Now that much of walreceiver has been pulled back into the postgres

binary, revert PGDLLIMPORT decoration of global variables. I'm not sure
if there's any real harm from unnecessary PGDLLIMPORTs, but these are all
internal variables that external modules really shouldn't be messing
with. ThisTimeLineID still needs PGDLLIMPORT.

src/include/libpq/pqsignal.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/libpq/pqsignal.h,v 1.39 2010/01/16 05:52:29 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/libpq/pqsignal.h,v 1.40 2010/01/20 18:54:27 heikki Exp $
  *
  * NOTES
  *	  This shouldn't be in libpq, but the monitor and some other
@@ -21,13 +21,13 @@
 #include <signal.h>
 
 #ifdef HAVE_SIGPROCMASK
-extern PGDLLIMPORT sigset_t UnBlockSig,
+extern sigset_t UnBlockSig,
 			BlockSig,
 			StartupBlockSig;
 
 #define PG_SETMASK(mask)	sigprocmask(SIG_SETMASK, mask, NULL)
 #else /* not HAVE_SIGPROCMASK */
-extern PGDLLIMPORT int	UnBlockSig,
+extern int	UnBlockSig,
 			BlockSig,
 			StartupBlockSig;
 

src/include/replication/walreceiver.h

@@ -5,7 +5,7 @@
  *
  * Portions Copyright (c) 2010-2010, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/include/replication/walreceiver.h,v 1.3 2010/01/20 09:16:24 heikki Exp $
+ * $PostgreSQL: pgsql/src/include/replication/walreceiver.h,v 1.4 2010/01/20 18:54:27 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -59,7 +59,7 @@ typedef struct
 	slock_t	mutex;		/* locks shared variables shown above */
 } WalRcvData;
 
-extern PGDLLIMPORT WalRcvData *WalRcv;
+extern WalRcvData *WalRcv;
 
 /* libpqwalreceiver hooks */
 typedef bool (*walrcv_connect_type) (char *conninfo, XLogRecPtr startpoint);

src/include/storage/ipc.h

@@ -11,7 +11,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/ipc.h,v 1.80 2010/01/16 00:04:41 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/storage/ipc.h,v 1.81 2010/01/20 18:54:27 heikki Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -62,7 +62,7 @@ typedef void (*shmem_startup_hook_type) (void);
 
 
 /* ipc.c */
-extern PGDLLIMPORT bool proc_exit_inprogress;
+extern bool proc_exit_inprogress;
 
 extern void proc_exit(int code);
 extern void shmem_exit(int code);