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

external/include/sodium/crypto_shorthash_siphash24.h

@@ -0,0 +1,50 @@
+#ifndef crypto_shorthash_siphash24_H
+#define crypto_shorthash_siphash24_H
+
+#include <stddef.h>
+#include "export.h"
+
+#ifdef __cplusplus
+# ifdef __GNUC__
+#  pragma GCC diagnostic ignored "-Wlong-long"
+# endif
+extern "C" {
+#endif
+
+/* -- 64-bit output -- */
+
+#define crypto_shorthash_siphash24_BYTES 8U
+SODIUM_EXPORT
+size_t crypto_shorthash_siphash24_bytes(void);
+
+#define crypto_shorthash_siphash24_KEYBYTES 16U
+SODIUM_EXPORT
+size_t crypto_shorthash_siphash24_keybytes(void);
+
+SODIUM_EXPORT
+int crypto_shorthash_siphash24(unsigned char *out, const unsigned char *in,
+                               unsigned long long inlen, const unsigned char *k)
+            __attribute__ ((nonnull(1, 4)));
+
+#ifndef SODIUM_LIBRARY_MINIMAL
+/* -- 128-bit output -- */
+
+#define crypto_shorthash_siphashx24_BYTES 16U
+SODIUM_EXPORT
+size_t crypto_shorthash_siphashx24_bytes(void);
+
+#define crypto_shorthash_siphashx24_KEYBYTES 16U
+SODIUM_EXPORT
+size_t crypto_shorthash_siphashx24_keybytes(void);
+
+SODIUM_EXPORT
+int crypto_shorthash_siphashx24(unsigned char *out, const unsigned char *in,
+                                unsigned long long inlen, const unsigned char *k)
+            __attribute__ ((nonnull(1, 4)));
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif