Reflection C function call by ffcall

gistfile1.c

#include <stdio.h>
#include <dlfcn.h>
#include <avcall.h>

int main(int argc, char *argv[]) {
    int ret;
    av_alist alist;
    void *dlh;
    void *fp;
    
    dlh = dlopen(argv[0], RTLD_LAZY);
    fp = dlsym(dlh, "puts");
    
    av_start_int(alist, fp, &ret);
    av_ptr(alist, char *, "Hello World!");
    av_call(alist);
    
    return 0;
}