Fix tab-complete so it works with old versions of readline that don't

have the rl_completion_append_character variable.  The tab completion
behavior doesn't seem to be quite perfect in that situation, but it's
better than failing to build at all...

src/bin/psql/tab-complete.c

@@ -3,7 +3,7 @@
  *
  * Copyright 2000 by PostgreSQL Global Development Team
  *
- * $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.7 2000/01/18 23:30:24 petere Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.8 2000/01/21 23:32:36 tgl Exp $
  */
 
 /*-----------
@@ -532,7 +532,9 @@ char ** psql_completion(char *text, int start, int end)
        attempts filename completion, and that's usually no good. */
     if (matches == NULL) {
         COMPLETE_WITH_CONST("");
+#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
         rl_completion_append_character = '\0';
+#endif
     }
 	
 

src/configure.in

@@ -840,11 +840,16 @@ AC_CHECK_FUNC(rint,
 	      AC_DEFINE(HAVE_RINT),
 	      AC_CHECK_LIB(m, rint, AC_DEFINE(HAVE_RINT), , $HPUXMATHLIB))
 
+dnl Some old versions of libreadline don't have rl_completion_append_character
+AC_EGREP_HEADER(rl_completion_append_character, readline.h,
+	AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER),
+	[AC_EGREP_HEADER(rl_completion_append_character, readline/readline.h,
+		AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER))])
+AC_SUBST(HAVE_RL_COMPLETION_APPEND_CHARACTER)
 
 dnl Check for GNU style long options support (getopt_long)
 AC_CHECK_FUNCS(getopt_long)
 
-
 AC_MSG_CHECKING(for finite() macro or function)
 AC_TRY_LINK([#include <math.h>],
 	[int dummy=finite(1.0);],

src/include/config.h.in

@@ -454,6 +454,9 @@ extern void srandom(unsigned int seed);
 /* Set to 1 if you have libhistory.a */
 #undef HAVE_LIBHISTORY
 
+/* Set to 1 if your libreadline defines rl_completion_append_character */
+#undef HAVE_RL_COMPLETION_APPEND_CHARACTER
+
 /* Set to 1 if you have getopt_long() (GNU long options) */
 #undef HAVE_GETOPT_LONG