This test checks that using only public header files, out-of-tree C++ code can use the rs274 interpreter. When changes are required in this test after a change in the interpreter, this is a breaking change; it should be avoided in stable releases if at all possible, and it should be documented whenever it occurs. This test is disabled because it requires internal LinuxCNC headers to be exposed. Refactoring the interpreter is necessary to allow for out-of-tree builds.