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 2.8)
project(example)
find_package(VexCL)
add_executable(example example.cpp)
target_link_libraries(example VexCL::OpenCL)
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.
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 and replace the line with
add_subdirectory(vexcl)