Fix some unportable constructs in parallel pg_dump code.

Didn't compile on semi-obsolete gcc, and probably not on not-gcc-at-all
either.

src/bin/pg_dump/dumputils.h

@@ -44,6 +44,7 @@ typedef void (*on_exit_nicely_callback) (int code, void *arg);
 
 extern int	quote_all_identifiers;
 extern const char *progname;
+extern void (*on_exit_msg_func) (const char *modulename, const char *fmt, va_list ap);
 
 extern void init_parallel_dump_utils(void);
 extern const char *fmtId(const char *identifier);
@@ -87,8 +88,6 @@ __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 0)));
 extern void
 exit_horribly(const char *modulename, const char *fmt,...)
 __attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3), noreturn));
-extern void (*on_exit_msg_func) (const char *modulename, const char *fmt, va_list ap)
-			__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 0)));
 extern void on_exit_nicely(on_exit_nicely_callback function, void *arg);
 extern void exit_nicely(int code) __attribute__((noreturn));
 

src/bin/pg_dump/parallel.h

@@ -29,12 +29,6 @@ typedef enum
 	WRKR_FINISHED
 }	T_WorkerStatus;
 
-typedef enum T_Action
-{
-	ACT_DUMP,
-	ACT_RESTORE,
-}	T_Action;
-
 /* Arguments needed for a worker process */
 typedef struct ParallelArgs
 {

src/bin/pg_dump/pg_backup_archiver.h

@@ -114,7 +114,12 @@ struct _tocEntry;
 struct _restoreList;
 struct ParallelArgs;
 struct ParallelState;
-enum T_Action;
+
+typedef enum T_Action
+{
+	ACT_DUMP,
+	ACT_RESTORE
+} T_Action;
 
 typedef void (*ClosePtr) (struct _archiveHandle * AH);
 typedef void (*ReopenPtr) (struct _archiveHandle * AH);
@@ -145,9 +150,9 @@ typedef void (*DeClonePtr) (struct _archiveHandle * AH);
 typedef char *(*WorkerJobRestorePtr) (struct _archiveHandle * AH, struct _tocEntry * te);
 typedef char *(*WorkerJobDumpPtr) (struct _archiveHandle * AH, struct _tocEntry * te);
 typedef char *(*MasterStartParallelItemPtr) (struct _archiveHandle * AH, struct _tocEntry * te,
-														 enum T_Action act);
+														 T_Action act);
 typedef int (*MasterEndParallelItemPtr) (struct _archiveHandle * AH, struct _tocEntry * te,
-										 const char *str, enum T_Action act);
+										 const char *str, T_Action act);
 
 typedef size_t (*CustomOutPtr) (struct _archiveHandle * AH, const void *buf, size_t len);