When a CMake release introduces a new policy that affects most Qt
modules, it may be appropriate to make each module aware of that newer
CMake version and use the NEW policy without raising the minimum CMake
version requirement. To reduce the churn associated with making that
change across all Qt modules individually, this change allows it to be
updated in a central place (qtbase), but in a way that allows a Qt
module to override it in its own .cmake.conf file if required (e.g. to
address the issues identified by policy warnings at a later time). The
policies are modified at the start of the call to
qt_build_repo_begin().
For commands defined by the qtbase module, qtbase needs to be in
control of the policy settings at the point where those commands are
defined. The above mechanism should not affect the policy settings for
these commands, so the various *Config.cmake.in files must not specify
policy ranges in a way that a Qt module's .cmake.conf file could
influence.
Starting with CMake 3.12, policies can be specified as a version range
with the cmake_minimum_required() and cmake_policy() commands. All
policies introduced in CMake versions up to the upper limit of that
range will be set to NEW. The actual version of CMake being used only
has to be at least the lower limit of the specified version range.
This change uses cmake_minimum_required() rather than cmake_policy()
due to the latter not halting further processing upon failure.
See the following:
https://gitlab.kitware.com/cmake/cmake/-/issues/21557
Task-number: QTBUG-88700
Pick-to: 6.0
Change-Id: I0a1f2611dd629f847a18186394f500d7f52753bc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
In qt_internal_create_module_depends_file we're checking the target
property INTERFACE_MODULE_HAS_HEADERS. However, this property is not
exported, and in per-repo builds we do not have access to this.
As we cannot export INTERFACE_* properties, we export another one,
called _qt_module_has_headers.
This amends commit 598e873c84.
Fixes: QTBUG-88503
Change-Id: I04b3e24add6e95b577a049c80683b7361ff72f59
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Fix the overly strict regex in qt_internal_create_module_depends_file to
allow for - and _ in module names.
We had the above mentioned dependency cycle, because the module name
Core_qobject was translated to just Core, creating a Core -> Core
dependency.
Amends da7609e7d0.
Fixes: QTBUG-88437
Change-Id: I866f7ce31e9a1b92fe4c0a6450295c2f3c761558
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
We need to handle the possibility of versioned dep (Qt6::Foo).
Change-Id: I66797dbc59f00500892958e9c99c4555cddcb980
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
If not, the resulting dep would end up as 'Foo>', but we need 'Foo'.
Change-Id: I246b66eb0ac6b076eea200c4d1ad84bba8ed179c
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
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>
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>
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>
This reverts commit b0c51f86f4.
The build failure caused by 58c1c6ee5c has
been fixed.
Change-Id: Ic7458d54c7a874588e8b1bfeca61df1842763656
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This reverts commit 3685483c4b.
This lead to configuration errors on some machines, blocking
development.
Change-Id: I309cdd55a8ef64899afcbeca54458d1c6d686951
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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>
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>
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>
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>
