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

fusl/src/network/gethostbyname.c

+#define _GNU_SOURCE
+
+#include <sys/socket.h>
+#include <netdb.h>
+#include <string.h>
+#include <netinet/in.h>
+
+struct hostent *gethostbyname(const char *name)
+{
+        return gethostbyname2(name, AF_INET);
+}
+
+#if 0
+struct hostent *gethostbyname(const char *name)
+{
+        static struct hostent h;
+        static char *h_aliases[3];
+        static char h_canon[256];
+        static char *h_addr_list[10];
+        static char h_addr_data[10][4];
+        static const struct addrinfo hint = {
+                .ai_family = AF_INET, .ai_flags = AI_CANONNAME
+        };
+        struct addrinfo *ai, *p;
+        int i;
+
+        switch (getaddrinfo(name, 0, &hint, &ai)) {
+        case EAI_NONAME:
+                h_errno = HOST_NOT_FOUND;
+                break;
+        case EAI_AGAIN:
+                h_errno = TRY_AGAIN;
+                break;
+        case EAI_FAIL:
+                h_errno = NO_RECOVERY;
+                break;
+        default:
+        case EAI_MEMORY:
+        case EAI_SYSTEM:
+                h_errno = NO_DATA;
+                break;
+        case 0:
+                break;
+        }
+
+        strcpy(h_canon, ai->ai_canonname);
+        h.h_name = h_canon;
+        h.h_aliases = h_aliases;
+        h.h_aliases[0] = h_canon;
+        h.h_aliases[1] = strcmp(h_canon, name) ? (char *)name : 0;
+        h.h_length = 4;
+        h.h_addr_list = h_addr_list;
+        for (i=0, p=ai; i<sizeof h_addr_data/4 && p; i++, p=p->ai_next) {
+                h.h_addr_list[i] = h_addr_data[i];
+                memcpy(h.h_addr_list[i],
+                        &((struct sockaddr_in *)p->ai_addr)->sin_addr, 4);
+        }
+        h.h_addr_list[i] = 0;
+        h.h_addrtype = AF_INET;
+        freeaddrinfo(ai);
+        return &h;
+}
+#endif