I've been using ECL to compile SBCL on aarch64, but I can't do it without patching the sources. There is a warning triggered during the build (only on aarch64) with a format string that contains:
~<~%~9T~:;~/sb-impl:print-type/:~>
ECL chokes on this due to the ~T in the ~:; clause. Why is that not allowed? It seems like a reasonable thing to do at first glance.
-Eric