the private modules for non-prefix builds when
using CMake < 3.26. Also, issue a warning in this situation.

Fixes: QTBUG-134407
Change-Id: I7f182c9518686390e657663b452cad8101d870a2
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Joerg Bornemann 2025-03-06 14:42:46 +01:00
parent ba103a6fee
commit 9df20860de
2 changed files with 17 additions and 6 deletions
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15
cmake/QtModuleHelpers.cmake
View File

@ -1034,12 +1034,15 @@ function(qt_internal_write_basic_module_package target target_private)
endif()
endif()
if(arg_IS_STATIC_LIB AND NOT arg_PRIVATE AND CMAKE_VERSION VERSION_LESS "3.26")
# We auto-load the private module package from the public module package if we have a static
# Qt module and CMake's version is < 3.26. This is needed for the case "Qt6Foo links against
# Qt6BarPrivate", because CMake generates a check for the target Qt6::BarPrivate in
# Qt6FooTargets.cmake. Once we can require CMake 3.26, we can simply link against
# $<BUILD_LOCAL_INTERFACE:Qt6BarPrivate> in qt_internal_extend_target.
if((QT_FEATURE_no_prefix OR arg_IS_STATIC_LIB)
AND NOT arg_PRIVATE
AND CMAKE_VERSION VERSION_LESS "3.26")
# We auto-load the private module package from the public module package if we have a
# statically built module or a non-prefix build and CMake's version is < 3.26. This is
# needed for the case "Qt6Foo links against Qt6BarPrivate", because CMake generates a check
# for the target Qt6::BarPrivate in Qt6FooTargets.cmake. Once we can require CMake 3.26, we
# can simply link against $<BUILD_LOCAL_INTERFACE:Qt6BarPrivate> in
# qt_internal_extend_target.
#
# For older CMake versions, we create an additional CMake file that's optionally included by
# Qt6FooConfig.cmake to work around the lack of BUILD_LOCAL_INTERFACE.

8
configure.cmake
View File

@ -1526,3 +1526,11 @@ qt_feature_definition("test_gui" "QT_GUI_TEST" VALUE "1")
qt_feature("test_gui" PUBLIC
LABEL "Build QtGuiTest namespace"
)
qt_configure_add_report_entry(
TYPE WARNING
MESSAGE "Starting with Qt 6.10, a -no-prefix or -developer-build
Qt build might not find all necessary Qt packages when using CMake < 3.26.
Please use a newer CMake version."
CONDITION QT_FEATURE_no_prefix AND CMAKE_VERSION VERSION_LESS "3.26"
)