# Building VexCL programs with CMake¶

In order to build a VexCL program with the CMake build system you need just a couple of lines in your CmakeLists.txt:

cmake_minimum_required(VERSION 3.1)
project(example)

find_package(VexCL)



VexCL provides interface targets for the backends supported on the current system. Possible choices are VexCL::OpenCL for the OpenCL backend, VexCL::Compute for Boost.Compute, VexCL::CUDA for CUDA, and VexCL::JIT for the just-in-time compiled OpenMP kernels. The targets will take care of the appropriate compiler and linker flags for the selected backend.

If you are interested in generating all possible backends, you can use vexcl_add_executables(example example.cpp), which will generate up to four different versions of the same program, with _cl, _comp, _cuda, and _jit appended, depending on what backends were discovered. An interface target is available for you to add dependencies to all targets at once:

vexcl_add_executables(example example.cpp)


find_package(VexCL) may be used when VexCL was installed system wide. If that is not the case, you can just copy the VexCL into a subdirectory of your project (or use git submodules) and replace the line with
add_subdirectory(vexcl)