add external dependencies in a pre-built way to avoid incompatibilities

external/include/sodium/crypto_shorthash.h

@@ -0,0 +1,41 @@
+#ifndef crypto_shorthash_H
+#define crypto_shorthash_H
+
+#include <stddef.h>
+
+#include "crypto_shorthash_siphash24.h"
+#include "export.h"
+
+#ifdef __cplusplus
+# ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wlong-long"
+# endif
+extern "C" {
+#endif
+
+#define crypto_shorthash_BYTES crypto_shorthash_siphash24_BYTES
+SODIUM_EXPORT
+size_t  crypto_shorthash_bytes(void);
+
+#define crypto_shorthash_KEYBYTES crypto_shorthash_siphash24_KEYBYTES
+SODIUM_EXPORT
+size_t  crypto_shorthash_keybytes(void);
+
+#define crypto_shorthash_PRIMITIVE "siphash24"
+SODIUM_EXPORT
+const char *crypto_shorthash_primitive(void);
+
+SODIUM_EXPORT
+int crypto_shorthash(unsigned char *out, const unsigned char *in,
+                     unsigned long long inlen, const unsigned char *k)
+            __attribute__ ((nonnull(1, 4)));
+
+SODIUM_EXPORT
+void crypto_shorthash_keygen(unsigned char k[crypto_shorthash_KEYBYTES])
+            __attribute__ ((nonnull));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif