Is it possible to set global variables in a qt pro file?

Question

Qt

There is a project, it has many subprojects, I would like to set all the paths in the main pro file so that the rest of the pro files of the subprojects pick up these paths.

Answer 1

If you need to get paths in cpp, then like this:
pro: DEFINES += MYVAR='"\\\"Hello world\\\""'
cpp: qDebug().noquote() << MYVAR;
And if only in pro files of other projects, then you can create a pri file with all variables, and include it via include(...pri) in each pro file.