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If you are talking about compiler warnings, you can pass arguments to cmake or make via catkin_make:

 $ catkin_make --cmake-args -DCXX_FLAGS="-Wall"

Should enable all the warnings, for example.

If you are talking about compiler warnings, you can pass arguments to cmake or make via catkin_make:

 $ catkin_make --cmake-args -DCXX_FLAGS="-Wall"
-DCMAKE_CXX_FLAGS="-Wall"

Should enable all the warnings, for example.