[io] `OctreePointCloudCompression` only supports types pre-baked in `io/src/compression.cpp`

System: Ubuntu18.04LTS PCL1.9.1
I am compiling the source file in the tutorial pcl-pcl-1.9.1/doc/tutorials/content/sources/point_cloud_compression. By default it works well. The readthedocs said the compression supports any point types, but when I want to compress the point type pcl::PointXYZI, then it goes wrong when I am executing 'make'. The error message is as follows, How to compress pcl::PointXYZI?

CMakeFiles/point_cloud_compression.dir/point_cloud_compression.cpp.o: In function `SimpleOpenNIViewer::cloud_cb_(boost::shared_ptr<pcl::PointCloud<pcl::PointXYZI> const> const&)':
point_cloud_compression.cpp:(.text._ZN18SimpleOpenNIViewer9cloud_cb_ERKN5boost10shared_ptrIKN3pcl10PointCloudINS2_9PointXYZIEEEEE[_ZN18SimpleOpenNIViewer9cloud_cb_ERKN5boost10shared_ptrIKN3pcl10PointCloudINS2_9PointXYZIEEEEE]+0xb7): undefined reference to `pcl::io::OctreePointCloudCompression<pcl::PointXYZI, pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty, pcl::octree::Octree2BufBase<pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty> >::encodePointCloud(boost::shared_ptr<pcl::PointCloud<pcl::PointXYZI> const> const&, std::ostream&)'
point_cloud_compression.cpp:(.text._ZN18SimpleOpenNIViewer9cloud_cb_ERKN5boost10shared_ptrIKN3pcl10PointCloudINS2_9PointXYZIEEEEE[_ZN18SimpleOpenNIViewer9cloud_cb_ERKN5boost10shared_ptrIKN3pcl10PointCloudINS2_9PointXYZIEEEEE]+0xdb): undefined reference to `pcl::io::OctreePointCloudCompression<pcl::PointXYZI, pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty, pcl::octree::Octree2BufBase<pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty> >::decodePointCloud(std::istream&, boost::shared_ptr<pcl::PointCloud<pcl::PointXYZI> >&)'
CMakeFiles/point_cloud_compression.dir/point_cloud_compression.cpp.o:(.data.rel.ro._ZTVN3pcl2io27OctreePointCloudCompressionINS_9PointXYZIENS_6octree27OctreeContainerPointIndicesENS3_20OctreeContainerEmptyENS3_14Octree2BufBaseIS4_S5_EEEE[_ZTVN3pcl2io27OctreePointCloudCompressionINS_9PointXYZIENS_6octree27OctreeContainerPointIndicesENS3_20OctreeContainerEmptyENS3_14Octree2BufBaseIS4_S5_EEEE]+0x20): undefined reference to `pcl::io::OctreePointCloudCompression<pcl::PointXYZI, pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty, pcl::octree::Octree2BufBase<pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty> >::serializeTreeCallback(pcl::octree::OctreeContainerPointIndices&, pcl::octree::OctreeKey const&)'
CMakeFiles/point_cloud_compression.dir/point_cloud_compression.cpp.o:(.data.rel.ro._ZTVN3pcl2io27OctreePointCloudCompressionINS_9PointXYZIENS_6octree27OctreeContainerPointIndicesENS3_20OctreeContainerEmptyENS3_14Octree2BufBaseIS4_S5_EEEE[_ZTVN3pcl2io27OctreePointCloudCompressionINS_9PointXYZIENS_6octree27OctreeContainerPointIndicesENS3_20OctreeContainerEmptyENS3_14Octree2BufBaseIS4_S5_EEEE]+0x28): undefined reference to `pcl::io::OctreePointCloudCompression<pcl::PointXYZI, pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty, pcl::octree::Octree2BufBase<pcl::octree::OctreeContainerPointIndices, pcl::octree::OctreeContainerEmpty> >::deserializeTreeCallback(pcl::octree::OctreeContainerPointIndices&, pcl::octree::OctreeKey const&)'
collect2: error: ld returned 1 exit status
CMakeFiles/point_cloud_compression.dir/build.make:323: recipe for target 'point_cloud_compression' failed
make[2]: *** [point_cloud_compression] Error 1
CMakeFiles/Makefile2:94: recipe for target 'CMakeFiles/point_cloud_compression.dir/all' failed
make[1]: *** [CMakeFiles/point_cloud_compression.dir/all] Error 2
Makefile:102: recipe for target 'all' failed
make: *** [all] Error 2

Start with io/src/compression.cpp and the tutorial source at doc/tutorials/content/sources/point_cloud_compression. Check how OctreePointCloudCompression types are handled there, then build the tutorial using pcl::PointXYZI. Done means the example links and builds successfully with that point type, with coverage for the supported compression path.