From 4b2e5e591466d68f4d8f5cdcad1efbe2882f284e Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Tue, 7 Apr 2009 10:22:26 -0700
Subject: [PATCH] Check for both the library and include file when adding
 history.

When adding history (add_history) use both the existence of the
library and the header file to determine if history can be
supported. Add a new USE_HISTORY that is the and of these two.
---
 vvp/config.h.in | 9 +++++++++
 vvp/stop.cc     | 8 ++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/vvp/config.h.in b/vvp/config.h.in
index a9d5605f1..71691a402 100644
--- a/vvp/config.h.in
+++ b/vvp/config.h.in
@@ -44,6 +44,7 @@
 # undef HAVE_MALLOC_H
 # undef HAVE_LIBREADLINE
 # undef HAVE_READLINE_READLINE_H
+# undef HAVE_LIBHISTORY
 # undef HAVE_READLINE_HISTORY_H
 # undef HAVE_INTTYPES_H
 # undef HAVE_LROUND
@@ -63,6 +64,14 @@
 #endif
 #endif
 
+/* Figure if I can use history. */
+#undef USE_HISTORY
+#ifdef HAVE_LIBHISTORY
+#ifdef HAVE_READLINE_HISTORY_H
+# define USE_HISTORY
+#endif
+#endif
+
 #ifndef MODULE_DIR
 # define MODULE_DIR "."
 #endif
diff --git a/vvp/stop.cc b/vvp/stop.cc
index 07b6e2af8..b20230fd8 100644
--- a/vvp/stop.cc
+++ b/vvp/stop.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003-2007 Stephen Williams (steve@icarus.com)
+ * Copyright (c) 2003-2009 Stephen Williams (steve@icarus.com)
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -30,10 +30,10 @@
 # include  "schedule.h"
 # include  <stdio.h>
 # include  <ctype.h>
-#ifdef HAVE_READLINE_READLINE_H
+#ifdef USE_READLINE
 # include  <readline/readline.h>
 #endif
-#ifdef HAVE_READLINE_HISTORY_H
+#ifdef USE_HISTORY
 # include  <readline/history.h>
 #endif
 # include  <string.h>
@@ -499,7 +499,7 @@ void stop_handler(int rc)
 		  first += 1;
 
 	    if (first[0] != 0) {
-#ifdef HAVE_READLINE_HISTORY_H
+#ifdef USE_HISTORY
 		  add_history(first);
 #endif
 		  invoke_command(first);