How to download and setup cxx-qt
Open terminal and run command
                                            git clone https://github.com/KDAB/cxx-qt.git
                                        
                                        git clone is used to create a copy or clone of cxx-qt repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with cxx-qt https://github.com/KDAB/cxx-qt/archive/master.zip
Or simply clone cxx-qt with SSH
                                            [email protected]:KDAB/cxx-qt.git                                    
                                    If you have some problems with cxx-qt
You may open issue on cxx-qt support forum (system) here: https://github.com/KDAB/cxx-qt/issuesSimilar to cxx-qt repositories
Here you may see cxx-qt alternatives and analogs
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