How can qmake make a Pro project of type SUBDIRS generate debug and Release makefiles?

[VikiWang]

I created a Pro project of type SUBDIRS, and now every time I qmake the Pro, only one Makefile is generated, and the Makefile is always the release version. How can I get Qmake to generate debug and Release makefiles, just like Qmake does for pro projects of app type?

[VRonin]

Untested

Try adding CONFIG += debug_and_release