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

fusl/src/string/wcstok.c

Index: fusl/src/string/wcstok.c
diff --git a/fusl/src/string/wcstok.c b/fusl/src/string/wcstok.c
new file mode 100644
index 0000000000000000000000000000000000000000..ecc8033190c781c6f75574686d3681254dee843f
--- /dev/null
+++ b/fusl/src/string/wcstok.c
@@ -0,0 +1,12 @@
+#include <wchar.h>
+
+wchar_t *wcstok(wchar_t *restrict s, const wchar_t *restrict sep, wchar_t **restrict p)
+{
+	if (!s && !(s = *p)) return NULL;
+	s += wcsspn(s, sep);
+	if (!*s) return *p = 0;
+	*p = s + wcscspn(s, sep);
+	if (**p) *(*p)++ = 0;
+	else *p = 0;
+	return s;
+}