Have a SomeLib.pro file that contains:
CONFIG += debug
TEMPLATE = lib
TARGET = SomeLib
..
Then in a dependent SomeApp.pro:
..
debug:LIBS += -lSomeLib_debug
..
How can I force SomeApp to build if I touched SomeLib in qmake?
It's ugly because you need to give the exact library file name, but this should work:
TARGETDEPS += libfoo.a