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| author | Alexandru Croitor <alexandru.croitor@qt.io> | 2020-08-03 16:28:16 +0200 |
|---|---|---|
| committer | Alexandru Croitor <alexandru.croitor@qt.io> | 2020-08-06 19:15:39 +0200 |
| commit | 92ee9bd6b885879090ba57e49c8bd84a06d42b2b (patch) | |
| tree | 0c0c691394595bb5fff42d31632e1c9ea9a21ba7 /src/corelib | |
| parent | bd2bcd4e1d38f18d2716cbebf7d106c090564217 (diff) | |
CMake: Properly handle CONFIG += thread aka Threads::Threads
mkspecs/features/qt.prf adds a dependency on the system threading
library if the Qt Core thread feature is enabled. Because qt.prf is
loaded by any public or internal Qt project, it's essentially a public
dependency for any Qt consumer.
To mimic that in CMake, we check if the thread feature is enabled, and
and set the Threads::Threads library as a dependency of Qt6::Platform,
which is a public target used by all Qt modules and plugins and Qt
consumers.
We also need to create a Qt6Dependencies.cmake file so we
find_package(Threads) every time find_package(Qt6) is called.
For the .prl files to be usable, we have to filter out some
CMake implementation specific directory separator tokens
'CMAKE_DIRECTORY_ID_SEP' aka '::@', which are added because we call
target_link_libraries() with a target created in a different scope
(I think).
As a result of this change, we shouldn't have to hardcode
Threads::Threads in other projects, because it's now a global public
dependency.
Task-number: QTBUG-85801
Task-number: QTBUG-85877
Change-Id: Ib5d662c43b28e63f7da49d3bd77d0ad751220b31
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Diffstat (limited to 'src/corelib')
| -rw-r--r-- | src/corelib/CMakeLists.txt | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt index 0702c32170..a4890f9bc9 100644 --- a/src/corelib/CMakeLists.txt +++ b/src/corelib/CMakeLists.txt @@ -249,7 +249,6 @@ qt_add_module(Core ../3rdparty/tinycbor/src LIBRARIES Qt::GlobalConfigPrivate # special case - Threads::Threads # special case PRECOMPILED_HEADER "global/qt_pch.h" NO_PCH_SOURCES @@ -276,6 +275,13 @@ endif() qt_generate_qconfig_cpp() +# Handle qtConfig(thread): CONFIG += thread like in qt.prf. +# Aka if the feature is enabled, publically link against the threading library. +# This also ensures the link flag is in the .prl file. +if(QT_FEATURE_thread) + target_link_libraries(Platform INTERFACE Threads::Threads) +endif() + # Handle QObject: Automoc does not work for this as it would # require to spill internals into users: qt_add_module(Core_qobject STATIC |