make will compile the source regularly. The library will be placed in lib/ and import files in include/
make test will compile the source with the -unittest flag. A binary will be placed in bin/test to execute the unit tests
It is best to make clean before building the tests if you have done a regular build before hand.
make docs will generate the ddocs for DOpenCL. The documentation is placed in the folder docs/
make clean will delete any files generated by make, make test, or make docs
make install will copy the lib file to /usr/lib/libDOpenCL.a and the import files to /usr/include/d/DOpenCL
make uninstall will delete the files created by make install