pg_dump: Add GCC noreturn attribute to appropriate functions

This is a small help to the compiler and static analyzers.

src/bin/pg_dump/dumputils.h

@@ -57,7 +57,7 @@ extern void write_msg(const char *modulename, const char *fmt,...)
 extern void vwrite_msg(const char *modulename, const char *fmt, va_list ap)
 				__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 0)));
 extern void exit_horribly(const char *modulename, const char *fmt,...)
-				__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3)));
+				__attribute__((format(PG_PRINTF_ATTRIBUTE, 2, 3), noreturn));
 extern void set_section (const char *arg, int *dumpSections);
 
 #endif   /* DUMPUTILS_H */

src/bin/pg_dump/pg_backup_archiver.c

@@ -123,7 +123,7 @@ static int	RestoringToDB(ArchiveHandle *AH);
 static void dump_lo_buf(ArchiveHandle *AH);
 static void vdie_horribly(ArchiveHandle *AH, const char *modulename,
 						  const char *fmt, va_list ap)
-	__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0)));
+	__attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 0), noreturn));
 
 static void dumpTimestamp(ArchiveHandle *AH, const char *msg, time_t tim);
 static void SetOutput(ArchiveHandle *AH, char *filename, int compression);

src/bin/pg_dump/pg_backup_archiver.h

@@ -325,7 +325,7 @@ typedef struct _tocEntry
 } TocEntry;
 
 
-extern void die_horribly(ArchiveHandle *AH, const char *modulename, const char *fmt,...) __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
+extern void die_horribly(ArchiveHandle *AH, const char *modulename, const char *fmt,...) __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4), noreturn));
 extern void warn_or_die_horribly(ArchiveHandle *AH, const char *modulename, const char *fmt,...) __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
 
 extern void WriteTOC(ArchiveHandle *AH);

src/bin/pg_dump/pg_dump.h

@@ -524,7 +524,7 @@ extern void simple_string_list_append(SimpleStringList *list, const char *val);
 extern bool simple_oid_list_member(SimpleOidList *list, Oid val);
 extern bool simple_string_list_member(SimpleStringList *list, const char *val);
 
-extern void exit_nicely(void);
+extern void exit_nicely(void) __attribute__((noreturn));
 
 extern void parseOidArray(const char *str, Oid *array, int arraysize);