--- /dev/null
+/*
+ * Summary: interface for HashKit functions
+ * Description: visibitliy macros for HashKit library
+ *
+ * Use and distribution licensed under the BSD license. See
+ * the COPYING file in this directory for full text.
+ *
+ * Author: Monty Taylor
+ */
+
+/**
+ * @file
+ * @brief Visibility control macros
+ */
+
+#pragma once
+
+/**
+ *
+ * HASHKIT_API is used for the public API symbols. It either DLL imports or
+ * DLL exports (or does nothing for static build).
+ *
+ * HASHKIT_LOCAL is used for non-api symbols.
+ */
+
+#if defined(BUILDING_HASHKIT)
+# if defined(HAVE_VISIBILITY) && HAVE_VISIBILITY
+# define HASHKIT_API __attribute__ ((visibility("default")))
+# define HASHKIT_LOCAL __attribute__ ((visibility("hidden")))
+# elif defined (__SUNPRO_C) && (__SUNPRO_C >= 0x550)
+# define HASHKIT_API __global
+# define HASHKIT_LOCAL __hidden
+# elif defined(_MSC_VER)
+# define HASHKIT_API extern __declspec(dllexport)
+# define HASHKIT_LOCAL
+# else
+# define HASHKIT_API
+# define HASHKIT_LOCAL
+# endif /* defined(HAVE_VISIBILITY) */
+#else /* defined(BUILDING_HASHKIT) */
+# if defined(_MSC_VER)
+# define HASHKIT_API extern __declspec(dllimport)
+# define HASHKIT_LOCAL
+# else
+# define HASHKIT_API
+# define HASHKIT_LOCAL
+# endif /* defined(_MSC_VER) */
+#endif /* defined(BUILDING_HASHKIT) */