And now it works again... :)
as @kenji said, Xcode 5.1 solved the problem. thx btw
here is my working environment and configuration for the one who are interested
- Xcode 5.1.1 (from the AppStore)
- gcovr 3.1-prerelease (installed with easy_install)
and in my project under 'Build Settings' I set the following:
- 'Generate Test Coverage Files' is set to YES
- 'Instrument Program Flow' is set to YES
after I run the tests, I execute the following command: (happens with jenkins)
gcovr -r . --object-directory Build/Intermediates/MyProj.build/Debug-iphonesimulator/KiwiUnitTest.build/Objects-normal/i386 --exclude '.*Tests.*' --exclude '.*KiwiUnitTest' --exclude '.*main.*' --xml > reports/coverage.xml
done.
sorry guys for making you wait for an answer and thank you everyone for your help.