Added attr retain to dynctors. Dunno if this does anything, but it doesn"t complain and still works.

Fortune for rngxx's current commit: Middle blessing − 中吉

include/rngxx/internal/init.hpp

@@ -27,7 +27,7 @@ namespace rng::init
 }
 
 // To add to dynamic CTOR map
-#define RNGXX_APPLY_CTOR(ns, T, TSeed) __attribute__((used))\
+#define RNGXX_APPLY_CTOR(ns, T, TSeed) __attribute__((used, retain))\
 const static auto& RNGXX_DCTOR_NAME(T) = rng::init::apply<ns::T, TSeed>(#T, [](const TSeed* ptr) { return new ns::T(*ptr); })
 
 //const extern init::ctor_func& RNGXX_DCTOR_NAME(sm64);