Add a "fork" of musl as //fusl.

fusl/src/network/gethostbyname2.c

+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdlib.h>
+
+struct hostent *gethostbyname2(const char *name, int af)
+{
+        static struct hostent *h;
+        size_t size = 63;
+        struct hostent *res;
+        int err;
+        do {
+                free(h);
+                h = malloc(size+=size+1);
+                if (!h) {
+                        h_errno = NO_RECOVERY;
+                        return 0;
+                }
+                err = gethostbyname2_r(name, af, h,
+                        (void *)(h+1), size-sizeof *h, &res, &h_errno);
+        } while (err == ERANGE);
+        return err ? 0 : h;
+}