plpgsql_check_builtins.h

#ifndef PLPGSQL_CHECK_BUILTINS
#define PLPGSQL_CHECK_BUILTINS

#ifdef _MSC_VER
/*
 * _PG_init should be exported, but PGDLLEXPORT cannot be used due
 * collision with _PG_init from plpgsql.h
 */
#ifdef _M_X64
#pragma comment( linker, "/export:_PG_init" )
#else
#pragma comment( linker, "/export:_PG_init=__PG_init" )
#endif
#endif

#ifndef PGDLLEXPORT
#ifdef _MSC_VER
#define PGDLLEXPORT	__declspec(dllexport)

/*
 * PG_MODULE_MAGIC and PG_FUNCTION_INFO_V1 macros are broken for MSVC.
 * So, we redefine them.
 */

#undef PG_MODULE_MAGIC
#define PG_MODULE_MAGIC \
extern PGDLLEXPORT const Pg_magic_struct *PG_MAGIC_FUNCTION_NAME(void); \
const Pg_magic_struct * \
PG_MAGIC_FUNCTION_NAME(void) \
{ \
	static const Pg_magic_struct Pg_magic_data = PG_MODULE_MAGIC_DATA; \
	return &Pg_magic_data; \
} \
extern int no_such_variable

#undef PG_FUNCTION_INFO_V1
#define PG_FUNCTION_INFO_V1(funcname) \
extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \
const Pg_finfo_record * \
CppConcat(pg_finfo_,funcname) (void) \
{ \
	static const Pg_finfo_record my_finfo = { 1 }; \
	return &my_finfo; \
} \
extern int no_such_variable

#else
#define PGDLLEXPORT	PGDLLIMPORT
#endif
#endif

/*
 * Interface
 *
 */
extern void _PG_init(void);

extern PGDLLEXPORT Datum plpgsql_check_function_tb(PG_FUNCTION_ARGS);
extern PGDLLEXPORT Datum plpgsql_check_function(PG_FUNCTION_ARGS);

#endif