Error occurs [Segmentation fault (core dumped)] when I run gicp_align about fast_gicp HOT 1 OPEN

1. I solve same problem.

First make sure find_package(pcl) found your own pcl instand of system pcl(you can add some message(${PCL_INCLUDE_DIRS})). Then if your own pcl is built default with "--march=native -msse ..." in pcl/build/PCLConfig.cmake, your should make sure it's the same in CMakeLists.txt within fast_gicp.
eg:
set(CMAKE_C_FLAGS "-march=native -msse4.2 -mfpmath=sse")
set(CMAKE_CXX_FLAGS "-march=native -msse4.2 -mfpmath=sse")

otherwise, eigen will have different size between pcl lib and your own gicp_align

2. ROS: put fast_gicp to catkin_ws/src with your ros package. Your own ros package should depend on this package like a "sensor_msgs" (find_package and catkin_package( CATKIN_DEPENDS ...)).

then you can simply link fast_gicp.so (target_link_libraries( ...))

from fast_gicp.