This reverts commit 545400addd.
Reason for revert: Adding NO_CMAKE_PACKAGE_REGISTRY doesn't resolve the initial issue. So reverting this change as redundant.
Change-Id: I284600d6f0e0f2408a7a8b31827251dad4c73eba
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Allow forwarding the NO_CMAKE_PACKAGE_REGISTRY option to the
find_package call from qt_find_package.
When we look for host tool packages the package dependencies are
recorded in the cmake package registry. This leads to the situation
when the lookup retry will use the package that is already found in
host path instead of looking the right one in target paths.
Adding the 'NO_CMAKE_PACKAGE_REGISTRY' to the qt_find_package calls
suppresses records in cmake package registry and starts a clean search
using target paths.
Task-number: QTBUG-111140
Pick-to: 6.5
Change-Id: I97ce1755b2f8e3413f1b0276fe26568b2f5efe33
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Instead of constantly trying to find packages by calling
qt_find_package on each reconfiguration, record which packages were
found during initial configuration. Then on a second reconfiguration,
skip looking for packages that were not found on the initial
configuration.
This speeds up reconfiguration on certain platforms and repos.
Here are some stats for my macOS qtbase build.
not skip 3.69s user 4.96s system 98% cpu 8.750 total
skip 2.69s user 1.00s system 97% cpu 3.792 total
Top-level build with -submodules=qtquick3d
not skip 15.03s user 10.58s system 97% cpu 26.334 total
skip 13.87s user 5.16s system 96% cpu 19.724 total
Note this is a behavior change from how find_package is used in most
CMake projects, where if a package was previously missing, the
developer can just install the package and reconfigure to pick it up.
With this change, they will first have to remove their CMakeCache.txt
file and configure from scratch, or remove the
QT_INTERNAL_PREVIOUSLY_FOUND_PACKAGES cache variable and reconfigure.
For this reason, we enable this behavior by default only in
-developer-builds.
Builders can also opt in or out by setting the
QT_INTERNAL_SAVE_PREVIOUSLY_FOUND_PACKAGES variable to either ON or
OFF.
Note this behavior does not apply to user projects, or direct
find_package calls (as opposed to qt_find_package).
Fixes: QTBUG-107251
Change-Id: Iee9c5d120eb09e2a94eebb059a2174ef6b241e03
Reviewed-by: Kai Köhne <kai.koehne@qt.io>
Reviewed-by: Amir Masoud Abdol <amir.abdol@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
CMakeLists.txt and .cmake files of significant size
(more than 2 lines according to our check in tst_license.pl)
now have the copyright and license header.
Existing copyright statements remain intact
Task-number: QTBUG-88621
Change-Id: I3b98cdc55ead806ec81ce09af9271f9b95af97fa
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Add PlatformCommonInternal to the list of packages
compared in qt_internal_is_lib_part_of_qt6_package
It gets rid of the following warnings when configuring
standalone tests
CMake Warning at cmake/QtFindPackageHelpers.cmake:406 (message):
Could not find target Qt6::PlatformCommonInternal to query its
package name. Defaulting to package name Qt6PlatformCommonInternal.
Consider re-arranging the project structure to ensure the target
exists by this point.
CMake Warning at cmake/QtFindPackageHelpers.cmake:374 (message):
Could not determine package version of target
PlatformCommonInternal. Defaulting to project version 6.5.0.
Amends 606124c5cc
Amends dd1030a450
Amends dffcc2370e
Pick-to: 6.4
Task-number: QTBUG-104998
Change-Id: I65c23c20b3c1b70dbfd54edd4f5b83c6781f5e6f
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Previously if a target depended on CorePrivate, we would write a
_qt_internal_find_qt_dependencies(... Qt6CorePrivate) call into a
FooDependencies.cmake file.
That find_qt_deps call would remove the 'Private' suffix and would run
find_dependency with NAMES set to both the altered and non-altered
names.
This would find the relevant package but it would set the wrong
_FOUND variable name, e.g it would set Qt6CorePrivate_FOUND instead
of Qt6Core_FOUND.
This in turn could cause multiple lookups of the Qt6Core package
during dependency handling because the correct _FOUND var would not be
set.
Instead of always looking for the Qt6CorePrivate package, make sure
we look for an appropriately named package for all Privates modules,
because we have the necessary info to determine the correct name.
Note that INTERNAL modules will still be looked up via a Private
suffixed package name because that's how the package name is chosen
for them.
Remove the code that accounted for Private modules in
qt_internal_remove_qt_dependency_duplicates because it's not needed
anymore.
Warn when a package name can't be queried from a target's property
because the target might not exist yet.
Add a TODO comment for the code that searches with two NAMES.
We can't remove it right now, because it might break user projects
that use stale Dependencies.cmake files.
The dbus subdirectory is added before the tools subdirectory
to ensure that the new package name extraction does not error out, due
to trying to access a target that does not yet exist.
Amends 425ff34aa1
Pick-to: 6.4
Task-number: QTBUG-104998
Change-Id: Ib34ae5ed92f68b4265518c2b8802daeb1a3a04d6
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
When recording which package version to look for in
QtFooModuleDependencies.cmake and other files like it,
instead of using PROJECT_VERSION, use the version of the
package that contains the dependency.
For example if we're hypothetically building the qtdeclarative repo
from the 6.4 branch, against an installed 6.2 qtbase, then
the Qt6QmlModuleDependencies.cmake file will have a
find_package(Qt6Core 6.2) call because qtdeclarative's
find_package(Qt6Core) call found a 6.2 Core when it was configured.
This allows switching the versioning scheme of specific Qt modules
that might not want to follow the general Qt versioning scheme.
The first candidate would be QtWebEngine which might want to
follow the Chromium versioning scheme, something like
Qt 6.94.0 where 94 is the Chromium major version.
Implementation notes.
We now record the package version of a target in a property
called _qt_package_version. We do it for qt modules, plugins,
3rd party libraries, tools and the Platform target.
When we try to look up which version to write into the
QtFooModuleDependencies.cmake file (or the equivalent Plugins and
Tools file), we try to find the version
from a few sources: the property mentioned above, then the
Qt6{target}_VERSION variable, and finally PROJECT_VERSION.
In the latter case, we issue a warning because technically that should
never have to happen, and it's a bug or an unforeseen case if it does.
A few more places also need adjustments:
- package versions to look for when configuring standalone
tests and generating standalone tests Config files
- handling of tools packages
- The main Qt6 package lookup in each Dependencies.cmake files
Note that there are some requirements and consequences in case a
module wants to use a different versioning scheme like 6.94.0.
Requirements.
- The root CMakeLists.txt file needs to call find_package with a
version different from the usual PROJECT_VERSION. Ideally it
should look for a few different Qt versions which are known to be
compatible, for example the last stable and LTS versions, or just
the lowest supported Qt version, e.g. 6.2.6 or whenever this change
would land in the 6.2 branch.
- If the repository has multiple modules, some of which need to
follow the Qt versioning scheme and some not,
project(VERSION x.y.z) calls need to be carefully placed in
subdirectory scopes with appropriate version numbers, so that
qt_internal_add_module / _tool / _plugin pick up the correct
version.
Consequences.
- The .so / .dylib names will contain the new version, e.g. .so.6.94
- Linux ELF symbols will contain the new versions
- syncqt private headers will now exist under a
include/QtFoo/6.94.0/QtFoo/private folder
- pri and prl files will also contain the new version numbers
- pkg-config .pc files contain the new version numbers
- It won't be possible to write
find_package(Qt6 6.94 COMPONENTS WebEngineWidgets) in user code.
One would have to write find_package(Qt6WebEngineWidgets 6.94)
otherwise CMake will try to look for Qt6Config 6.94 which won't
exist.
- Similarly, a
find_package(Qt6 6.4 COMPONENTS Widgets WebEngineWidgets) call
would always find any kind of WebEngine package that is higher than
6.4, which might be 6.94, 6.95, etc.
- In the future, if we fix Qt6Config to pass EXACT to its
subcomponent find_package calls,
a find_package(Qt6 6.5.0 EXACT COMPONENTS Widgets WebEngineWidgets)
would fail to find WebEngineWidgets, because its 6.94.0 version
will not be equal to 6.5.0. Currently we don't pass through EXACT,
so it's not an issue.
Augments 5ffc744b79
Task-number: QTBUG-103500
Change-Id: I8bdb56bfcbc7f7f6484d1e56651ffc993fd30bab
Reviewed-by: Michal Klocek <michal.klocek@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
The previous implementation would pick up static Qt deps of a
shared Qt library as packages to find, but packages are not
created for these static libraries in a shared Qt build.
For example Qt::BundledSpirv_Cross is a static helper lib
that is linked directly into ShaderTools shared lib and no CMake
package is created for it, so we shouldn't look for it.
Separate the code path to filter out private dependencies
of a shared library target that don't have packages.
Amends 87215c70c0
Pick-to: 6.2
Fixes: QTBUG-97673
Task-number: QTBUG-86533
Change-Id: I43490b4d20c150256ccfa8b511a6e0e6b0f4b313
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Private Qt module dependencies of a Qt module are recorded
in the IMPORTED_LINK_DEPENDENT_LIBRARIES property of a Qt module.
This property is used to compute the runtime dependency dir path
to be passed to the linker via the -rpath-link option.
If the referenced target does not exist in the scope where it's
used, no -rpath-link will be generated (or at least that specific
dir path won't be passed).
The linking operation will either fail saying the library is not found,
or a different version of the library might be silently picked up in
the sysroot or other implicit lib dir.
Make sure that QtFooModuleDependencies.cmake calls find_package() for
all Qt module private dependencies (or other Qt provided 3rd party
libs in the Qt6:: namespace) so that the targets are in scope and
IMPORTED_LINK_DEPENDENT_LIBRARIES does its job.
qmake also records the INTERFACE_LINK_LIBRARIES of a private Qt module
as the runtime dependencies of the module.
It's not clear why it does that. A private Qt module is an
INTERFACE_LIBRARY so it shouldn't add any new runtime dependencies.
Nevertheless, the find_package part of that has been recently addressed
in 2b6500cd15 for a different reason.
This change is basically the CMake equivalent of
326b91ea78
Pick-to: 6.2
Fixes: QTBUG-86533
Change-Id: Iaf514a14acaded4e8752149cca0c159a271be188
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
When CMP00126 is set to NEW, set(CACHE) doesn't remove regular
variable bindings with the same name as the cache variable.
This introduced an issue in qt_find_package, which called
find_package(CONFIG QUIET) to try and find a package config file, but
did not clean up the non-cache _FOUND variable which is automatically
set to 0 by CMake if no Config file is found.
Make sure to unset both the regular and cache _FOUND variables if either
the package config file was not found, or if none of the provided
targets found even if the Config file was found.
Also move the _DIR cache variable cleaning into the same code block.
Amends 4c31ce68d5
Amends 34b1c1c23c
Fixes: QTBUG-95635
Pick-to: 6.2
Change-Id: I871987217526e0f0a20038a8da52625838e49488
Reviewed-by: Craig Scott <craig.scott@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
If Vulkan headers are present on the system when qtbase is configured,
QtGui and QtOpenGL should be compiled with Vulkan support.
If a user project uses a Qt built with Vulkan support, but their system
is missing Vulkan headers, the project configuration needs to succeed.
The project will get compilation errors if it uses Vulkan headers, but
that's intended.
This use case was broken when fixing Vulkan to be found when building
Qt for Android.
Fix the regression with a combination of things
1) Mark the WrapVulkanHeaders package as optional (already the case)
2) Use the include directories directly when compiling Gui and OpenGL
3) Propagate WrapVulkanHeaders::WrapVulkanHeaders link requirement to
consumers only if the target exists. It won't exist if Vulkan
include dirs are not found
This also requires some changes in pri and prl file generation.
For prl file generation, we don't want to link to the
WrapVulkanHeaders target, so we filter out all dependencies that
use TARGET_NAME_IF_EXISTS for anything that calls
__qt_internal_walk_libs which includes qt_collect_libs.
For pri files, we make sure to generate a uses=vulkan/nolink clause
by inspecting a new _qt_is_nolink_target property on the target.
We also don't add include dirs to the pri file if the new
_qt_skip_include_dir_for_pri property is set.
This is intended for Vulkan, because there is separate qmake logic to
try and find the include dirs when configuring a user project.
As a drive-by, fix nolink handling for WrapOpenSSLHeaders.
Amends bb25536a3d
Amends 7b9904849f
Pick-to: 6.2
Fixes: QTBUG-95391
Change-Id: I21e2f4be5c386f9e40033e4691f4786a91ba0e2d
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
The optional components arguments were not handled before which
caused the recorded package information for static builds to be
incorrect, it only recorded the package name without the component.
Remove REQUIRED_COMPONENTS TODO, there is no such find_package option,
it's already handled by the regular COMPONENTS code path.
Amends 07b6d3367d
Pick-to: 6.1 6.2
Fixes: QTBUG-94501
Change-Id: Ib48a7befcb70e20c3f21315897d51d3064b48134
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Dominik Holland <dominik.holland@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
User projects can set the QT_PROMOTE_TO_GLOBAL_TARGETS variable to
true so that the various imported targets created by find_package(Qt6)
are promoted to global targets.
This would allow a project to find Qt packages in a subdirectory scope
while using those Qt targets from a different scope.
E.g. it fixes errors like
CMake Error at CMakeLists.txt:5 (target_link_libraries):
Error evaluating generator expression:
$<TARGET_OBJECTS:Qt6::Widgets_resources_1>
Objects of target "Qt6::Widgets_resources_1" referenced but no such
target exists.
when trying to use a static Qt from a sibling scope.
Various 3rd party dependency targets (like Atomic or ZLIB) are not
made global due to limitations in CMake, but as long as those targets
are not mentioned directly, it shouldn't cause issues.
The targets are made global in the generated
QtFooAdditionalTargetInfo.cmake file.
To ensure that resource object libraries promoted, the generation
of the file has to be done at the end of the defining scope
where qt_internal_export_additional_targets_file is called,
which is achieved with a deferred finalizer.
Replaced all occurrences of target promotion with a helper function
which allows tracing of all promoted targets by specifying
--log-level=debug to CMake.
Pick-to: 6.2
Fixes: QTBUG-92878
Change-Id: Ic4ec03b0bc383d7e591a58c520c3974fbea746d2
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This makes qt_internal_disable_find_package_global_promotion available,
which is needed when linking against QtMultimedia in a static build
Pick-to: 6.2
Change-Id: I9b8f6d7b74a8693ac471f8a280e893f4da80a44b
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
In the future it might be useful to print the config summary entries
of a Qt module configure.cmake file even if the associated module
is not built and thus qt_feature_module_begin is not called.
The repo src/CMakeLists.txt could then use a combination of
qt_feature_evaluate_features and a conditional
qt_feature_record_summary_entries to ensure the that summary entries
are still shown.
Change-Id: I124efc82163ddae48d9e72c70a677ec4c6588fac
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
In cmake, targets are used as an entity for modules. This causes a
number of problems when we want to manipulate a module as a separate
entity with properties associated with it.
The _qt_internal_module_interface_name target property is introduced to
represent the module entity. All modules write a name to this property,
which will subsequently expand into the module name matched with
the module name in qmake.
The 'qt_internal_module_info' function is responsible for providing the
correct values for the module properties used when working with a module
target.
Unlike qmake, for internal modules in cmake it is expected that the
Private suffix will be specified explicitly. In case the user wants to
have a different module name, an additional argument
MODULE_INTERFACE_NAME of the qt_internal_add_module function is
introduced.
This also changes the way how target dependencies are collected and
resolved. Since the 'Private' suffix no longer means an unique
identifier of the module 'Private' part, we look for the both Private
and non-Private package names when resolving dependencies.
TODO: This change doesn't affect the existing internal modules, so to
keep compatibility with the existing code the existing internal modules
create 'Private' aliases. The code that provides backward compatibility
must be removed once all internal modules will get the proper names.
Taks-number: QTBUG-87775
Change-Id: Ib4f28341506fb2e73eee960a709e24c42bbcd5ec
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Needed for the upcoming static plugin mechanism, where we have to
extract the list of Qt module dependencies of a target and then extract
the plugins associated with those modules.
To do that we need to recursively collect the dependencies of a given
target.
Rename the moved functions to contain the __qt_internal prefix.
Also rename the existing QtPublicTargetsHelpers.cmake into
QtPlatformTargetHelpers.cmake to avoid confusion with the newly
introduced QtPublicTargetHelpers.cmake.
Task-number: QTBUG-92933
Change-Id: I48b5b6a8718a3424f59ca60f11fc9e97a809765d
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
The qt_internal_module_info function suppose to provide the information
only about the Qt modules. Avoid using it for the tool and extra
package dependencies, since some targets do not always exist, when
function is called.
Add the qt_internal_qtfy_target function to make the prefixed target
names.
Change-Id: Ifa8c61064d9c6c430889f00a4ead304029da711b
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Those entries were always empty. The INTERFACE_QT_MODULE_USES property
was never set.
Map each public dependency to its qmake lib name and place this value
into the module's QT.<module-name>.uses variable.
Take into account the "_nolink" target modifier and translate it to
qmake's "/nolink".
Pick-to: 6.0
Fixes: QTBUG-88951
Change-Id: Ib6ef65b842a1fe1da3ade55867583343b4ee76ee
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Rename QT_QMAKE_LIB_TARGETS_foo to QT_TARGETS_OF_QMAKE_LIB_foo, because
we want to introduce the counterpart QT_QMAKE_LIB_OF_TARGET_bar in a
subsequent commit.
Pick-to: 6.0
Task-number: QTBUG-88951
Change-Id: I33f00f4fe65c5977da6e74c632ebeab3b891c89a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
The CMake build of Qt intends to improve the developer experience in
regards to static Qt builds and Qt resource files. Specifically with a
CMake build of Qt, Qt developers don't have to manually call
Q_INIT_RESOURCE anymore.
For details see the following commits
e343affd63e817ac3d684ab5432081
The last commit's implementation is incomplete though.
To ensure successful linking, each target's prl file should contain
not only the resource object files that are assigned to the target,
but also all resource object files of the target's dependencies.
To achieve that, qt_collect_libs will now recursively collect all
resource object files assigned to the QT_RCC_OBJECTS property of each
dependency.
Note this implementation is still incomplete. We do not export rcc
object file information in the CMake Targets files.
That means that when configuring qtdeclarative in a
non-top-level build, the generated Qml prl file will not
contain references to Core's mimetypes resource object file, etc.
So with the current change, only the object files that are part of the
current CMake configuration build are tracked.
Exporting the resource object files locations proves in a format
usable for prl files proves to be difficult (due to CMake not
supporting exporting genexes in random properties) and will have to be
addressed in a separate change.
Amends 4ab5432081
Task-number: QTBUG-88425
Change-Id: I546655bdfdf7aa86a8df9aadfc054fa415130a33
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
The use-case is relevant for other platforms as well.
Now that Qt has a module system we can also replace a lot of the
hand crafted logic for linking with simpler constructs.
Change-Id: Ib6853aaf81bfea79c31f2de741d65b4b56f23ef6
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Introduce a bunch of helper functions to manipulate compiler
flags and linker flags for the
CMAKE_<LANG>_FLAGS_<CONFIG>
and
CMAKE_<LINK_TYPE>_LINKER_FLAGS_<CONFIG>
CMake variables.
These variables can be assigned and modified either in the cache
or for a specific subdirectory scope, which will apply the flags
only to targets in that scope.
Add qt_internal_add_optimize_full_flags() function which mimics
qmake's CONFIG += optimize_full behavior.
Calling it will force usage of the '-O3' optimization flag on supported
platforms (falling back '-O2' where not supported).
Use the function for the Core and Gui subdirectories, to enable full
optimization for the respective Qt modules as it is done in the qmake
projects.
To ensure that the global qmake-like compiler flags are assigned
eveywhere,
qt_internal_set_up_config_optimizations_like_in_qmake() needs
to be called after Qt global features like optimize_size and
optimize_full are available.
This means that qtbase and its standalone tests need some special
handling in regards to when to call that function.
Task-number: QTBUG-86866
Change-Id: Ic7ac23de0265561cb06a0ba55089b6c0d3347441
Reviewed-by: Joerg Bornemann <joerg.bornemann@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>
qt_record_extra_package_dependency is called by qtwayland to register a
dependency between the qtwaylandscanner tool and the waylandscanner
tool.
When cross-compiling the tools in a Yocto environment, the adjusted
target name was not taken into account.
Task-number: QTBUG-83968
Change-Id: Ibf7b94876bf29827cf0d9c9bb471f359ef6ff15f
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
QtBuild.cmake is huge. Split it.
Move module, plugin, tools, executables and test related functions out
of QtBuild.cmake into separate files.
Do the same for many other things too.
An additional requirement is that all the new Helpers files only
define functions and macros.
No global variable definitions are allowed, nor execution of commands
with side effects.
Some notes:
qt_install_qml_files is removed because it's dead code.
Some functions still need to be figured out, because they are
interspersed and depend on various global state assignments.
Task-number: QTBUG-86035
Change-Id: I21d79ff02eef923c202eb1000422888727cb0e2c
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
