Problem when package PCL

[bladesaber]

Hello, everyone.
I want to make a PCL python wrapper, but after I build the .so and want to import it in python. It throws an error: dynamic module does not define module export function (PyInit_pcl_lib).

 CMakeLists.txt below:

cmake_minimum_required(VERSION 3.0.2)
project(pybind_test)
set(PACKAGE_TOP_DIR ${CMAKE_CURRENT_SOURCE_DIR})
find_package(PCL 1.8 REQUIRED)
add_subdirectory(cpp/pybind11)
include_directories(${PCL_INCLUDE_DIRS})
link_directories(${PCL_LIBRARY_DIRS})
add_definitions(${PCL_DEFINITIONS})
pybind11_add_module(pcl_lib cpp/src/pcl_lib.cpp)
target_link_libraries(pcl_lib PUBLIC pybind11::module ${PCL_LIBRARIES})

pcl_lib.cpp below

#include <pybind11/pybind11.h>
int add(int i, int j) { return i + j; }
PYBIND11_MODULE(pcl_lib, m){ m.doc() = "pcl plugin"; m.def("add", &add, "A function that adds two numbers"); }

Looking forward to your response, thank you. ^_^

[RPFey]

Hi, I had the same problem as you, using pcl-1.8; I solved this by building my packaged using pcl-1.10. Good Luck!

[liuwenhai]

find_package(PCL 1.8 REQUIRED) uses its dependent libpython.so, which may be different from the python version you use.
a direct method is replacing find_package(PCL 1.8 REQUIRED) with the following code,

include_directories(/where/your/pcl/install/include/pcl-1.8 )
file(GLOB PCL_LIBRARIES "/where/your/pcl/install/lib/libpcl*.so*")
find_package(Boost REQUIRED filesystem thread)
include_directories(${Boost_INCLUDE_DIRS})
find_package(Eigen3 REQUIRED)
include_directories(${EIGEN3_INCLUDE_DIR})
target_link_libraries(shot PRIVATE ${PCL_LIBRARIES} ${Boost_LIBRARIES})