Melodic and Noetic are all meeting this problem. Like the followings:

[piluohong]

In file included from /home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/type_traits.h:40,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/../utils/mypcl_cloud_type.h:21,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.h:24,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.cpp:19:
/home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/point_struct_traits.h:68:30: error: redefinition of ‘struct pcl::traits::decomposeArray’
68 | template struct decomposeArray
| ^~~~~~~~~~~~~~
In file included from /usr/local/include/pcl-1.10/pcl/make_shared.h:47,
from /usr/local/include/pcl-1.10/pcl/PCLHeader.h:6,
from /usr/local/include/pcl-1.10/pcl/point_cloud.h:47,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/../utils/mypcl_cloud_type.h:20,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.h:24,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.cpp:19:
/usr/local/include/pcl-1.10/pcl/point_traits.h:99:33: note: previous definition of ‘struct pcl::traits::decomposeArray’
99 | template struct decomposeArray
| ^~~~~~~~~~~~~~
In file included from /home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/type_traits.h:40,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/../utils/mypcl_cloud_type.h:21,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.h:24,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.cpp:19:
/home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/point_struct_traits.h:76:9: error: redefinition of ‘struct pcl::traits::POD’
76 | struct POD
| ^~~
In file included from /usr/local/include/pcl-1.10/pcl/make_shared.h:47,
from /usr/local/include/pcl-1.10/pcl/PCLHeader.h:6,
from /usr/local/include/pcl-1.10/pcl/point_cloud.h:47,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/../utils/mypcl_cloud_type.h:20,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.h:24,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.cpp:19:
/usr/local/include/pcl-1.10/pcl/point_traits.h:107:12: note: previous definition of ‘struct pcl::traits::POD’
107 | struct POD
| ^~~
In file included from /home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/type_traits.h:40,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/../utils/mypcl_cloud_type.h:21,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.h:24,
from /home/h/hong.MD.degree/cocolic_ws/src/Coco-LIC/src/spline/trajectory.cpp:19:
/home/h/ku/pcl-1.14-installpath/include/pcl-1.14/pcl/point_struct_traits.h:108:10: error: redefinition of default argument for ‘int dummy’
108 | struct name /** \cond NO_WARN_RECURSIVE / : name<typename POD::type, Tag, dummy> /* \endcond */
| ^~~~

[MGforest]

Hi @piluohong,

I have the same situation and error using ubuntu 20.04 and ros noetic.
ROS's PCL is 1.10. under /usr/include/pcl-1.10
I install PCL 1.14.0 by source code under /usr/local/include/pcl-1.14

The problem is ROS noetic and its packages need 1.10 and COCO-LIC higher than 1.10
However, in this repo README it says "tested with noetic"

Did anyone find a solution?

[Printeger]

@MGforest @piluohong You can move pcl-1.10 at /usr/include to somewhere for backup, and rm pcl-1.10.
The reason is pcl-1.10 in /usr/include and pcl-1.13.0 in /usr/local/include have conflict when compiled.

[piluohong]

@MGforest @piluohong You can move pcl-1.10 at /usr/include to somewhere for backup, and rm pcl-1.10. The reason is pcl-1.10 in /usr/include and pcl-1.13.0 in /usr/local/include have conflict when compiled.

Yes， thank you for your recommend.