Create function prototype as part of PG_FUNCTION_INFO_V1 macro

Because of gcc -Wmissing-prototypes, all functions in dynamically
loadable modules must have a separate prototype declaration.  This is
meant to detect global functions that are not declared in header files,
but in cases where the function is called via dfmgr, this is redundant.
Besides filling up space with boilerplate, this is a frequent source of
compiler warnings in extension modules.

We can fix that by creating the function prototype as part of the
PG_FUNCTION_INFO_V1 macro, which such modules have to use anyway.  That
makes the code of modules cleaner, because there is one less place where
the entry points have to be listed, and creates an additional check that
functions have the right prototype.

Remove now redundant prototypes from contrib and other modules.

4 files changed, 1 insertions, 21 deletions

diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c
index 5fff63558f1..ffdf634f55b 100644
--- a/src/pl/plperl/plperl.c
+++ b/src/pl/plperl/plperl.c
@@ -240,12 +240,6 @@ static plperl_call_data *current_call_data = NULL;
 /**********************************************************************
  * Forward declarations
  **********************************************************************/
-Datum		plperl_call_handler(PG_FUNCTION_ARGS);
-Datum		plperl_inline_handler(PG_FUNCTION_ARGS);
-Datum		plperl_validator(PG_FUNCTION_ARGS);
-Datum		plperlu_call_handler(PG_FUNCTION_ARGS);
-Datum		plperlu_inline_handler(PG_FUNCTION_ARGS);
-Datum		plperlu_validator(PG_FUNCTION_ARGS);
 void		_PG_init(void);
 
 static PerlInterpreter *plperl_init_interp(void);
diff --git a/src/pl/plpgsql/src/plpgsql.h b/src/pl/plpgsql/src/plpgsql.h
index 41fc9407a22..b4d1498e436 100644
--- a/src/pl/plpgsql/src/plpgsql.h
+++ b/src/pl/plpgsql/src/plpgsql.h
@@ -950,9 +950,6 @@ extern void plpgsql_HashTableInit(void);
  * ----------
  */
 extern void _PG_init(void);
-extern Datum plpgsql_call_handler(PG_FUNCTION_ARGS);
-extern Datum plpgsql_inline_handler(PG_FUNCTION_ARGS);
-extern Datum plpgsql_validator(PG_FUNCTION_ARGS);
 
 /* ----------
  * Functions in pl_exec.c
diff --git a/src/pl/plpython/plpy_main.c b/src/pl/plpython/plpy_main.c
index 4438721589e..5f03efa4fb6 100644
--- a/src/pl/plpython/plpy_main.c
+++ b/src/pl/plpython/plpy_main.c
@@ -40,16 +40,6 @@
 #endif
 
 extern void _PG_init(void);
-extern Datum plpython_validator(PG_FUNCTION_ARGS);
-extern Datum plpython_call_handler(PG_FUNCTION_ARGS);
-extern Datum plpython_inline_handler(PG_FUNCTION_ARGS);
-
-#if PY_MAJOR_VERSION < 3
-/* Define aliases plpython2_call_handler etc */
-extern Datum plpython2_validator(PG_FUNCTION_ARGS);
-extern Datum plpython2_call_handler(PG_FUNCTION_ARGS);
-extern Datum plpython2_inline_handler(PG_FUNCTION_ARGS);
-#endif
 
 PG_MODULE_MAGIC;
 
@@ -58,6 +48,7 @@ PG_FUNCTION_INFO_V1(plpython_call_handler);
 PG_FUNCTION_INFO_V1(plpython_inline_handler);
 
 #if PY_MAJOR_VERSION < 3
+/* Define aliases plpython2_call_handler etc */
 PG_FUNCTION_INFO_V1(plpython2_validator);
 PG_FUNCTION_INFO_V1(plpython2_call_handler);
 PG_FUNCTION_INFO_V1(plpython2_inline_handler);
diff --git a/src/pl/tcl/pltcl.c b/src/pl/tcl/pltcl.c
index 2d862a6b059..8c18d5ea205 100644
--- a/src/pl/tcl/pltcl.c
+++ b/src/pl/tcl/pltcl.c
@@ -192,8 +192,6 @@ static pltcl_proc_desc *pltcl_current_prodesc = NULL;
 /**********************************************************************
  * Forward declarations
  **********************************************************************/
-Datum		pltcl_call_handler(PG_FUNCTION_ARGS);
-Datum		pltclu_call_handler(PG_FUNCTION_ARGS);
 void		_PG_init(void);
 
 static void pltcl_init_interp(pltcl_interp_desc *interp_desc, bool pltrusted);