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

fusl/src/network/gai_strerror.c

+#include <netdb.h>
+#include "locale_impl.h"
+
+static const char msgs[] =
+        "Invalid flags\0"
+        "Name does not resolve\0"
+        "Try again\0"
+        "Non-recoverable error\0"
+        "Unknown error\0"
+        "Unrecognized address family or invalid length\0"
+        "Unrecognized socket type\0"
+        "Unrecognized service\0"
+        "Unknown error\0"
+        "Out of memory\0"
+        "System error\0"
+        "Overflow\0"
+        "\0Unknown error";
+
+const char *gai_strerror(int ecode)
+{
+        const char *s;
+        for (s=msgs, ecode++; ecode && *s; ecode++, s++) for (; *s; s++);
+        if (!*s) s++;
+        return LCTRANS_CUR(s);
+}