Hi, I am trying to run a code which uses functions from both boost compute library and arrayfire library. I am getting the following errors when I try to build the code: Scanning dependencies of target hello [ 50%] Building CXX object CMakeFiles/hello.dir/hello.cpp.o In file included from /opt/arrayfire/include/CL/cl.h:32, from /usr/include/boost/compute/cl.hpp:19, from /usr/include/boost/compute/system.hpp:20, from /usr/include/boost/compute/algorithm/accumulate.hpp:17, from /usr/include/boost/compute/algorithm.hpp:18, from /usr/include/boost/compute.hpp:14, from /home/rcms/debruijn/arrayfire/hello.cpp:2: /opt/arrayfire/include/CL/cl_version.h:34:104: note: #pragma message: cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 220 (OpenCL 2.2) 34 | #pragma message("cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 220 (OpenCL 2.2)") | ^ [100%] Linking CXX executable hello /usr/bin/ld: CMakeFiles/hello.dir/hello.cpp.o: undefined reference to symbol 'clGetDeviceIDs@@OPENCL_1.0' /usr/bin/ld: /opt/arrayfire/lib64/libOpenCL.so.1: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/hello.dir/build.make:85: hello] Error 1 make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/hello.dir/all] Error 2 make: *** [Makefile:84: all] Error 2 The code I am using is a very simple helloworld using functions from both libraries. #include <iostream> #include <boost/compute.hpp> #include <arrayfire.h> namespace compute = boost::compute; using namespace af; int main() { // Boost Compute Part // get the default device compute::device device = compute::system::default_device(); // print the device's name and platform std::cout << "hello from " << device.name(); std::cout << " (platform: " << device.platform().name() << ")" << std::endl; // Array Fire Part std::cout<< "ArrayFire Part:" << std::endl; af::setDevice(0); af::info(); return 0; } The CMakeList used to build the project is: cmake_minimum_required(VERSION 3.0) project(deBruijn_Graph) find_package(ArrayFire) add_executable(hello hello.cpp) target_link_libraries(hello ArrayFire::afopencl) I do not have a programming background. Please guide me on what I am doing wrong. Regards, Hassan <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>