Move pg_upgrade_support global variables to their own include file

Previously their declarations were spread around to avoid accidental
access.

contrib/pg_upgrade_support/pg_upgrade_support.c

@@ -11,6 +11,7 @@
 
 #include "postgres.h"
 
+#include "catalog/binary_upgrade.h"
 #include "catalog/namespace.h"
 #include "catalog/pg_type.h"
 #include "commands/extension.h"
@@ -24,17 +25,6 @@
 PG_MODULE_MAGIC;
 #endif
 
-extern PGDLLIMPORT Oid binary_upgrade_next_pg_type_oid;
-extern PGDLLIMPORT Oid binary_upgrade_next_array_pg_type_oid;
-extern PGDLLIMPORT Oid binary_upgrade_next_toast_pg_type_oid;
-
-extern PGDLLIMPORT Oid binary_upgrade_next_heap_pg_class_oid;
-extern PGDLLIMPORT Oid binary_upgrade_next_index_pg_class_oid;
-extern PGDLLIMPORT Oid binary_upgrade_next_toast_pg_class_oid;
-
-extern PGDLLIMPORT Oid binary_upgrade_next_pg_enum_oid;
-extern PGDLLIMPORT Oid binary_upgrade_next_pg_authid_oid;
-
 Datum		set_next_pg_type_oid(PG_FUNCTION_ARGS);
 Datum		set_next_array_pg_type_oid(PG_FUNCTION_ARGS);
 Datum		set_next_toast_pg_type_oid(PG_FUNCTION_ARGS);

src/backend/catalog/heap.c

@@ -34,6 +34,7 @@
 #include "access/sysattr.h"
 #include "access/transam.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/catalog.h"
 #include "catalog/dependency.h"
 #include "catalog/heap.h"

src/backend/catalog/index.c

@@ -30,6 +30,7 @@
 #include "access/visibilitymap.h"
 #include "access/xact.h"
 #include "bootstrap/bootstrap.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/catalog.h"
 #include "catalog/dependency.h"
 #include "catalog/heap.h"

src/backend/catalog/pg_enum.c

@@ -17,6 +17,7 @@
 #include "access/heapam.h"
 #include "access/htup_details.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/catalog.h"
 #include "catalog/indexing.h"
 #include "catalog/pg_enum.h"

src/backend/catalog/pg_type.c

@@ -17,6 +17,7 @@
 #include "access/heapam.h"
 #include "access/htup_details.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/dependency.h"
 #include "catalog/indexing.h"
 #include "catalog/objectaccess.h"

src/backend/catalog/toasting.c

@@ -16,6 +16,7 @@
 
 #include "access/tuptoaster.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/dependency.h"
 #include "catalog/heap.h"
 #include "catalog/index.h"
@@ -31,8 +32,6 @@
 #include "utils/syscache.h"
 
 /* Potentially set by contrib/pg_upgrade_support functions */
-extern Oid	binary_upgrade_next_toast_pg_class_oid;
-
 Oid			binary_upgrade_next_toast_pg_type_oid = InvalidOid;
 
 static bool create_toast_table(Relation rel, Oid toastOid, Oid toastIndexOid,

src/backend/commands/typecmds.c

@@ -35,6 +35,7 @@
 #include "access/heapam.h"
 #include "access/htup_details.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/catalog.h"
 #include "catalog/dependency.h"
 #include "catalog/heap.h"

src/backend/commands/user.c

@@ -16,6 +16,7 @@
 #include "access/heapam.h"
 #include "access/htup_details.h"
 #include "access/xact.h"
+#include "catalog/binary_upgrade.h"
 #include "catalog/dependency.h"
 #include "catalog/indexing.h"
 #include "catalog/objectaccess.h"

src/include/catalog/binary_upgrade.h

@@ -0,0 +1,29 @@
+/*-------------------------------------------------------------------------
+ *
+ * binary_upgrade.h
+ *	  variables used for binary upgrades
+ *
+ *
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/binary_upgrade.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef BINARY_UPGRADE_H
+#define BINARY_UPGRADE_H
+
+extern PGDLLIMPORT Oid binary_upgrade_next_pg_type_oid;
+extern PGDLLIMPORT Oid binary_upgrade_next_array_pg_type_oid;
+extern PGDLLIMPORT Oid binary_upgrade_next_toast_pg_type_oid;
+
+extern PGDLLIMPORT Oid binary_upgrade_next_heap_pg_class_oid;
+extern PGDLLIMPORT Oid binary_upgrade_next_index_pg_class_oid;
+extern PGDLLIMPORT Oid binary_upgrade_next_toast_pg_class_oid;
+
+extern PGDLLIMPORT Oid binary_upgrade_next_pg_enum_oid;
+extern PGDLLIMPORT Oid binary_upgrade_next_pg_authid_oid;
+
+#endif   /* BINARY_UPGRADE_H */
+