Avoid the redundant declaration of the function prototypes.

When the server version is 9.4 or later, PG_FUNCTION_INFO_V1 macro
always creates the prototype of its given function, so we avoid
declaring the prototypes of all the global functions for ludia_funcs.
The function prototypes are there only when the server version is 9.3
or before.

diff --git a/ludia_funcs.c b/ludia_funcs.c
index de269e4..a14fb52 100644 (file)
--- a/ludia_funcs.c
+++ b/ludia_funcs.c
@@ -61,13 +61,20 @@ static bool escape_snippet_keyword = false;
 #define ISSENNAOPSCHAR(x) (*(x) == '+' || *(x) == '-' || *(x) == ' ')
 
 PG_FUNCTION_INFO_V1(pgs2snippet1);
-Datum  pgs2snippet1(PG_FUNCTION_ARGS);
 PG_FUNCTION_INFO_V1(pgs2norm);
-Datum  pgs2norm(PG_FUNCTION_ARGS);
 PG_FUNCTION_INFO_V1(pgs2textporter1);
-Datum  pgs2textporter1(PG_FUNCTION_ARGS);
 PG_FUNCTION_INFO_V1(pgs2seninfo);
+
+/*                                                                                                                                                                                                                                                                                                                          * The function prototypes are created as a part of PG_FUNCTION_INFO_V1
+ * macro since 9.4, and hence the declaration of the function prototypes
+ * here is necessary only for 9.3 or before.
+ */
+#if PG_VERSION_NUM < 90400
+Datum  pgs2snippet1(PG_FUNCTION_ARGS);
+Datum  pgs2norm(PG_FUNCTION_ARGS);
+Datum  pgs2textporter1(PG_FUNCTION_ARGS);
 Datum  pgs2seninfo(PG_FUNCTION_ARGS);
+#endif
 
 static sen_encoding    GetSennaEncoding(void);
 static sen_query       *GetSennaQuery(char *str, size_t len);