How to use gcov with QMake for code coverage

I would like to use gcov with my unit test written using QTestLib. I have managed to generate some .gcno files along my object files by adding this to my .pro file :

QMAKE_CXXFLAGS += -fprofile-arcs -ftest-coverage -O0

But, when I run :

gcov main.cpp.gcno

I got a bunch of .gcov files generated with non-useful content (nothing like what I see in the tutorials 开发者_C百科on the web) :

-:    0:Source:main.cpp
-:    0:Graph:main.gcno
-:    0:Data:-
-:    0:Runs:0
-:    0:Programs:0
-:    1:/*EOF*/
-:    2:/*EOF*/
-:    3:/*EOF*/
-:    4:/*EOF*/
-:    5:/*EOF*/
-:    6:/*EOF*/
-:    7:/*EOF*/
-:    8:/*EOF*/
-:    9:/*EOF*/
-:   10:/*EOF*/
-:   11:/*EOF*/
-:   12:/*EOF*/
-:   13:/*EOF*/
-:   14:/*EOF*/
#####:   15:/*EOF*/
-:   16:/*EOF*/
#####:   17:/*EOF*/
-:   18:/*EOF*/
-:   19:/*EOF*/
#####:   20:/*EOF*/
-:   21:/*EOF*/
-:   22:/*EOF*/
-:   23:/*EOF*/
-:   24:/*EOF*/
#####:   25:/*EOF*/
#####:   26:/*EOF*/
-:   27:/*EOF*/
-:   28:/*EOF*/
-:   29:/*EOF*/
#####:   30:/*EOF*/

My source files are under ./MyProject/test/src directory and all my object files are in a .obj directory underneath src (ie: .MyProject/test/src/.obj). All binaries are created in ./MyProject/build directory.

What am I missing?

Thanks!

---

Have you run your QT program? Until then there's no coverage data. Also, have a look at lcov, which you can use to get a nice html-based report of everything