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Cmake debug option


I may have just search really bad but I didn't find this information. I'm used to Makefile but how do I use the otion "-g" and "-Wall" in Cmake with catkin ? I try writing a really dumb program with a memory leak and to run it with valgrind but I have the following

==20197== 4 bytes in 1 blocks are definitely lost in loss record 1 of 1
==20197==    at 0x4C2B1C7: operator new(unsigned long) (in /usr/lib/valgrind/
==20197==    by 0x400845: main (in /home/ros/groovy_ws/catkin_ws/devel/lib/stalker/debug)

And so no line numbers...

Thanks a lot !