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* CMake: Bump the minimum required CMake version to build Qt to 3.18Alexandru Croitor2020-11-031-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new function that returns the minimum CMake version required to build Qt. Pass that value to cmake_minimum_required() when building qtbase and its standalone tests. The minimum supported CMake version is read from qtbase/.cmake.conf and its value should be updated when the need arises. It's the main source of truth for all repos. Provide a way to lower the minimum CMake version at configure time by passing a value via QT_FORCE_MIN_CMAKE_VERSION. This is not an officially supported way of building Qt. If the specified version is lower than Qt's supported minimum, show a warning. Nevertheless the option is useful for testing how Qt builds with a different minimum CMake version due to different policies being enabled by default. Issue warnings for CMake versions that are higher than the minimum version but are known to cause issues when building Qt. A counterpart change is needed in qt5 to ensure the minimum CMake version is set at the proper time for top-level builds. Ideally we would use the same 'check the CMake minimum version` code in all our repositories, but that will cause lots of duplication because we can't really find_package() the code and doing something like include(../qtbase/foo.cmake) hardcodes assumptions about repo locations. So for now we don't bump the minimum version in child repo cmake_minimum_required calls (qtsvg, qtdeclarative, etc). Instead we record both the minimum supported version and the computed minimum version (in case a different version was forced) in QtBuildInternalsExtra.cmake. Then we require qtbase's computed min version in qt_build_repo_begin(). This won't set policies as cmake_minimum_required would, but at least it propagates what minimum CMake version should be used for child repos. We might still have to bump the versions in child repos at some point. Task-number: QTBUG-88086 Change-Id: Ida1c0d5d3e0fbb15d2aee9b68abab7a1648774b9 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Cristian Adam <cristian.adam@qt.io>
* cmake: Don't add module header for interface libs without headersTor Arne Vestbø2020-10-281-0/+5
| | | | | Change-Id: Ifba869586a65f28d5ff47bb2c01ce638110f493f Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
* CMake: Export QT_QPA_DEFAULT_PLATFORM in QtBuildInternalsExtraAlexandru Croitor2020-10-271-0/+8
| | | | | | | | | | | | The value is useful for QPA plugins built in repos other than qtbase, to decide if it should be a default plugin or not. Currently useful for qtwayland. Also export a qmake value assignment when doing static builds, just like src/gui/configure.pri does. Change-Id: I1253f1a7e178b24b16e2615ba20d1e92b0b87b1a Reviewed-by: Cristian Adam <cristian.adam@qt.io>
* CMake: Export 3rdparty dependency find_package calls of private modulesJoerg Bornemann2020-09-251-1/+12
| | | | | | | | | | | | | | | | Consider a Qt module with a 3rdparty library target in PRIVATE_MODULE_INTERFACE, e.g. XKB::XKB in Qt6::GuiPrivate. Consumers of GuiPrivate automatically depend on XKB::XKB. In order to do that they must find_package(XKB ...). As all find_package calls for GuiPrivate are in the same place as the ones for Gui, this package must be marked as optional. Otherwise all consumers of Qt6::Gui would have to have the xkbcommon package installed too. This patch exports find_package calls for every 3rdparty public dependency of private modules and marks them as optional. Change-Id: Ia1eeb09c29927fb6634ef08b477684ed6f123267 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
* Revert "Revert "CMake: Add facility to mark package dependencies as optional""Joerg Bornemann2020-09-141-1/+2
| | | | | | | | | This reverts commit b0c51f86f40b6b6d18fe2bb75cc851d36395240d. The build failure caused by 58c1c6ee5c986d502b56eb1cc57f1d9444d42031 has been fixed. Change-Id: Ic7458d54c7a874588e8b1bfeca61df1842763656 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
* Revert "CMake: Add facility to mark package dependencies as optional"Lars Knoll2020-09-131-2/+1
| | | | | | | | | | This reverts commit 3685483c4b79b4075bab6d341174a395359d1b4a. This lead to configuration errors on some machines, blocking development. Change-Id: I309cdd55a8ef64899afcbeca54458d1c6d686951 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
* CMake: Add facility to mark package dependencies as optionalJoerg Bornemann2020-09-121-1/+2
| | | | | | | | | | | | | | | | Every public dependency of a Qt module results in a find_package call in the consuming project. But not all public dependencies are mandatory. For example, vulkan is only needed if the user project actually uses Qt classes that pull in vulkan headers. This patch adds the option MARK_OPTIONAL to qt_find_package. Dependencies that are marked as optional will not produce an error on find failure. Task-number: QTBUG-86421 Change-Id: Ia767e7f36991e236582c7509cbd37ea3487bb695 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
* CMake: Provide way to register extra tool package dependenciesAlexandru Croitor2020-09-111-1/+11
| | | | | | | | | | | | | | | This is needed for qtwayland, where QtWaylandCompositor package should call find_package(QtWaylandScanner) in the 'Tools' section of the ModuleDependencies.cmake file, rather than the regular 'Qt' section. This takes care of handling host path prefixes, to ensure that a host package is found even when tools have also been cross-compiled via the QT_BUILD_TOOLS_WHEN_CROSSCOMPILING option. Task-number: QTBUG-83968 Change-Id: I4725a630214d053105fb6d2a0f7c5ff6128d13f9 Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io> Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
* CMake: Handle -D, -I, -F and -L configure argumentsJoerg Bornemann2020-08-171-0/+16
| | | | | | | | | | | | | | Introduce new CMake variables and map -D to QT_EXTRA_DEFINES, -I to QT_EXTRA_INCLUDEPATHS, -L to QT_EXTRA_LIBDIRS, and -F to QT_EXTRA_FRAMEWORKPATHS. Those variables only affect the Qt build, not user projects. Fixes: QTBUG-85878 Change-Id: I229df2eed1505a2619068d0d32975962b052569a Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
* CMake: Move QtPostProcess functions into QtPostProcessHelpers.cmakeAlexandru Croitor2020-08-141-0/+644
The helpers can now be included manually in a project to call any required function. There was a use case for that in qttools, which was not possible because including QtPostProcess early would produce side effects. Task-number: QTBUG-86035 Change-Id: I05d5576bbac45d4b9e298b23aa2a33088d64968e Reviewed-by: Cristian Adam <cristian.adam@qt.io>