On Tue, May 17, 2016 at 9:39 AM, Didier Verna <did...@lrde.epita.fr> wrote: > Stelian Ionescu wrote: > >> #-feature >> (error "FEATURE missing") >> >> at toplevel, so you get an error on reading the .asd file. > > Of course. I said a "declarative way" within the system itself tho ;-) > I strongly recommend against erroring in the .asd file itself based on the implementation, because that hinders cross-compilation.
The traditional solution is to load a file that fails. i.e. create a file unsupported-implementation.lisp that has an (error ...) form and in your asd file, use a component (:file "unsupported-implementation" :if-feature (:not :sbcl)) And yes, I probably should have called it :when-feature instead of :if-feature. My bad. If you think that's worth it, we can add the new name now and remove the old name in 2 years. PS: Robert, I pushed a tiny tweak to the documentation. —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org If you're wrong against the dominant ideology, you'll be laughed at. If you're right against the dominant ideology, you'll be hated.
