Qt6 migration?

[mkyral]

Gentoo is currently removing Qt5 https://bugs.gentoo.org/948836

As result, tora can't be compiled any more. The qscintilla package is compiled against qt6 only and tora fails to find it. I've tested qt6 branch, fixed the FindQScintilla.cmake but build fails with:

FAILED: extlibs/trotl/src/CMakeFiles/trotl.dir/trotl_conn.cpp.o

x86_64-pc-linux-gnu-g++: warning: /Zc:__cplusplus: linker input file unused because linking not done
x86_64-pc-linux-gnu-g++: error: /Zc:__cplusplus: linker input file not found: No such file or directory

I'm not sure, if this is caused by Qt6 branch or it is Gentoo specific. I have to investigate more.

But would be nice know, if there is migration planned.