qmake overwrites .o if two cpp in different subdirs have the same filename

At the moment qmake overwrites .o if two cpp in different subdirs have the same filename. It would be handy if instead of creating the .o only from the .cpp file, the .o file was created based on the subdirectory and the .cpp name.

For example when having the following tree:

dir1/foo.cpp
dir2/foo.cpp
foo.cpp

then the generated .o would be :

dir1_foo.o
dir2_foo.o
foo.o

And they could sit next to each others in the same directory.