I am aware that there are many post about this, but I honestly didn't understood any of it. So, how do I install a kit for my Qt Creator open source 5. I just want to be able to develop in Qt and chose betwen MinGW 32 and MinGW 64. EDIT: I also checked the wiki page. Most of the commands didn't worked. And I was told that it is outdated. I know that your question is how do you install a kit for your Qt Creator, but first I think it's needed an introduction Sorry for your eyes, English it's not my native language Introduction The intention is to use the GCC compiler under Windows, what mean we need MinGW Minimalist GNU for Windows. MinGW only works for 32 bits, so we need the 64 bits forks, what means to use the MinGW-w64 or TDM-GCC flavors. About the binary compatibility chain When we make an application, we've to follow the chain of libraries compiled with the same compiler version, the same way we've to follow the application binary interface 32 or 64 bits for those libraries. This means, if we want to compile an application for 32 and 64 bits with MinGW-w64 5. Now come the weird thing. At Qt official webpage it's only available the 32bits builds for MinGW... I don't know why... Here is when come the Qt64-NG project, a place where get the Qt Framework 64bits binary packages for MinGW-w64. Unfortunately the project is closed, so only are available until the Qt 5. I don't know other place where to get newer 64bits Qt binary packages for MinGW-w64 Maybe the ones at MSYS2 project? I didn't tried yet. So, if one need it, at this moment must be compiled by oneself This is for answer your opensource 5. Install and configuration Now your question. How to install a kit for your Qt Creator. My advice is to download the 4. That's all, with this we can create 32 and 64 bits applications. After that it's needed to execute the qtbinpatcher. Note: If you change this directory to other path, execute again qtbinpatcher. Here is where end the installation process. In my case, I have all under the same folder. That's why we put in name x64. For 32 bits, just duplicate and change the selection. Note: For install Ninja just copy ninja. Ninja launch several make commands at same time, what decreases compilation times. Long text for 1 minute of configuration. The Kit is what we select for compile the project, and one can have as many Kits as one wish CompilerA x32 + Qt5. Now, before to finish, an important thing. After we create a project and the project it's open , at the Projects selector Ctrl+5 we've to take care of the Build Environment variables. In PATH it's needed to put the paths to MinGW-w64 and to Qt64-NG. And under my humble opinion, I recommend to put it in that order because of dll's. Those applications need to be launched from MSYS2 shell. It's not a binary compatibility thing but a paths matter. The libraries available at MSYS2 project can be used in the first tool chain I described due are build under MinGW-w64 also. EDIT: Corrected namings, the last explanation, and added Ninja's url and installation note. My issue was my vendors library isn't i686 tool chain compatible, so no linkage! If you want to use MSYS2, you should uninstall the Qt software that you downloaded separately to avoid confusion. For the rest of this answer, I'll assume you are using MSYS2. You can also use other build systems to build your software. I have used CMake successfully for building Qt applications in MSYS2, instead of Qt Creator.
