How to name makefile in .pro file?

[wysota]

This would be sub-optimal; and what is the point of an automated make, if you have to run some (quite important) step manually?

What is the point of placing intermediate files (such as the Makefile) on a shared remote disk?

Is there a way to have a REAL out-of-source AND multi-platform build by using .pro settings and without using the Shadow build setting of Qt Creator

I don't really see a point of doing that in a single directory. But if you insist... Use the -o parameter of qmake and -f parameter of make.