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

fusl/src/locale/textdomain.c

+#include <libintl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <limits.h>
+#include "libc.h"
+#include "atomic.h"
+
+static char *current_domain;
+
+char *__gettextdomain()
+{
+        return current_domain ? current_domain : "messages";
+}
+
+char *textdomain(const char *domainname)
+{
+        if (!domainname) return __gettextdomain();
+
+        size_t domlen = strlen(domainname);
+        if (domlen > NAME_MAX) {
+                errno = EINVAL;
+                return 0;
+        }
+
+        if (!current_domain) {
+                current_domain = malloc(NAME_MAX+1);
+                if (!current_domain) return 0;
+        }
+
+        memcpy(current_domain, domainname, domlen+1);
+
+        return current_domain;
+}
+
+char *gettext(const char *msgid)
+{
+        return dgettext(0, msgid);
+}
+
+char *ngettext(const char *msgid1, const char *msgid2, unsigned long int n)
+{
+        return dngettext(0, msgid1, msgid2, n);
+}