To speed up the `AUTOGEN` configuration process, evaluate the compiler
features only once. The feature evaluation result is stored in the new class
`cmQtAutoGen::CompilerFeatures`, and the instance is shared by using
`std::shared_ptr`.
The new `cmQtAutogenGlobalInitializer::Keywords` class instance is bound to
the lifetime of the `cmQtAutogenGlobalInitializer` instance. Global static
const strings would be allocated at program start and deallocated at program
end. Keeping keyword strings alive only in the context where they're
needed helps to reduce the memory footprint.
This adds the cmQtAutoGenGlobalInitializer::GetExecutableTestOutput method
which caches the output of the called executable and returns the cached value
on any subsequent call.
Suppress some cases in `Source/cmGeneratorExpressionNode.cxx` and
`Source/cmUVHandlePtr.h` where a few older compilers require a
user-defined default constructor (with `{}`).
We used to silently disable AUTOMOC/UIC/RCC when no valid Qt
version was found. This patch introduces the generation of
a warning message in that case.
Allow to force moc/rcc/uic compiler used for AUTO(MOC|RCC|UIC).
Setting these properties is only necessary if you are going to do
strange things like build these tools as part of your own build system.
Setting these properties will also prevent cmake from testing the
binary: It is user-provided and assumed to be valid.
Handle Qt version > 5 in Qt AutoGen.
This patch does *NOT* include tests and documentation: There is no
Qt 6 yet. I still need this patch to work on a cmake based build
system for Qt 6.
This teaches CMake the variables
- CMAKE_GLOBAL_AUTOGEN_TARGET
- CMAKE_GLOBAL_AUTOGEN_TARGET_NAME
- CMAKE_GLOBAL_AUTORCC_TARGET
- CMAKE_GLOBAL_AUTORCC_TARGET_NAME
which control the generation of global
``autogen`` and ``autorcc`` targets.
Closes#17721
