Changes to fix/improve the dynamic loading on NT

From: Horak Daniel <horak@mmp.plzen-city.cz>

src/backend/commands/trigger.c

@@ -35,7 +35,7 @@
 #include "utils/acl.h"
 #endif
 
-TriggerData *CurrentTriggerData = NULL;
+DLLIMPORT TriggerData *CurrentTriggerData = NULL;
 
 void		RelationBuildTriggers(Relation relation);
 void		FreeTriggerDesc(Relation relation);

src/backend/executor/spi.c

@@ -3,7 +3,7 @@
  * spi.c
  *				Server Programming Interface
  *
- * $Id: spi.c,v 1.34 1999/02/13 23:15:30 momjian Exp $
+ * $Id: spi.c,v 1.35 1999/03/09 13:39:00 scrappy Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -19,9 +19,9 @@ static _SPI_connection *_SPI_current = NULL;
 static int	_SPI_connected = -1;
 static int	_SPI_curid = -1;
 
-uint32		SPI_processed = 0;
-SPITupleTable *SPI_tuptable;
-int			SPI_result;
+DLLIMPORT uint32 	SPI_processed = 0;
+DLLIMPORT SPITupleTable *SPI_tuptable;
+DLLIMPORT int			SPI_result;
 
 static int	_SPI_execute(char *src, int tcount, _SPI_plan *plan);
 static int	_SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount);

src/include/c.h

@@ -7,7 +7,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: c.h,v 1.51 1999/02/13 23:20:44 momjian Exp $
+ * $Id: c.h,v 1.52 1999/03/09 13:39:01 scrappy Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -57,6 +57,10 @@
 #include <errno.h>
 #endif
 
+#ifdef __CYGWIN32__
+#include <errno.h>
+#endif
+
 /* ----------------------------------------------------------------
  *				Section 1:	bool, true, false, TRUE, FALSE
  * ----------------------------------------------------------------
@@ -829,6 +833,20 @@ extern char *form(const char *fmt,...);
 #define COPY_CMD		"cp"
 #define SEP_CHAR		'/'
 
+/* defines for dynamic linking on Win32 platform */
+#ifdef __CYGWIN32__
+#if __GNUC__ && ! defined (__declspec)
+#error You need egcs 1.1 or newer for compiling!
+#endif
+#ifdef BUILDING_DLL
+#define DLLIMPORT __declspec (dllexport)
+#else /* not BUILDING_DLL */
+#define DLLIMPORT __declspec (dllimport)
+#endif
+#else /* not CYGWIN */
+#define DLLIMPORT
+#endif
+
 /* Provide prototypes for routines not present in a particular machine's
  * standard C library.  It'd be better to put these in config.h, but
  * in config.h we haven't yet included anything that defines size_t...

src/include/commands/trigger.h

@@ -26,7 +26,7 @@ typedef struct TriggerData
 	Trigger    *tg_trigger;
 } TriggerData;
 
-extern TriggerData *CurrentTriggerData;
+extern DLLIMPORT TriggerData *CurrentTriggerData;
 
 #define TRIGGER_EVENT_INSERT			0x00000000
 #define TRIGGER_EVENT_DELETE			0x00000001

src/include/executor/spi.h

@@ -66,9 +66,9 @@ typedef struct
 #define SPI_OK_UPDATE			9
 #define SPI_OK_CURSOR			10
 
-extern uint32 SPI_processed;
-extern SPITupleTable *SPI_tuptable;
-extern int	SPI_result;
+extern DLLIMPORT uint32 SPI_processed;
+extern DLLIMPORT SPITupleTable *SPI_tuptable;
+extern DLLIMPORT int	SPI_result;
 
 extern int	SPI_connect(void);
 extern int	SPI_finish(void);

src/makefiles/Makefile.win

@@ -13,3 +13,8 @@ SHLIB_LINK=$(DLLLIBS)
 	$(DLLTOOL) --export-all --output-def $*.def $<
 	$(DLLWRAP) -o $@ --def $*.def $< $(SRCDIR)/utils/dllinit.o $(DLLLIBS)
 	rm -f $*.def
+
+curdir:=$(shell pwd)
+ifeq ($(findstring backend,$(curdir)), backend)
+CFLAGS+= -DBUILDING_DLL=1
+endif