opencl

vcpkg install opencl

find_package(OpenCL REQUIRED)
target_link_libraries(main PRIVATE ${OpenCL_LIBRARIES})
target_include_directories(main PRIVATE ${OpenCL_INCLUDE_DIRS})

find_package(OpenCL REQUIRED)
target_link_libraries(main PRIVATE OpenCL::OpenCL)

WINDOWS: implementations typically ship with the drivers of you CPU/GPU vendors.
LINUX: implementations may be installed from your distro's repo or manually. There are too many to count.
APPLE: consult your distribution vendor on the state of OpenCL support: https://support.apple.com/en-us/HT202823