ewok ring buffer fails to link when no optimization level is specified

[curtismuntz]

Hello @vsu91,

I was trying to work on a more verbose debug build by changing the compiler options specified in the ewok_ring_buffer CMakeLists.txt from ... -g -O3 ... to ... -g -O0 ...

I'm getting the following error during linking when I don't specify an optimization level:

[ 94%] Linking CXX shared library /home/user/catkin_ws/devel/lib/librotors_gazebo_odometry_plugin.so
[ 96%] Built target rotors_gazebo_gps_plugin
CMakeFiles/ring_buffer_example.dir/src/ring_buffer_example.cpp.o: In function `ewok::RaycastRingBuffer<6, short, float, unsigned char>::RaycastRingBuffer(float const&)':
/home/user/catkin_ws/src/ewok/ewok_ring_buffer/include/ewok/raycast_ring_buffer.h:77: undefined reference to `ewok::RaycastRingBuffer<6, short, float, unsigned char>::updated_flag'
CMakeFiles/ring_buffer_example.dir/src/ring_buffer_example.cpp.o: In function `ewok::RingBufferBase<6, short, float>::insideVolume(Eigen::Matrix<int, 3, 1, 0, 3, 1> const&)':
/home/user/catkin_ws/src/ewok/ewok_ring_buffer/include/ewok/ring_buffer_base.h:144: undefined reference to `ewok::RingBufferBase<6, short, float>::_NEG_MASK'
/home/user/catkin_ws/src/ewok/ewok_ring_buffer/include/ewok/ring_buffer_base.h:144: undefined reference to `ewok::RingBufferBase<6, short, float>::_NEG_MASK'
/home/user/catkin_ws/src/ewok/ewok_ring_buffer/include/ewok/ring_buffer_base.h:144: undefined reference to `ewok::RingBufferBase<6, short, float>::_NEG_MASK'
collect2: error: ld returned 1 exit status
ewok/ewok_ring_buffer/CMakeFiles/ring_buffer_example.dir/build.make:156: recipe for target '/home/user/catkin_ws/devel/lib/ewok_ring_buffer/ring_buffer_example' failed
make[2]: *** [/home/user/catkin_ws/devel/lib/ewok_ring_buffer/ring_buffer_example] Error 1
CMakeFiles/Makefile2:3435: recipe for target 'ewok/ewok_ring_buffer/CMakeFiles/ring_buffer_example.dir/all' failed

I don't know why adding optimization flags removes this error. Do you have any ideas?

Thank you,

Curtis