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

fusl/src/stdio/snprintf.c

Index: fusl/src/stdio/snprintf.c
diff --git a/fusl/src/stdio/snprintf.c b/fusl/src/stdio/snprintf.c
new file mode 100644
index 0000000000000000000000000000000000000000..771503b284eba969c9f26e0e05416be0083e429d
--- /dev/null
+++ b/fusl/src/stdio/snprintf.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdarg.h>
+
+int snprintf(char *restrict s, size_t n, const char *restrict fmt, ...)
+{
+	int ret;
+	va_list ap;
+	va_start(ap, fmt);
+	ret = vsnprintf(s, n, fmt, ap);
+	va_end(ap);
+	return ret;
+}
+