CMake Port/Development Notes

2019

25. April 2019

- First merge in a while was done from qt5/dev into wip/cmake and as a result regenerated important CMakeLists.txt files.
- Fixed Windows build after qt5/dev -> wip/cmake merge and file regeneration
- Improved the exporting Tools CMake Targets patch
- Implemented 3rd party library dependency propagation when exporting module config files (packages like ZLIB or double-conversion)
- Implemented dependency propagation for a static build of Qt (targets like tinycbor, qtharfbuzz, simd targets, qtcore_qobject)
- A static build of qtbase now almost works
- Fixed more path handling issues in the pro2cmake convertor script,
- Fixed dependency relationships between Main and Private modules
- Implemented proper generation for _nolink libraries (think Vulkan and OpenSSL) 
- CMake build succeeded with Coin custom instructions (yaml files) patch, will make it easier to tweak CMake build instructions, not merged yet
- More work on the configure script, it can now build with both qmake or cmake, but no command line feature mapping yet

11. April 2019

- qtbase can now be built on Windows 10 in a private Coin instance,
- Research ongoing on building qtsvg against an installed qtbase, some issues already discovered
- Research into cross compiling to iOS by leveraging latest CMake 3.14 iOS support (which is still rudimentary)
- Investigated Conan, hunter and vcpkg in regards to providing 3rd party packages for iOS
- Ongoing work on providing packages and targets for module tools (CoreTools -> moc, rcc, WidgetTools -> uic, etc) which can then be used during cross building
- Fixed pro2cmake generation script to handle .pri includes and files better (fewer things that are not found),
- Added support to the generation script for qmake style no_link libraries (openssl, vulkan),
- Continuing work on merging qt5 dev branch to wip/cmake 
- Worked on infrastructure in Coin to allow building projects both with qmake and cmake (or anything else really), a prototype is available but still needs some work
- Continuing work on the configure script, and the mapping between configure features and cmake features
- Discussion ongoing on how to handle building and running tests in Coin

04. April 2019

- Work done on using a yocto generated sysroot to cross-build qtbase to an embedded device (some qtbase patches pending review, some patches still need to be upstreamed to the meta-b2qt repo)
- Regenerated many CMakeLists.txt files with the pro2cmake script
- WIP fixing the conversion script to handle .pri inclusion paths better
- WIP fixing the Windows provisioning to build the Qt CMake port on Windows
- Tested building of qtbase on macOS and Linux on a private instance of Coin (succeeds)
- WIP fixing the conversion script to deal with qmake's "SUBDIRS -=" functionality, which is not supported natively by CMake
- Progress on changing the qtbase configure script to use CMake to build Qt (rudimentary support, no feature mapping yet)
- Various small fixes to omissions in regenerated CMakeLists.txt files

21. March 2019

- Improved pro2cmake script to regenerate Core, Network, Gui, Widgets modules, to have smaller diffs in anticipation of a dev -> wip/cmake merge
- Fixed windows build (qpa plugin, various small conditions and other tiny things)
- Fixed automoc and autorcc not to hang due to incorrect target dependencies (upstream patch)
- Fixed certain incorrect target dependencies
- Improved pro2cmake script to parse which files need to be processed by rcc, instead of using rcc for that
- Worked on provisioning of latest CMake binaries on macOS and Linux
- Worked on getting private instances of Coin to build the CMake port on macOS and Linux
- Initial work on getting the configure script to invoke CMake instead of qmake for building qtbase