--- /dev/null
+#include <stdio.h>
+#include <string.h>
+#include "config.h"
+
+/**
+ * md4 - MD4 Message Digest Algorithm (RFC1320).
+ *
+ * Message Digest #4 is a 128-bit hashing algorithm; it is quick but
+ * not sufficiently strong for cryptographic use (duplicates can be
+ * found very efficiently). It provides sufficient mixing to have an
+ * avalanche effect: any change in input changes the output completely.
+ *
+ * Example:
+ * #include <stdio.h>
+ * #include <ccan/md4/md4.h>
+ *
+ * // Provide MD4 sums of the input strings.
+ * int main(int argc, char *argv[])
+ * {
+ * unsigned int i, j;
+ * struct md4_ctx ctx;
+ *
+ * for (i = 1; i < argc; i++) {
+ * md4_init(&ctx);
+ * md4_hash(&ctx, argv[i], strlen(argv[i]));
+ * md4_finish(&ctx);
+ * for (j = 0; j < 16; j++)
+ * printf("%02x", ctx.hash.bytes[j]);
+ * printf("\n");
+ * }
+ * return 0;
+ * }
+ *
+ * Licence: LGPL (2 or any later version)
+ */
+int main(int argc, char *argv[])
+{
+ if (argc != 2)
+ return 1;
+
+ if (strcmp(argv[1], "depends") == 0) {
+ printf("ccan/endian\n");
+ printf("ccan/array_size\n");
+ return 0;
+ }
+
+ return 1;
+}