You can arrange to have d's runtime initialized when dlopen loads
the shared lib by adding a small shim that uses gcc attributes,
as follows:
// shim.c
__attribute__((constructor))
static void dinit() {
rt_init();
}
__attribute__((destructor))
static void dfini() {
rt_term();
}
// end of shim.c
Compile this to a .o with gcc, then include the .o in the build.
Note that I've only tried this trick with a simple "hello world"
shared lib, so I apologize in advance if it doesn't work for
real-world uses.
