Qt 4.8.7 is not supported.
Qt 5.5.1 LTS is supported for PowerPC only.
Qt 5.15 LTS is supported until it is not.
Qt 6.5 LTS is supported.

For Android, MacOS, and Windows, Qt 6.5 LTS is required.

> qmake -o Makefile biblioteq.platform.pro
> gmake or make or mingw32-make
