how to make sure a regular file has been created before compiling qt project

suppose myfile.cpp, mydata.dat are generated by another Makefile.
I need to make sure these two files are generated before compiling my qt project
I am wondering how to integrate it into pro file.

any suggestions? Thanks

Maybe through adding a custom compiler?

http://doc.qt.io/qt-5/qmake-advanced...ding-compilers

Cheers,
_